Artigos de revistas: "Praterie"

1

Mari, Leonardo. "Praterie paradossali". Giornale di Clinica Nefrologica e Dialisi 32, n.º 1 (30 de março de 2020): 21. http://dx.doi.org/10.33393/gcnd.2020.1101.

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Sburlino, Giovanni, Gabriella Buffa e Leonardo Ghirelli. "L'analisi corologica nell'interpretazione sintassonomica: L'esempio delle praterie aFestuca paniculata(L.) Sch. et Th." Giornale botanico italiano 130, n.º 1 (janeiro de 1996): 236–47. http://dx.doi.org/10.1080/11263509609439530.

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Guido, M. A., D. Moreno, C. Montanari e G. Poggi. "Antiche Praterie e Rimboschimenti del XIX Secolo: Studi di Storia Della Copertura Vegetale". Giornale botanico italiano 130, n.º 1 (janeiro de 1996): 320. http://dx.doi.org/10.1080/11263509609439571.

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Viciani, Daniele, e Antonio Gabellini. "Contributo alla conoscenza della vegetazione del Pratomagno (Toscana orientale): le praterie di crinale ed il complesso forestale regionale del versante casentinese". Webbia 55, n.º 2 (janeiro de 2000): 297–316. http://dx.doi.org/10.1080/00837792.2000.10670697.

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Tomić, Miloš. "RAZMATRENJE IDEJNOG REŠENJA I REALIZACIJA PROJEKTA GREJANJA I KLIMATIZACIJE OBJEKTA SPECIJALNE NAMENE". Zbornik radova Fakulteta tehničkih nauka u Novom Sadu 37, n.º 01 (4 de janeiro de 2022): 16–19. http://dx.doi.org/10.24867/16am06tomic.

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U radu je predstavljen pregled mogućih idejnih rešenja za realizaciju projekata grejanja, ventilacije i klimatizacije objekta specijalizovane namene. Pod objektom specijalizovane namene podrazumeva se objekat sportske hale. U radu je prikazan i kratak pregled proračuna grejanja, ventilacije i klimatizacije kao i metode, definisani svi usvojeni sistemi grejanje, ventilacije i klimatizaciju specificirani za ovakav tip objekta. Rad obuhvata i prateće proračune poput proračuna gasnih instalacija i proračuna odimljavanja objekta, prikaz numeričke i grafičke dokumentacije, kao i prikaz simulacije ubacivanja svežeg vazduha odabranim sistemom ventilacije uz implementaciju odgovarajućih duvaljki. Simulacija je izvedena softverskim programom „LINDAB“. U zaključku je obrazloženo zbog čega su usvojeni određeni sistemi koji će na najefektniji način obezbediti energetske potrebe i visoke komforne zahteve objekta sportske hale sa pratećim prostorijama.

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Murphy, Stephen D., e Lonnie W. Aarssen. "Reduced seed set in Elytrigia repens caused by allelopathic pollen from Phleum pratense". Canadian Journal of Botany 73, n.º 9 (1 de setembro de 1995): 1417–22. http://dx.doi.org/10.1139/b95-154.

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Earlier studies have shown that extracts from pollen of Phleum pratense reduce pollen germination and seed set in Elytrigia repens (L.) Nevski (Poaceae), but the effect of in situ pollen from P. pratense on seed set in E. repens in the field has not been previously demonstrated. By clipping the inflorescences of P. pratense just prior to flowering, we reduced pollen dispersal in fields at three old-field sites. In adjacent fields at all three sites, P. pratense was allowed to flower unimpeded. In the clipped fields, the mean number of pollen grains of P. pratense per stigma of E. repens was reduced to less than 1 versus 9–10 grains in the unmanipulated fields. Mean percent seed set of E. repens in the clipped fields was approximately 65–70%, whereas in the unmanipulated fields it was approximately 15–20%. In the following year, when no treatments were applied (i.e., P. pratense was allowed to disperse naturally in all fields), mean percent seed set in the same plants of E. repens was uniformly reduced to less than 15% in all fields. Several lines of evidence suggest that this reduction in seed set in E. repens was caused by allelopathic pollen of P. pratense, rather than by physical occlusion: (i) previous studies using extracts of P. pratense pollen elicited similar decreases in seed set in E. repens, and the seed set decreases were nonlinear (i.e., not indicative of displacement); (ii) the number of P. pratense pollen grains on E. repens stigmas needed to cause pollen allelopathy (based on previous pollen extract studies) existed in the unmanipulated fields but not in the clipped fields; and (iii) E. repens pollen outnumbered P. pratense pollen on E. repens stigmas by at least 5:1 (even when P. pratense inflorescences were not clipped). Key words: competition, Elytrigia repens, heterospecific pollen transfer, Phleum pratense, pollen allelopathy, reproductive success.

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FERRARIS JR., CARL J. "A new species of the Asian schilbid catfish genus Clupisoma from Myanmar, with a redescription of Clupisoma prateri Hora (Osteichthyes: Siluriformes: Schilbidae)". Zootaxa 437, n.º 1 (23 de fevereiro de 2004): 1. http://dx.doi.org/10.11646/zootaxa.437.1.1.

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The species Clupisoma roosae, new species, is recorded from the upper Irrawaddy River, Myanmar. This species can be distinguished from its sole congener in Myanmar, Clupisoma prateri Hora, 1937, in having a shorter pectoral-fin spine that does not extend past the pelvic-fin origin, a reduced abdominal keel that extends anteriorly only to the level of the pelvic-fin base, only 11 pectoral-fin rays and 45 to 47 branched anal-fin rays. Although the two species occur in the Irrawaddy River, they have not been collected together and appear to inhabit different portions of the river basin. Clupisoma prateri is distributed in the lower and middle reaches of the Irrawaddy River as well as the nearby Sittang, Bago, and Salween rivers, while C. roosae appears to be restricted to the upper reaches of the Irrawaddy. To facilitate comparisons between the two species of Clupisoma in Myanmar, C. prateri is redescribed.

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LIPIŃSKA, HALINA. "Gospodarka wodą wybranych gatunków traw w warunkach zróżnicowanego poziomu wody gruntowej na glebie torfowo-murszowej". Agronomy Science 65, n.º 3 (28 de outubro de 2010): 59–68. http://dx.doi.org/10.24326/as.2010.3.7.

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Celem badań, prowadzonych w lizymetrach na glebie torfowo-murszowej, było określenie ewapotranspiracji rzeczywistej oraz efektywności produkcyjnej wody runi Poa pratensis, Phleum pratense i Lolium perenne w zależności od poziomu wody gruntowej (50 i 90 cm). Każdy gatunek wysiano w monokulturze, a P. pratensis także w mieszankach z Ph. pratense i L. perenne. W sezonie wegetacyjnym ruń ścinano trzykrotnie. Największe zużycie wody na ewapotranspirację rzeczywistą wykazano na obiektach z monokulturą L. perenne. Najmniej wody zużywała ruń P. pratensis + Ph. pratense oraz monokultura P. pratensis. Największe zużycie wody stwierdzono przy wysokim poziomie wody gruntowej oraz w pierwszym odroście runi. W warunkach 50 cm poziomu wody gruntowej największą efektywnością produkcyjną wody odznaczała się ruń P. pratensis + Ph. pratense, natomiast przy niższym poziomie – 90 cm – mieszanka P. pratensis + L. perenne. Małą efektywnością produkcyjną wody charakteryzowała się ruń Ph. pratense. Woda była wykorzystywana najefektywniej w drugim odroście runi.

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9

Isobe, Sachiko, Akira Sawai, Hidekazu Yamaguchi, Mitsuru Gau e Kazuhiro Uchiyama. "Breeding potential of the backcross progenies of a hybrid between Trifolium medium × T. pratense to T. pratense". Canadian Journal of Plant Science 82, n.º 2 (1 de abril de 2002): 395–99. http://dx.doi.org/10.4141/p01-034.

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In this study, T. medium (zigzag clover, 2n = 80 and T. pratense (red clover, 2n = 28) were hybridized and backcrossed four times to T. pratense (BC1, BC2, BC3and BC4), and the seed production and vigor of the backcross progenies were assessed under field conditions. Both female and pollen fertility of the backcross progenies increased as the backcross generations advanced. Female and pollen fertility of BC4 were 21.3 and 65.3%, respectively. When honeybees were used as pollinators, almost all BC4 plants produced mature seeds in the field. Most of the BC1, BC2, and BC3 plants died by the end of the fourth year in the field, whereas 61% of the BC4 plants survived for 4 yr. The number of chromosomes in 79% of the BC4 plants was more than 28, which is greater than that of T. pratense. Differences in leaflet size and shape between BC4 plants and T. pratense suggest that genes from T. medium were expressed in the BC4 plants. These results indicate that BC4 plants may be useful for the improvement of the persistence of T. pratense. Key words: Backcross progeny, breeding material, interspecific hybridization, Trifolium medium, Trifolium pratense

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10

Roeder, Erhard, e Thomas Bourauel. "Pyrrolizidine alkaloids fromMelampyrum pratense". Natural Toxins 1, n.º 1 (1992): 35–37. http://dx.doi.org/10.1002/nt.2620010108.

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Hemels, Paul. "Geen prater". GZ - Psychologie 6, n.º 4 (30 de março de 2014): 19. http://dx.doi.org/10.1007/s41480-014-0034-1.

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12

Kasatkina, Nadezhda Ivanovna, e Zhanna Sergeyevna Nelyubina. "BIOCHEMICAL CHARACTERISTICS OF TRIFOLIUM PRATENSE L. VARIETIES IN THE CONDITIONS OF THE UDMURT REPUBLIC". chemistry of plant raw material, n.º 1 (10 de março de 2022): 261–68. http://dx.doi.org/10.14258/jcprm.2022019350.

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The aim of the study was to conduct a comparative biochemical study of plant raw materials of different varieties of Trifolium pratense L. and identification of the most valuable for cultivation in the Udmurt Republic. The objects of the study were 6 varieties of Trifolium pratense L. of Russian and foreign selection. On average, over 2 (2018-2019) years of research, the varieties of Trifolium pratense L. Dymkovsky and Kudesnik were distinguished by the collection of dry aboveground biomass 5.60 and 5.99 t/ha. The plant raw materials of the studied varieties of Trifolium pratense L. contained 3.5-4.1% crude fat, 1.87-2.26% nitrogen, 0.58-0.64% phosphorus, 2.57-3.10% potassium and 1.00-1.17% calcium, which allows us to consider it as a promising source of these elements. The highest content of nitrogen and calcium was observed in the Diplo and Lestris varieties, potassium - in the Dymkovsky and Kudesnik varieties, and phosphorus-in the Rannij 2 variety. The content of the flavonoids sum in terms of rutin in the studied plant samples of Trifolium pratense L. was at the level of 1.3-2.4%, the highest - in the variety of foreign selection Lestris.

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Kasatkina, Nadezhda Ivanovna, e Zhanna Sergeyevna Nelyubina. "BIOCHEMICAL CHARACTERISTICS OF TRIFOLIUM PRATENSE L. VARIETIES IN THE CONDITIONS OF THE UDMURT REPUBLIC". chemistry of plant raw material, n.º 1 (10 de março de 2022): 261–68. http://dx.doi.org/10.14258/jcprm.2022019350.

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The aim of the study was to conduct a comparative biochemical study of plant raw materials of different varieties of Trifolium pratense L. and identification of the most valuable for cultivation in the Udmurt Republic. The objects of the study were 6 varieties of Trifolium pratense L. of Russian and foreign selection. On average, over 2 (2018-2019) years of research, the varieties of Trifolium pratense L. Dymkovsky and Kudesnik were distinguished by the collection of dry aboveground biomass 5.60 and 5.99 t/ha. The plant raw materials of the studied varieties of Trifolium pratense L. contained 3.5-4.1% crude fat, 1.87-2.26% nitrogen, 0.58-0.64% phosphorus, 2.57-3.10% potassium and 1.00-1.17% calcium, which allows us to consider it as a promising source of these elements. The highest content of nitrogen and calcium was observed in the Diplo and Lestris varieties, potassium - in the Dymkovsky and Kudesnik varieties, and phosphorus-in the Rannij 2 variety. The content of the flavonoids sum in terms of rutin in the studied plant samples of Trifolium pratense L. was at the level of 1.3-2.4%, the highest - in the variety of foreign selection Lestris.

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Kokturk, Sibel, Fatma Kaya Dagistanli, Sibel Dogan, Emel Usta, Hatice Colgecen, Gamze Tanriverdi, Havva Atar e Feride Ozdemir. "The Effects of the Trifolium Pratense L. Extract on the Leukemia Inhibitory Factor and its Receptor in The Endometrial Epithelial Cell Line". Natural Product Communications 16, n.º 10 (outubro de 2021): 1934578X2110454. http://dx.doi.org/10.1177/1934578x211045467.

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Isoflavones have attracted much notice due to their health advantages; however, a comprehensive understanding of the effects of isoflavones on endometrium biology remains undiscovered. The expression and deficiency of leukemia inhibitory factor (LIF) and LIF receptor (LIFR) has been shown to be involved in multiple implantations failures in female infertility. Mechanisms implicated in the failure of implantations require further researches, thus our aim is to investigate the effect of the Trifolium pratense L. isoflavone extract with abundant formononetin content on implantation through assessing LIF and LIFR expressions. The Ishikawa cells were cultured with 20, 30, and 40 µg/mL concentrations of Trifolium pratense L. isoflavone extracts for 24 h and detected staining intensity of LIF and LIFR by immunocytochemistry and immunofluorescence staining using image analysis software. As compared with the control and 20 µg/mL Trifolium pratense L. groups, the staining intensity of LIF and LIFR in 30 and 40 µg/mL Trifolium pratense L. groups were significantly increased ( P < .0001). Our findings suggest that Trifolium pratense L. isoflavone extract may alter the endometrium expression of LIF and LIFR in the human endometrial adenocarcinoma cell line.

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Cai, Q., e M. R. Bullen. "Characterization of genomes of timothy (Phleum pratense L.). I. Karyotypes and C-banding patterns in cultivated timothy and two wild relatives". Genome 34, n.º 1 (1 de fevereiro de 1991): 52–58. http://dx.doi.org/10.1139/g91-009.

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In an attempt to know the phylogeny of timothy (Phleum pratense), the cultivated species and two wild relatives, Phleum alpinum and Phleum bertolonii, were karyotyped with conventional and Giemsa C-banding methods. In the hexaploid P. pratense (2n = 6x = 42), two sets of seven chromosomes were indistinguishable from each other both in morphology and in banding patterns and the third set of seven was found to be differentiated from them. Two genomes, A and B, were tentatively established. The banded karyotype in diploid P. alpinum (2n = 2x = 14) was close to the A genome, which was tetraploid in P. pratense, and the karyotype in P. bertolonii (2n = 2x = 14) was analogous to the B genome in P. pratense, which suggests these species were the genome donors of P. pratense.Key words: chromosome, genome, allopolyploid, Giemsa C-banding.

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Ishchenko, O., T. Derevenko e I. Panchuk. "5S rDNA of timothy- grass Phleum pratense L." Biolohichni systemy 10, n.º 2 (28 de dezembro de 2018): 107–12. http://dx.doi.org/10.31861/biosystems2018.02.107.

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Varvas, Triin, Kristina Kasekamp e Bellis Kullman. "Preliminary study of endophytic fungi in timothy (Phleum pratense) in Estonia". Acta Mycologica 48, n.º 1 (23 de dezembro de 2013): 41–49. http://dx.doi.org/10.5586/am.2013.006.

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Timothy (Phleum pratense L.) is an important agricultural grass in Europe and North America, but there is little research into the occurrence and abundance of fungal endophyte species associated with this grass. The aim of this study was to identify fungal endophytes living within P. pratense and to determine if additional moisture applied during the growing season increases the diversity of endophytic fungi. We studied 58 isolates obtained from surface-sterilised blades of 60 P. pratense plants collected from Rõka Free Air Humidity Manipulation experimental plots (FAHM), Estonia. Morphological and molecular methods were used for isolate identification. As a result, 45 strains from 10 different taxa were identified, all belonging to Ascomycota. Five species were found to be new to P. pratense.

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Tava, Aldo, Daniele Ramella, Maris Grecchi, Paolo Aceto, Renato Paoletti e Efisio Piano. "Volatile Constituents of Trifolium Pratense and T. Repens from N.E. Italian Alpine Pastures". Natural Product Communications 4, n.º 6 (junho de 2009): 1934578X0900400. http://dx.doi.org/10.1177/1934578x0900400619.

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The composition of the volatile fraction of two important forage legumes from Italian sub-alpine N.E. pastureland, namely Trifolium pratense L. subsp. pratense (red clover) and T. repens subsp. repens (white clover) were investigated. The volatile oil was obtained from the fresh aerial parts by steam distillation and analyzed by GC/FID and GC/MS. The oil yield was 0.018 and 0.021% (weight/fresh weight basis) for T. pratense and T. repens, respectively. Several classes of compounds were found in both the oils, including alcohols, aldehydes, ketones, terpenes, esters, hydrocarbons, phenolics and acids. Qualitative and quantitative differences were found.

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Nelsen, Jamie, Catherine Ulbricht, Ernie Paul Barrette, David Sollars Mac, Candy Tsouronis, Adrianne Rogers, Samuel Basch, Sadaf Hashmi, Steve Bent e Ethan Basch. "Red Clover (Trifolium pratense) Monograph". Journal of Herbal Pharmacotherapy 2, n.º 3 (janeiro de 2002): 49–72. http://dx.doi.org/10.1080/j157v02n03_06.

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Nelsen, Jamie, Catherine Ulbricht, Ernie Paul Barrette, David Sollars Mac, Candy Tsouronis, Adrianne Rogers, Samuel Basch, Sadaf Hashmi, Steve Bent e Ethan Basch. "Red Clover (Trifolium pratense) Monograph". Journal Of Herbal Pharmacotherapy 2, n.º 3 (11 de dezembro de 2002): 49–72. http://dx.doi.org/10.1300/j157v02n03_06.

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Dyshlyuk, Lyubov, Anastasiya Fedorova, Anna Loseva e Natalya Eremeeva. "Callus cultures of Thymus vulgaris and Trifolium pratense as a source of geroprotectors". Food Processing: Techniques and Technology 51, n.º 2 (15 de junho de 2021): 423–32. http://dx.doi.org/10.21603/2074-9414-2021-2-423-432.

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Introduction. Geroprotectors are biologically active substances that inhibit the aging process. Many plant species are natural geroprotectors. For instance, Thymus vulgaris and Trifolium pratense are callus cultures with strong geroprotective properties. Study objects and methods. The present research featured T. vulgaris and T. pratense grown in vitro on various nutrient media. Their extracts were obtained by aqueous-alcoholic extraction using the following parameters: water-ethanol solvent Se = 30, 50, and 70 %; temperature Te = 30, 50, and 70°C; time τe = 2, 4, and 6 h. The quantitative and qualitative analysis was based on high-performance liquid mass spectrometry, gas mass spectrometry, and thin-layer chromatography. Results and discussion. The optimal extraction parameters for T. vulgaris were τe = 4 h, Te = 50°C, Se = 70 %, for T. pratense – τe = 6 h, Te = 70°C, Se = 70 %. The chromatography detected flavonoids, phenylpropanoids, simple phenols, higher fatty acids, mono- and sesquiterpenes, and aliphatic hydrocarbons. T. vulgaris appeared to have the highest content of thymol (23.580 ± 1.170 mg/mL); its thymol, apigenin, gallic, chlorogenic, and caffeic components demonstrated geroprotective properties. The extract of T. pratense possessed the highest rutin content (10.05 ± 0.35 mg/mL), and it owed its geroprotective characteristics to rutin, chlorogenic and p-coumaric acids. Conclusion. The callus cultures of T. vulgaris and T. pratense proved to be promising sources of geroprotective biologically active substances.

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Baryła, Ryszard, e Mariusz Artur Kulik. "Ocena trwałości kilku gatunków traw i roślin motylkowatych w runi łąkowej na glebie torfowo-murszowej". Agronomy Science 63, n.º 1 (21 de março de 2008): 64–70. http://dx.doi.org/10.24326/as.2008.1.7.

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Celem badań była ocena trwałości kilku gatunków traw i roślin motylkowatych w runi łąkowej na glebie torfowo-murszowej. Badania prowadzono w latach 1996–2007 w Stacji Dydaktyczno-Badawczej w Sosnowicy na glebie torfowo-murszowej (Mt II). Przed założeniem doświadczenia dominującym gatunkiem w runi badanego kompleksu była Poa pratensis. W doświadczeniu testowano mieszanki o zróżnicowanym składzie gatunkowym. Podstawowymi gatunkami ocenianymi w badaniach były Lolium perenne, Festuca arundinacea, Phleum pratense, Dactylis glomerata, Trifolium repens i Trifolium pratense. W latach badań stosowano nawożenie w ilości: N – 40, P – 35 i K – 100 kg ha–1. W ciągu 12-letniego okresu prowadzonych badań ruń łąkowa uległa znacznym zmianom związanym ze zróżnicowanym poziomem wody gruntowej, sumami opadów i zmiennymi warunkami termicznymi w okresie wegetacyjnym w poszczególnych latach badań. Lolium perenne, Festuca arundinacea i Dactylis glomerata charakteryzowały się dużą trwałością i stabilnością udziału, ograniczając w znacznym stopniu upraszczanie się składu gatunkowego w kierunku dominacji Poa pratensis w runi łąkowej. Natomiast rośliny motylkowate (Trifolium pratense i Trifolium repens) oraz Phleum pratense były gatunkami krótkotrwałymi w badanych warunkach siedliskowych.

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Řepková, J., e J. Nedělník. "Modern methods for genetic improvement of Trifolium pratense." Czech Journal of Genetics and Plant Breeding 50, No. 2 (12 de junho de 2014): 92–99. http://dx.doi.org/10.17221/139/2013-cjgpb.

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This review focuses on trends in genetic improvement of a significant representative forage crop, Trifolium pratense (red clover) classified taxonomically into the agronomically outstanding family Fabaceae. Red clover breeding is aimed at improving traits like persistency, resistance to biotic and abiotic factors, forage yield and quality characteristics such as protein quality and stability. Isoflavone content in forage is important for cattle reproduction. Interspecific hybridization of red clover with the related wild species T. medium was used for the introgression of useful traits into red clover. The breeding strategy for the new variety Pramedi included hybrid plants with different DNA contents, repeated backcrosses with red clover, followed by family selection. New techniques of molecular genetics are becoming available to breeders for transferring key and complex traits into improved red clover varieties. Techniques such as marker-assisted selection and candidate gene identification can increase the speed and precision with which traits may be selected. Comparative sequence data analyses helped to identify genes for polyphenol oxidase enzymes and isoflavone synthase in red clover useful for DNA genotyping of individuals and breeding of improved high-quality red clover varieties.

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Dyshlyuk, Lyubov S., Maria A. Osintseva, Oksana V. Kozlova, Natalya V. Fotina e Alexander Yu Prosekov. "Antiradical and Oxidative Stress Release Properties of Trifolium pratense L. extract". Journal of Experimental Biology and Agricultural Sciences 10, n.º 4 (30 de agosto de 2022): 852–60. http://dx.doi.org/10.18006/2022.10(4).852.860.

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Low adaptive capacity and oxidative stress are the factors leading to cellular dysfunction, protein and lipid peroxidation, and the development of diseases. In recent decades, there has been a trend toward the active use of plant-based antioxidants. Trifolium pratense L. is a promising plant for the pharmaceutical and food industry and has anti-radical properties. This work is devoted to studying the antiradical and oxidative stress-released properties of T. pratense in Caenorhabditis elegans under oxidative and temperature stress. The objective of this research was to evaluate the anti-radical properties of the T. pratense extracts and individual BAS (chlorogenic acid, ononin, biochanin A, genistein) and analysis their influences on the oxidative stress of Caenorhabditis elegans in the presence of paraquat. Analysis of the antiradical properties revealed that chlorogenic acid has the maximum ability to neutralize the free radical (35.49µmol). A separate analysis of oxidative stress revealed high ononin activity at concentrations of 10, 50, and 100 µmol at 48 hours of cultivation. Biochanin A increases survival by 13.1% compared to the control. The use of the extract (500µmol) contributed to an increase in survival on day 1 of incubation. Under conditions of thermal stress, ononin (50 and 200 µmol) has a positive effect on the viability of C. elegans. The extract and BAS of T. pratense are characterized by high antiradical activity. In addition, the ability to influence the viability of C. elegans was revealed. Therefore, it is worthwhile to further study the biological properties of T. pratense for use in geroprotective therapy.

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Christie, B. R., T. M. Choo, Y. A. Papadopoulos, J. Lewis e R. Michaud. "AC Endure red clover". Canadian Journal of Plant Science 78, n.º 1 (1 de janeiro de 1998): 113–14. http://dx.doi.org/10.4141/p97-044.

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AC Endure red clover (Trifolium pratense L.) is a diploid cultivar of the double-cut type developed by mass selection at the Crop and Livestock Research Centre, Agriculture and Agri-Food Canada, Charlottetown, PEI. It is earlier flowering than Florex or Marino, and higher in forage yield, especially in the second and third harvest years. Key words: Red clover, Trifolium pratense L., cultivar description

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Choo, T. M., e B. R. Christie. "AC Kingston red clover". Canadian Journal of Plant Science 74, n.º 1 (1 de janeiro de 1994): 149–50. http://dx.doi.org/10.4141/cjps94-031.

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AC Kingston red clover (Trifolium pratense L.) is a diploid cultivar of the double-cut type developed by mass selection at the Agriculture Canada Research Station, Charlottetown, PEL It is similar to Florex in maturity, but is superior in forage yield in the second harvest year. It was selected for persistence under field conditions. Key words: Red clover, Trifolium pratense L., persistence, cultivar description

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Ciprandi, G., E. Scala e R. Ariano. "Phleum pratense molecular pattern across Italy". European Annals of Allergy and Clinical Immunology 49, n.º 04 (julho de 2017): 176. http://dx.doi.org/10.23822/eurannaci.1764-1489.01.

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Burakova, M. A., A. V. Karavaeva, I. E. Kauhova, K. N. Razaryonova e E. V. Zhokhova. "ANTIBACTERIAL ACTIVITY OF GERANIUM PRATENSE PREPARATIONS". Reviews on Clinical Pharmacology and Drug Therapy 10, n.º 2 (15 de junho de 2012): 64. http://dx.doi.org/10.17816/rcf10264.

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Kaurinovic, Biljana, Mira Popovic, Sanja Vlaisavljevic, Heidy Schwartsova e Mirjana Vojinovic-Miloradov. "Antioxidant Profile of Trifolium pratense L." Molecules 17, n.º 9 (18 de setembro de 2012): 11156–72. http://dx.doi.org/10.3390/molecules170911156.

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Tava, Aldo, Łukasz Pecio, Anna Stochmal e Luciano Pecetti. "Clovamide and Flavonoids from Leaves of Trifolium pratense and T. pratense subsp. nivale Grown in Italy". Natural Product Communications 10, n.º 6 (junho de 2015): 1934578X1501000. http://dx.doi.org/10.1177/1934578x1501000635.

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The phenolic content and composition in leaves of Trifolium pratense (red clover) and T. pratense subsp. nivale (snow clover) grown in Italy were evaluated by means of ultraperformance liquid chromatography (UPLC) coupled with photodiode array and mass spectrometry detectors. Compound identification was based on UV and MS data comparing results with those of reference compounds. Quantitative evaluation of all detected compounds was based on calibration curves obtained with available standards. Several phenolics were identified in both extracts, including clovamide, flavonols and isoflavones as their glycosilated and malonated derivatives. The total phenolic content was higher in red clover (53.7 ± 2.2 mg/g dry weight) than in snow clover (44.4 ± 4.9 mg/g dry weight). Red clover contained higher amounts of clovamide and isoflavones (15.6 ± 0.6 and 24.6 ± 1.6 mg/g dry weight, respectively) than snow clover (8.2 ± 0.1 mg/g and 16.9 ± 0.4 mg/g dry weight, respectively), while flavonols were quantified almost in the same amount in both extracts (13.2 ± 0.6 mg/g and 15.8 ± 0.6 mg/g dry weight in red clover and snow clover, respectively). Red clover was characterized by the presence of quercetin, formononetin and biochanin A derivatives as the most abundant flavonoids, whereas snow clover was characterized by higher amounts of quercetin and prunetin derivatives. This investigation, conducted for the first time on phenolics from T. pratense subsp. nivale, revealed the presence in this plant of several flavonoid derivatives the same as in T. pratense. The higher amount of prunetin in snow clover suggest a possible role of this isoflavone as a chemotaxonomic marker for this subspecies. Moreover, snow clover may represent an interesting new source of natural isoflavones with a different concentration pattern than in red clover.

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Cattanei, Luigi. "Abba e Pratesi a Pisa". Italies, n.º 6 (1 de novembro de 2002): 165–71. http://dx.doi.org/10.4000/italies.1574.

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Christie, B. R., e R. A. Martin. "Selection for persistence in red clover". Canadian Journal of Plant Science 79, n.º 3 (1 de julho de 1999): 357–59. http://dx.doi.org/10.4141/p98-068.

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To increase the persistence of red clover (Trifolium pratense L.), phenotypic recurrent selection was conducted under field conditions. After three cycles of selection, a strain designated as CRS-16, was developed. This strain has better persistence than the check cultivars, Florex and Marino, and has a more fibrous root system. Among 4-yr-old plants, about 10% initiated new shoots from below the crown. Key words: Red clover, Trifolium pratense L. persistence, root type

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Martin, R. A., B. R. Christie, Y. A. Papadopoulos e R. C. Martin. "AC Christie red clover". Canadian Journal of Plant Science 79, n.º 2 (1 de abril de 1999): 257–58. http://dx.doi.org/10.4141/p98-078.

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AC Christie red clover (Trifolium pratense L.) is a diploid cultivar of the double-cut type. It was developed by phenotypic selection at the Crop and Livestock Research Centre, Agriculture and Agri-Food Canada, Charlottetown, PEI. It is early flowering, very winterhardy and has no pubescence on the stems. In Atlantic Canada it has produced more forage than the check cultivars in the second and third harvest years. Key words: Red clover, Trifolium pratense, cultivar description

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Kocová, Valéria, Vladislav Kolarcik, Nikola Straková e Pavol Mártonfi. "Endopolyploidy Patterns in Organs of Trifolium Species (Fabaceae)". Acta Biologica Cracoviensia s. Botanica 56, n.º 1 (11 de setembro de 2014): 111–20. http://dx.doi.org/10.2478/abcsb-2014-0011.

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Abstract The pattern of endopolyploidy in the genus Trifolium was studied in mature organs of T. montanum and T. repens at reproductive stage, with comparative data for T. pratense, all from natural populations. Endopolyploidy in root, stem, petiole, leaf, inflorescence stalk, sepal, petal, stamen and carpel was detected by flow cytometry. 2C, 4C and 8C nuclei were found in organs of T. montanum and T. repens, and additionally 16C nuclei in organs of T. repens. The organs of T. montanum and T. repens differed in degree of endopolyploidy based on cycle values calculated from flow cytometry data; it was lowest in leaf and sepal in T. montanum and T. repens, and highest in T. montanum in petal and carpel and in T. repens in petiole and inflorescence stalk. These results are also seen in the two or more peaks of interphase nuclei in the flow cytometry histograms. There were significant correlations between the organs of T. pratense and T. repens as well as substantial differences between Trifolium species in the degree of endopolyploidy. T. pratense showed higher absolute endopolyploidy than T. montanum and T. repens. Principal component analysis showed that individuals of T. repens and T. montanum are more similar to each other than to individuals of T. pratense in degree of endopolyploidy. The observed variation between species might be explained by phylogenetic relationships and genome size differences.

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Michaud, R., G. Bélanger, A. Brégard e J. Surprenant. "Selection for nitrogen use efficiency and N concentration in timothy". Canadian Journal of Plant Science 78, n.º 4 (1 de outubro de 1998): 611–13. http://dx.doi.org/10.4141/p98-003.

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Improvement of N use efficiency of timothy (Phleum pratense L.) involves higher DM yield but, for feeding purposes, N concentration should also be considered. Differences in N use efficiency were found among 40 genotypes of timothy. The analysis of residues of the linear regression between N uptake and DM yield of all genotypes allowed for the selection of genotypes with both high N use efficiency and contrasted N concentrations. Key words: Phleum pratense L., timothy, genetic selection, nitrogen use efficiency

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Половникова, Марина Григорьевна, e Ольга Леонидовна Воскресенская. "Total nitrogen content in vegetative organs of lawn plants in urban environment". Herald of Tver State University. Series: Biology and Ecology, n.º 1(57) (2 de novembro de 2020): 179–86. http://dx.doi.org/10.26456/vtbio139.

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В условиях городской среды в вегетативных органах газонных растений (клевер луговой, мятлик луговой) определяли содержание общего азота. В работе использовались растения трех возрастных состояний: виргинильные (v), средневозрастные генеративные (g2) и субсенильные (ss). По мере усиления загрязнения среды и в ходе онтогенеза уменьшалось содержание общего азота в листьях и корнях газонных растений. При этом повышенное содержание общего азота в вегетативных органах было характерно для особей Trifolium pratense L. по сравнению с особями Poa pratensis L Total nitrogen content was determined in the vegetative organs of lawn plants (Trifolium pratense L., Poa pratensis L.) in the urban environment. We used plants of three age ranges: virginile (v), middle-aged generative (g2), and subsenile (ss). As pollution increased as well as during ontogenesis, the total nitrogen content in the leaves and roots of lawn plants decreased. The increased content of total nitrogen in vegetative organs was typical for individuals Trifolium pratense L. compared with individuals Poa pratensis L.

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Jankovic, Vesna, Savo Vuckovic, Vojislav Mihailovic, Vera Popovic, Ljubisa Zivanovic, Divna Simic, Ana Vujosevic e Petar Stevanovic. "Assessment of some parameters productivity and quality of populations Phleum pratense L. grown in conditions of Serbia". Genetika 50, n.º 1 (2018): 1–10. http://dx.doi.org/10.2298/gensr1801001j.

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Phleum pratense (L.) is the important forage grass species in Serbia. The study was conducted on 20 autochthonous population of Phleum pratense (L.), originating from Western Serbia. Plant height, protein content and crude cellulose content had a high direct impact on yield. Populations of PP16, PP20, PP2 and PP9 had the significantly higher yield of the raw matter compared to all the tested population and the highest values for the other evaluated parameters, also. The average yield of crude biomass was positive statistically highly significantly correlated with plant height (r=0.87**), and positively significantly correlated with a content of crude proteins and positive non significant correlated with crude cellulose (r=0.42 ns). Based on obtained values and by the appropriate choice of selection methods, we conclude that we have excellent genotypes, PP16, PP20, PP2 and PP9 for a successful selection process in order to obtain new high yielding varieties of Phleum pratense.

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Kunelius, H. T. K. "Dry matter production, fibre composition and plant characteristics of cool-season grasses under two harvest systems". Journal of Agricultural Science 115, n.º 3 (dezembro de 1990): 321–26. http://dx.doi.org/10.1017/s0021859600075730.

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SUMMARYCultivars of Phleum pratense, Festuca pratensis, Festuca arundinacea, Dactylis glomerata and Lolium × Festuca hybrids were exposed to 4- and 3-cut harvest systems in Prince Edward Island, Canada, in 1985–87. Lolium perenne × F. pratensis, Lolium multiflorum × F. pratensis and L. multiftorum × F. arundinacea hybrids and D. glomerata had more uniform growth among the harvests than other grasses during the growing season. L. perenne × F. pratensis and L. multiflorum × F. pratensis had lower contents of neutral and acid detergent fibre than other grass cultivars, particularly early in the growing season. P. pratense cv. Farol had the lowest and L. perenne × F. pratensis cv. Prior the highest tiller population density. The stem apex of all cultivars was above the cutting height of 5 cm in c. 50% of tillers of primary growth. Leaf area per tiller was largest for P. pratense cv. Farol in the primary growth stage but differences were small in subsequent cuts.

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Coulman, Bruce. "Azur red clover". Canadian Journal of Plant Science 86, n.º 3 (7 de julho de 2006): 749–50. http://dx.doi.org/10.4141/p05-198.

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Azur is a diploid cultivar of red clover [Trifolium pratense (L.)], which was selected for vigor and growth habit in the year of seeding. In forage trials conducted in Québec, Azur was superior in dry matter yield to check cultivars, particularly in trials harvested in the second production year. In trials in Ontario and the Atlantic provinces, Azur was numerically superior in dry matter yield to the check cultivar, but not significantly so (P < 0.05). Key words: Red clover, Trifolium pratense (L.), cultivar description

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NARASIMALU, P., H. T. KUNELIUS e K. B. McRAE. "THE COMPOSITION AND UTILIZATION OF SILAGE PREPARED FROM TIMOTHY (Phleum pratense L.) AND QUACKGRASS (Elytrigia repens (L.) NEOSKI)". Canadian Journal of Plant Science 69, n.º 1 (1 de janeiro de 1989): 255–58. http://dx.doi.org/10.4141/cjps89-034.

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Silages prepared from the first-cut and 7-8 wk regrowth of timothy (Phleum pratense L.) and timothy stands with 56% infestation of quackgrass (Elytrigia repens (L.) Neoski) were compared for chemical composition and for their utilization. Quackgrass infestation of timothy had no significant effect on the silage composition, and its intake and apparent digestibility in sheep. The daily retention of N was higher with the timothy-quackgrass than timothy silage (P < 0.05).Key words: Phleum pratense, Elytrigia repens, voluntary intake, apparent digestibility, nitrogen retention

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Davin, Marie, Elisa Renard, Kévin Lefébure, Marie-Laure Fauconnier e Gilles Colinet. "Temporal Evolution of PAHs Bioaccessibility in an Aged-Contaminated Soil during the Growth of Two Fabaceae". International Journal of Environmental Research and Public Health 17, n.º 11 (5 de junho de 2020): 4016. http://dx.doi.org/10.3390/ijerph17114016.

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Polycyclic aromatic hydrocarbons (PAHs) are health-concerning organic compounds that accumulate in the environment. Bioremediation and phytoremediation are studied to develop eco-friendly remediation techniques. In this study, the effects of two plants (Medicago sativa L. and Trifolium pratense L.) on the PAHs’ bioaccessibility in an aged-contaminated soil throughout a long-term rhizoremediation trial was investigated. A bioaccessibility measurement protocol, using Tenax® beads, was adapted to the studied soil. The aged-contaminated soil was cultured with each plant type and compared to unplanted soil. The bioaccessible and residual PAH contents were quantified after 3, 6 and 12 months. The PAHs’ desorption kinetics were established for 15 PAHs and described by a site distribution model. A common Tenax® extraction time (24 h) was established as a comparison basis for PAHs bioaccessibility. The rhizoremediation results show that M. sativa developed better than T. pratense on the contaminated soil. When plants were absent (control) or small (T. pratense), the global PAHs’ residual contents dissipated from the rhizosphere to 8% and 10% of the total initial content, respectively. However, in the presence of M. sativa, dissipation after 12 months was only 50% of the total initial content. Finally, the PAHs’ bioaccessible content increased more significantly in the absence of plants. This one-year trial brought no evidence that the presence of M. sativa or T. pratense on this tested aged-contaminated soil was beneficial in the PAH remediation process, compared to unplanted soil.

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Mathiesen, Svein D., e Tove H. Aagnes Utsi. "The quality of the forage eaten by Norwegian reindeer on South Georgia in summer". Rangifer 20, n.º 2-3 (1 de março de 2000): 17. http://dx.doi.org/10.7557/2.20.1.1492.

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The chemical composition and digestibility of plants selected by Norwegian reindeer (Rangifer t. tarandus) on the sub-Antarctic island of South Georgia (SG) were investigated in the austral summer and compared with two qualities of standard grasses of Phleum pratense of European origin. Paridiochola flabellata, Poa pratense, Poa annua, Deschampsia antarctka, and Phleum alpinum collected on SG contained 14.8, 17.6, 22.8, 16.1 and 10.1% respectively of crude protein of dry matter (DM). Aceana magellanica also collected on SG contained 19.8% of crude protein and 18.8% of water-soluble carbohydrates (WSC) of DM, while the tussock grass P. flabellata, contained as much as 29-3% of WSC of DM. Total plant cell-wall contents (CWC), including cellulose, hemi-cellulose and lignin in P. flabellata, P. pratense, P. annua and P. alpinum were 53.2, 49.6, 41.7 and 40.4% of DM respectively, while A. magellanica contained only 17.5% of DM CWC. The lignin concentrations of plants analysed varied between 1.2 and 3.2% of DM. Mean in vitro dry matter digestibility (IVDMD) of selected plants ranged from 70% in P. flabellata to 83% in P. alpinum after 48 h incubation in rumen fluid from these reindeer. In contrast, the IVDMD of the poor and high quality standard grass Phleum pratense were 54% and 73% of DM, respectively. The forage eaten by reindeer on SG in summer was of high quality, with low lignin content, moderate protein concentration and high degradability in rumen fluid.

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Troshkina, V. "Type specimens of names of taxa of Geranium L. (Geraniaceae) described by L. P. Sergievskaja and deposited in the Krylov Herbarium (TK)". Novitates Systematicae Plantarum Vascularium 46 (2015): 119–25. http://dx.doi.org/10.31111/novitates/2015.46.119.

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The annotated list of type specimens of names of 7 taxa of Geranium deposited in the Krylov Herbarium (TK) of Tomsk State University is given. Their type categories are indicated and original labels and protologues are cited for each specimen. Data on 21 type specimens, including 7 lectotypes, 1 isolectotype, 4 syntypes, and 9 authentic specimens, are provided. Lectotypes of names of 5 taxa are designated here: G. asiaticum Serg., G. pratense var. alpestre Krylov ex Serg., G. pratense L. f. molle Serg., G. pseudosibiricum J. Mayer var. parviflorum Serg., and G. transbaicalicum Serg.

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Bélanger, G., A. Brégard, R. Michaud e G. F. Tremblay. "Leaf and stem nutritive value of timothy genotypes under varying N fertilization". Canadian Journal of Plant Science 84, n.º 4 (1 de outubro de 2004): 1101–4. http://dx.doi.org/10.4141/p03-139.

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Populations and half-sib families of timothy (Phleum pratense L.), contrasting in forage N concentration, were studied in two experiments conducted in growth rooms with varying N applications. They differed in leaf and stem in vitro true digestibility (IVTD) of DM and in vitro cell wall digestibility (IVCWD), and in stem neutral detergent fiber (NDF) concentration; this confirms the presence of genetic variability for leaf and stem nutritive value in timothy under both limiting and non-limiting N conditions. Key words: Digestibility, grasses, Phleum pratense, neutral detergent fiber, acid detergent fiber

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Lehtonen, P., M. Helander e K. Saikkonen. "Endophyte-mediated multitrophic interactions in Lolium pratense". NZGA: Research and Practice Series 13 (1 de janeiro de 2007): 325–28. http://dx.doi.org/10.33584/rps.13.2006.3157.

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The nature of plant-endophyte relationships may be affected by the addition of interacting species. Firstly, we show how the root hemiparasitic plant (Rhinanthus serotinus) can steal defending mycotoxins produced by the symbiotic endophytic fungus (Neotyphodium uncinatum) living within their shared host grass (Lolium pratense). The uptake of defensive mycotoxins from the endophyte infected host increases resistance of the hemiparasitic plant to the aphid (Aulacorthum solani). Endophyte infection increased performance of the hemiparasite but reduced the growth of the host grass, changing the mutualistic endophytic fungus to parasitic. Secondly, we present the interactions among endophyte, host plant, aphid herbivore (Rhopalosiphum padi) and aphid transmitted grass virus (BYDV). Endophyte infection lowered the frequency of BYDV in L. pratense. The reproduction of R. padi aphids was decreased on endophyte-infected plants compared to uninfected. With these results we would like to emphasise the importance of experiments with several community members to shed light on the complexity of endophyte-mediated community interactions. Keywords: Lolium pratense, Neotyphodium uncinatum, Rhinanthus serotinus, BYDV, aphid, multitrophic interactions

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Aygün, Celalettin, e Murat Olgun. "Çayır üçgülünde (Trifolium pratense L.) karakterizasyon çalışmaları". Artvin Çoruh Üniversitesi Orman Fakültesi Dergisi 16, n.º 2 (28 de dezembro de 2015): 164. http://dx.doi.org/10.17474/acuofd.17731.

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WEXELSEN, H. "SEGREGATIONS IN RED CLOVER (TRIFOLIUM PRATENSE L.)". Hereditas 16, n.º 1-2 (9 de julho de 2010): 219–40. http://dx.doi.org/10.1111/j.1601-5223.1932.tb02569.x.

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MERKER, ARNULF. "Hybrids between Trifolium medium and Trifolium pratense". Hereditas 101, n.º 2 (28 de junho de 2008): 267–68. http://dx.doi.org/10.1111/j.1601-5223.1984.tb00927.x.

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MERKER, ARNULF. "Amphidiploids between Trifolium alpestre and Trifolium pratense". Hereditas 108, n.º 2 (14 de fevereiro de 2008): 267. http://dx.doi.org/10.1111/j.1601-5223.1988.tb00312.x.

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Berg, Björn, Michael Müller e Bengt Wessén. "Decomposition of red clover (Trifolium pratense) roots". Soil Biology and Biochemistry 19, n.º 5 (janeiro de 1987): 589–93. http://dx.doi.org/10.1016/0038-0717(87)90103-9.

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