Log in

Relevant bibliographies by topics / M. polleni / Journal articles

To see the other types of publications on this topic, follow the link: M. polleni.

Journal articles on the topic 'M. polleni'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'M. polleni.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Miralles, Aurelien, Jörn Köhler, Frank Glaw, and Miguel Vences. "A molecular phylogeny of the "Madascincus polleni species complex", with description of a new species of scincid lizard from the coastal dune area of northern Madagascar." Zootaxa 2876 (May 12, 2011): 1–16. https://doi.org/10.5281/zenodo.2845520.

Full text

Abstract:

The present paper constitutes a study on a taxonomically confusing group of closely related species belonging to the Malagasy skink genus Madascincus, currently encompassing the nominal species M. polleni, M. intermedius and M. stumpffi. Based on combined analyses of mitochondrial and nuclear DNA sequences (ND1 and RAG2 genes, respectively), and morphological examination, we provide evidence for the existence of at least four distinct evolutionary lineages within this complex: Madascincus stumpffi; Madascincus arenicola sp. nov. from northern Madagascar; and two cryptic species morphologically

APA, Harvard, Vancouver, ISO, and other styles

2

MIRALLES, AURÉLIEN, JÖRN KÖHLER, FRANK GLAW, and MIGUEL VENCES. "A molecular phylogeny of the “Madascincus polleni species complex”, with description of a new species of scincid lizard from the coastal dune area of northern Madagascar." Zootaxa 2876, no. 1 (2011): 1. http://dx.doi.org/10.11646/zootaxa.2876.1.1.

Full text

Abstract:

The present paper constitutes a study on a taxonomically confusing group of closely related species belonging to the Malagasy skink genus Madascincus, currently encompassing the nominal species M. polleni, M. intermedius and M. stumpffi. Based on combined analyses of mitochondrial and nuclear DNA sequences (ND1 and RAG2 genes, respectively), and morphological examination, we provide evidence for the existence of at least four distinct evolutionary lineages within this complex: Madascincus stumpffi; Madascincus arenicola sp. nov. from northern Madagascar; and two cryptic species morphologically

APA, Harvard, Vancouver, ISO, and other styles

3

Séverin, TCHIBOZO, and Jean Michel Maes. "Catalogue illustré des Odonates du Bénin." Revista nicaragüense de Entomología 357 (September 24, 2024): 1–541. https://doi.org/10.5281/zenodo.13834807.

Full text

Abstract:

Les 121 espèces de libellules (Odonata) recensées du Bénin sont cataloguées et illustrées. 21 espèces sont recensées formellement pour la première fois, même si quelques-unes sont déjà citées sur la page web de ADDO: <em>Lestes ochraceus, Lestes pallidus, Africallagma subtile, Agriocnemis exilis, Aeschna ephippiger, Gynacantha nigeriensis, Lestinogomphus obtusus, Paragomphus genei, Phyllogomphus occidentalis, Phyllomacromia contumax, Phyllomacromia hervei, Phyllomacromia pseudafricana, Hadrothemis camarensis, Ne

APA, Harvard, Vancouver, ISO, and other styles

4

Miralles, Aurélien, Jörn Köhler, Frank Glaw, and Miguel Vences. "Species delimitation methods put into taxonomic practice: two new Madascincus species formerly allocated to historical species names (Squamata, Scincidae)." Zoosystematics and Evolution 92, no. (2) (2016): 257–75. https://doi.org/10.3897/zse.92.9945.

Full text

Abstract:

In a previous study, Miralles and Vences (2013) compared seven different methods of species delimitation applied to the genus Madascincus. While focusing on methodological aspects their study involved an extensive data set of multilocus DNA sequences and of comparative morphology. On this basis they emphasized the need of revising the taxonomy of Madascincus, and revealed the existence of at least two well-supported candidate species. The present paper provides formal descriptions of these two taxa: (1) M. miafina sp. n., a species from dry areas of northern Madagascar, morphologically very si

APA, Harvard, Vancouver, ISO, and other styles

5

Miralles, Aurelien, Jörn Köhler, Frank Glaw, and Miguel Vences. "Species delimitation methods put into taxonomic practice: two new Madascincus species formerly allocated to historical species names (Squamata, Scincidae)." Zoosystematics and Evolution 92, no. 2 (2016): 257–75. https://doi.org/10.5281/zenodo.2845642.

Full text

Abstract:

In a previous study, Miralles & Vences (2013) compared seven different methods of species delimitation applied to the genus Madascincus. While focusing on methodological aspects their study involved an extensive data set of multilocus DNA sequences and of comparative morphology. On this basis they emphasized the need of revising the taxonomy of Madascincus, and revealed the existence of at least two well-supported candidate species. The present paper provides formal descriptions of these two taxa: (1) M. miafina sp. n., a species from dry areas of northern Madagascar, morphologically very

APA, Harvard, Vancouver, ISO, and other styles

6

V.S., Farzaliyev. "Morphological Features and Quality Indicators of the Eldar Pine Pollens Spread in Absheron Technogen Areas." Journal of Life Sciences and Biomedicine 70, no. 2 (2015): 38–45. https://doi.org/10.5281/zenodo.7422569.

Full text

Abstract:

The article was dedicated to the comparative investigation of the Morphological features and quality indicators of the Eldar pine pollens which were introduced to the Absheron condition. Objects of the investigation were male generative organs of Eldar pine collected from different parts of Absheron peninsula. Samples were collected from trees in Baku and Sumgait city parks, green areas in polluted zones and less polluted Central Botanical Garden. Eldar Pine pollen sterilization and morphological structure were studied under laboratory conditions. The JMP program tools were used for the analys

APA, Harvard, Vancouver, ISO, and other styles

7

Rathnayake, Chathurika M., Nervana Metwali, Thilina Jayarathne, et al. "Influence of rain on the abundance of bioaerosols in fine and coarse particles." Atmospheric Chemistry and Physics 17, no. 3 (2017): 2459–75. http://dx.doi.org/10.5194/acp-17-2459-2017.

Full text

Abstract:

Abstract. Assessing the environmental, health, and climate impacts of bioaerosols requires knowledge of their size and abundance. These two properties were assessed through daily measurements of chemical tracers for pollens (sucrose, fructose, and glucose), fungal spores (mannitol and glucans), and Gram-negative bacterial endotoxins in two particulate matter (PM) size modes: fine particles (< 2.5 µm) and coarse particles (2.5–10 µm) as determined by their aerodynamic diameter. Measurements were made during the spring tree pollen season (mid-April to early May) and late summer ragweed season

APA, Harvard, Vancouver, ISO, and other styles

8

DHAKAD, ASHOK, V. B. PATEL, S. K. SINGH, et al. "Pollen biology and metaxenic studies on early maturing grape (Vitis vinifera) genotypes." Indian Journal of Agricultural Sciences 94, no. 10 (2024): 1094–99. http://dx.doi.org/10.56093/ijas.v94i10.141725.

Full text

Abstract:

The present experiment was conducted during 2020–21 and 2021–22 at ICAR-Indian Agricultural Research Institute, New Delhi to study the impact of open-, self-, and cross-pollination on metaxenic traits (berries) and the incidence of cleistogamy in grapes (Vitis vinifera L.). Seven different cross-combinations were used on the grape variety Pusa Navrang, which were planted at 3 m × 3 m spacing and trained on the Y-trellis training system. The experiment was laid out in a randomized block design (RBD) with four replications. The incidence of cleistogamy, berry set, retention percentage, and the m

APA, Harvard, Vancouver, ISO, and other styles

9

Yasin, Mooner Ramadan, Mahmood Mohammed Mahmood, and Dler Jala Ramzan Sulaivani. "Investigation of Altitudinal and Longitudinal Variations of Pollen Grains of the Oak Species (The Genus Quercus L.) in Duhok Province Iraq." International Journal of Research in Science and Technology 13, no. 01 (2023): 33–39. http://dx.doi.org/10.37648/ijrst.v13i01.005.

Full text

Abstract:

Pollen grains of 3 Iraqian oak (Quercus) species belongmg to section Quercus and section cerris growing naturally in Duhok province Iraq. Three altitudinal zones (500-1000 m, 1000-1500 m, 1500-2000 m) were examined by light microscope (LM) and scanning electron microscope (SEM). The main issue focused on in this study is to determine whether oak pollens have changed dimensionally and structurally according to both different latitudes and longitudes. Based on the averages obtained from seven variables, it has been demonstrated comparative data. The mean value, range (min.-max.), and standard de

APA, Harvard, Vancouver, ISO, and other styles

10

Hamada, Trenton, Irene Terry, Robert Roemer, and Thomas E. Marler. "Potential Drift of Pollen of Cycas micronesica on the Island of Guam: A Comparative Study." HortScience 50, no. 7 (2015): 1106–17. http://dx.doi.org/10.21273/hortsci.50.7.1106.

Full text

Abstract:

We have investigated the potential movement on air currents of pollen from Guam’s native cycad, Cycas micronesica, proposed as ambophilic. We measured wind velocities and directions in different cycad habitats that vary in their exposure to trade winds, determined pollen settling velocities, and then modeled the potential horizontal pollen drift distance in each habitat. Similar measurements were performed on several entomophilous Zamia cycads and six zoophilous tropical trees used in horticulture or landscaping. All cycad species’ pollen exhibited relatively slow mean settling velocities (0.7

APA, Harvard, Vancouver, ISO, and other styles

11

Saito, Yasunori, Kentaro Ichihara, Kenzo Morishita, Kentaro Uchiyama, Fumitoshi Kobayashi, and Takayuki Tomida. "Remote Detection of the Fluorescence Spectrum of Natural Pollens Floating in the Atmosphere Using a Laser-Induced-Fluorescence Spectrum (LIFS) Lidar." Remote Sensing 10, no. 10 (2018): 1533. http://dx.doi.org/10.3390/rs10101533.

Full text

Abstract:

A mobile laser-induced fluorescence spectrum (LIFS) lidar was developed for monitoring pollens floating in the atmosphere. The fluorescence spectrum of pollens excited at 355 nm was measured with a fluorescence spectrometer and the results suggested that in general they had peaks at around 460 nm and the ranges were 400–600 nm. A fluorescence spectrum database of 25 different pollens was made with the 355 nm excitation. Based on these results, we developed a LIFS lidar that had features in pollen species identification and daytime operation. The former was achieved by the database and the latt

APA, Harvard, Vancouver, ISO, and other styles

12

Austin, Publishing Group. "Analysis of Palynological Parameters of Selected Species of Family Lamiaceae explored from District Bhimber, Azad Kashmir Pakistan." Austin Journal of Allergy 9, no. 1 (2023): 1044. https://doi.org/10.26420/austinjallergy.2023.1044.

Full text

Abstract:

Abstract <strong>Purpose:</strong> Recent research work elaborated palynological study of some selected species of family Lamiaceae which was conducted in District Bhimber, Azad Kashmir. <strong>Methods:</strong> The selected 6 species of family Lamiaceae were collected from District Bhimber. The flowers were plucked from the plants. The anthers were spaced apart and kept in a glass tube having acetic acid. The anthers were poisoned with the glass rod to set a homogeneous mixture and then purified it. Then slides were prepared and purified and add 1% safranin to stain the slides and

APA, Harvard, Vancouver, ISO, and other styles

13

Amorosi, Alessandro, Maria Luisa Colalongo, Fabio Fusco, Giancarlo Pasini, and Flavia Fiorini. "Glacio-Eustatic Control of Continental–Shallow Marine Cyclicity from Late Quaternary Deposits of the Southeastern Po Plain, Northern Italy." Quaternary Research 52, no. 1 (1999): 1–13. http://dx.doi.org/10.1006/qres.1999.2049.

Full text

Abstract:

Integrated sedimentological and micropaleontological (foraminifera, ostracods, pollens) investigations of a 173-m-long continuous core in the subsurface of the SE Po Plain reveal a cyclic facies distribution of continental to shallow-marine deposits. Radiometric and pollen data enable an age attribution of the study units to the late Middle Pleistocene–Holocene. Glacioeustasy appears to have exerted a major control on facies development, as documented by the close relationships between cyclic lithofacies patterns and the curves of eustatic fluctuation. Particularly, relative sea-level falls an

APA, Harvard, Vancouver, ISO, and other styles

14

Buschini, MLT, J. Rigon, and J. Cordeiro. "Plants used by Megachile (Moureapis) sp. (Hymenoptera: Megachilidae) in the provisioning of their nests." Brazilian Journal of Biology 69, no. 4 (2009): 1187–94. http://dx.doi.org/10.1590/s1519-69842009000500025.

Full text

Abstract:

This study was carried out in the Parque Municipal das Araucárias, located in the municipality of Guarapuava (PR) from May (06) to April (07). Its aim was to investigate which plants are used by Megachile (Moureapis) sp in provisioning of larvae, and to verify if this bee is oligolectic or polilectic. The collection of the plants was carried out during the bees activity period and in an area covering a 500 m radius from where the nests had been built. A sample of pollens from founded nests and from flowers was used to make permanent slides using the acetolysis method and with the aid of a ligh

APA, Harvard, Vancouver, ISO, and other styles

15

S. Sudarsono. "Pollen Dispersal and Pollination Patterns Studies in Pati Kopyor Coconut using Molecular Markers." CORD 31, no. 1 (2015): 15. http://dx.doi.org/10.37833/cord.v31i1.70.

Full text

Abstract:

Parentage analysis has been used to evaluate pollen dispersal in Kopyor coconut (Cocos nucifera L.). Investigations were undertaken to elucidate (i) the dispersal of pollen, (ii) the rate of self and out-crossing pollination, and (iii) the distance of pollen travel in Pati kopyor coconut population. The finding of this activities should be beneficial to kopyor coconut farmers to increase their kopyor fruit harvest and to support breeding of this unique coconut mutant. As many as 84 progenies were harvested from 15 female parents. As many as 95 adults coconut provenances surrounding the female

APA, Harvard, Vancouver, ISO, and other styles

16

Li, Bingxin, Xiu Liu, Mei Cheng, Fengxia Xu, and Haimin Liao. "Ontogeny of Different Tetrad Types in the Single Microsporangium of Mitrephora tomentosa (Annonaceae)." Diversity 15, no. 8 (2023): 898. http://dx.doi.org/10.3390/d15080898.

Full text

Abstract:

Annonaceae, comprising approximately 107 genera and 2400 species, is the largest family among early-divergent Magnoliales. Previous studies have concentrated on the binding mechanism that holds together the four members of tetrads in Annonaceae. However, the development mechanisms of different tetrad types remain largely unknown. Mitrephora tomentosa was found to exhibit five permanent tetrad types, with two or three of them existing in the same microsporangium, which is ideal for studying the formation mechanisms of different permanent tetrad pollens in a single microsporangium and explaining

APA, Harvard, Vancouver, ISO, and other styles

17

Isiaka, Sodimu. "Ecological and Economic Potential of Eucalyptus camaldulensis and Mangifera indica Trees for Sustainable Apiculture in Kaduna Northern Guinea Savannah Ecozone, Nigeria." Mbeya University of Science and Technology Journal of Research and Development 6, no. 2 (2025): 1–6. https://doi.org/10.62277/mjrd2025v6i20008.

Full text

Abstract:

Apiculture, which is the act of rearing, breeding and managing honeybee colonies in artificial hives for economic gains, leads to the production of valuable materials such as honey, bee wax, propolis, bee pollen, bee venom and royal jelly. Interest in bees started with the hunting of wild colonies in hollow cavities of trees or rocks. The ecological and economic potential of E. camaldulensis and M. indica trees for sustainable apiculture in the Kaduna Northern Guinea Savannah Ecozone, Nigeria, was studied. 10 Kenya top bar hives were randomly placed in each of the plantations with 95% dominanc

APA, Harvard, Vancouver, ISO, and other styles

18

Ghramh, Hamed A., and Khalid Ali Khan. "Honey Bees Prefer Pollen Substitutes Rich in Protein Content Located at Short Distance from the Apiary." Animals 13, no. 5 (2023): 885. http://dx.doi.org/10.3390/ani13050885.

Full text

Abstract:

The availability of floral resources is crucial for honey bee colonies because it allows them to obtain protein from pollen and carbohydrates from nectar; typically, they consume these nutrients in the form of bee bread, which has undergone fermentation. However, the intensification of agriculture, urbanization, changes to the topography, and harsh environmental conditions are currently impacting foraging sites due to habitat loss and scarcity of food resources. Thus, this study aimed to assess honey bee preference for various pollen substitute diet compositions. Bee colonies perform poorly be

APA, Harvard, Vancouver, ISO, and other styles

19

Denise M. D. S. Mouga, Gabriel R. Schroeder, Nilton P. Vieira Junior, and Enderlei Dec. "Pollen characterization of ornamental species of Mammillaria Haw. (Cactaceae/Cactoideae)." Acta Biológica Catarinense 6, no. 1 (2019): 13–19. http://dx.doi.org/10.21726/abc.v6i1.205.

Full text

Abstract:

The pollen morphology of thirteen species of Cactaceae was studied: M. backebergiana F.G. Buchenau, M. decipiens Scheidw, M. elongata DC, M. gracilis Pfeiff., M. hahniana Werderm., M. marksiana Krainz, M. matudae Bravo, M. nejapensis R.T. Craig & E.Y. Dawson, M. nivosa Link ex Pfeiff., M. plumosa F.A.C. Weber, M. prolifera (Mill.) Haw, M. spinosissima var. “A Peak” Lem. and M. voburnensis Scheer. All analysed pollen grains are monads, with radial symmetry, medium size (M. gracilis, M. marksiana, M. prolifera, large), tricolpates (dimorphs in M. plumosa [3-6 colpus] and M. prolifera [3-6 co

APA, Harvard, Vancouver, ISO, and other styles

20

Mouga, Denise M. D. S., Gabriel R. Schroeder, Nilton P. Vieira Junior, and Enderlei Dec. "Pollen characterization of ornamental species of Mammillaria Haw. (Cactaceae/Cactoideae)." Acta Biológica Catarinense 6, no. 1 (2019): 13. http://dx.doi.org/10.21726/abc.v6i1.732.

Full text

Abstract:

The pollen morphology of thirteen species of Cactaceae was studied: M. backebergiana F.G. Buchenau, M. decipiens Scheidw, M. elongata DC, M. gracilis Pfeiff., M. hahniana Werderm., M. marksiana Krainz, M. matudae Bravo, M. nejapensis R.T. Craig & E.Y. Dawson, M. nivosa Link ex Pfeiff., M. plumosa F.A.C. Weber, M. prolifera (Mill.) Haw, M. spinosissima var. “A Peak” Lem. and M. voburnensis Scheer. All analysed pollen grains are monads, with radial symmetry, medium size (M. gracilis, M. marksiana, M. prolifera, large), tricolpates (dimorphs in M. plumosa [3-6 colpus] and M. prolifera [3-6 co

APA, Harvard, Vancouver, ISO, and other styles

21

Jiang, Weiwen, Marie-José Battesti, Yin Yang, et al. "Melissopalynological Analysis of Honey from French Guiana." Foods 13, no. 7 (2024): 1073. http://dx.doi.org/10.3390/foods13071073.

Full text

Abstract:

Beekeeping directly depends on the floral biodiversity available to honey bees. In tropical regions, where nectar and pollen resources are numerous, the botanical origin of some honey is still under discussion. A precise knowledge of plants foraged by honey bees is useful to understand and certify the botanical origin of honey. In this study, attention was paid to honey samples from the French Guiana Atlantic coast where beekeepers generally place their hives in four types of biotopes: seaside vegetation, mangrove, savannah, and secondary forest. Pollen analysis of 87 honey samples enabled the

APA, Harvard, Vancouver, ISO, and other styles

22

Vojnich, Viktor, Orsolya Udvardy, Dóra Kajtor-Apatini, et al. "Pollen concentration of invasive tree of heaven (Ailanthus altissima) on the Northern Great Plain, Hungary." Acta herbologica 31, no. 1 (2022): 43–52. http://dx.doi.org/10.5937/actaherb2201043v.

Full text

Abstract:

In areas where the tree of heaven (Ailanthus altissima) appears and multiplies, the original vegetation degrades and transforms. The invasive tree of heaven is also of great importance in urban environments, where it causes building damage, static problems and endangers utilities. Ailanthus pollen concentration was measured during the 3-year period (2016-2018) at three county capitals (Szolnok, Debrecen, Nyíregyháza) of the Northern Great Plain, Hungary (JászNagykun-Szolnok county, Hajdú-Bihar county and Szabolcs-Szatmár-Bereg county), with a 7-day Hirst-type (Burkard) pollen trap. The highest

APA, Harvard, Vancouver, ISO, and other styles

23

Argue, Charles L. "Some taxonomic implications of pollen and seed morphology in Mimulus hymenophyllus and M. jungermannioides and comparisons with other putative members of the M. moschatus alliance (Scrophulariaceae)." Canadian Journal of Botany 64, no. 7 (1986): 1331–37. http://dx.doi.org/10.1139/b86-183.

Full text

Abstract:

Statistically significant differences in pollen and seed size confirm the distinctness of Mimulus hymenophyllus and M. jungermannioides and distinguish M. hymenophyllus from all other members of the M. moschatus alliance. Published descriptions of morphological differences in the seeds of M. jungermannioides, M. patulus, and M. washingtonensis are not confirmed. The pollen evidence is consistent with a segregation of M. moniliformis from M. moschatus but fails to support a previously reported difference in exine sculpturing between M. moschatus and M. inodorus. Other taxonomic implications of

APA, Harvard, Vancouver, ISO, and other styles

24

Zhygalova, Svitlana L., Oksana A. Futorna, and Anatoliy Levanets. "Micromorphological study (ultrastructure of lamina surface, seeds, ultrasculpture of pollen grains) of Gladiolus L. species (Iridaceae Juss.) of Ukrainian flora." Environmental & Socio-economic Studies 2, no. 4 (2014): 21–27. http://dx.doi.org/10.1515/environ-2015-0046.

Full text

Abstract:

Abstract Micro-morphological characteristics of the four Gladiolus L. species of the Ukrainian flora (G. imbricatus L., G. italicus Mill., G. palustris Gaudin and G. tenuis M. Bieb.) as regards leaves, seeds and pollens are presented with this investigation in a detailed way. An examination of the surface structure of the leaves, seeds and pollen grains of the Gladiolus species indicates that the characteristics of the ultrastructure of leaves and of pollen grains are not diagnostic for distinguishing species, but they could be important at genus level (leaves: features such as being amphistom

APA, Harvard, Vancouver, ISO, and other styles

25

Leite, Wellerson Picanço, Ana Cristina Andrade Aguiar-Dias, Alina Fierro-Freire, Cláudia Barbieri Ferreira Mendonça, and Vania Gonçalves-Esteves. "Pollen diversity in Brazilian species of Monnina (Polygalaceae)." Phytotaxa 220, no. 2 (2015): 117. http://dx.doi.org/10.11646/phytotaxa.220.2.2.

Full text

Abstract:

Monnina is subordinated to the Polygalaceae family, which consists of 19 genera and approximately 1300 species widely distributed throughout the continents. The current study aims to characterize pollen grains in the genera to provide the basis for their taxonomy. Thus, 13 species were analyzed: subg. Monninopsis (M. insignis and M. malmeana), subg. Pterocayra (M. cardiocarpa, M. cuneata, M. dictyocarpa, M. exalata, M. goiana, M. itapoanensis, M. oblongifolia, M. resedoides, M. richardiana, M. stenophylla, M. tristaniana). The shape of the species widely varied: M. insignis and M. malmeana sho

APA, Harvard, Vancouver, ISO, and other styles

26

Calderón LLosa, Oscar Manuel, Denisse Cevallos Levicek, Germán Ramón, et al. "Initial study of trap and identification of environmental pollens and fungi spores in Samborondon, Ecuador." Revista Alergia México 71, no. 1 (2024): 52. http://dx.doi.org/10.29262/ram.v71i1.1322.

Full text

Abstract:

Initial study of trap and identification of environmental pollens and fungi spores in Samborondon, Ecuador Introduction: The identification of local aeroallergens in any geographical area is essential for the specific diagnosis and treatment of allergic diseases. Our objective was to identify and registry the most important aeroallergens trapped at the aerobiology station in the city of Samborondon, Ecuador.Material and methods:Pollen grains and fungal spore counts were performed according to the standardized technique with a Hirst-type collection equipment, Burkard spore trap for seven days,

APA, Harvard, Vancouver, ISO, and other styles

27

Baskorowati, Liliana. "STIGMA RECEPTIVITY AND POLLEN VIABILITY OF Melaleuca alternifolia." JOURNAL OF FORESTRY RESEARCH 6, no. 1 (2009): 26–37. https://doi.org/10.20886/ijfr.2009.6.1.26-37.

Full text

Abstract:

Stigma  receptivity based on seed set and pollen  tubes growth  following controlled pollination of flowers  of different  ages was examined  in <em>Melaleuca alternifolia</em>. The stigma secretion during 10 days after anthesis and pollen viability under three different temperatures and five storage times were also observed<em>. </em>These series of research were undertaken because successful controlled pollination of <em>M. alternifolia </em>depends on the application of viable pollen to the receptive compatible  stigma. The objective of this research was t

APA, Harvard, Vancouver, ISO, and other styles

28

Fortescue, J. A., and D. W. Turner. "Pollen fertility in Musa: Viability in cultivars grown in Southern Australia." Australian Journal of Agricultural Research 55, no. 10 (2004): 1085. http://dx.doi.org/10.1071/ar04078.

Full text

Abstract:

Pollen viability was examined by recording the number of viable as well as non-viable microspores in anthers just before anthesis, as it could be an efficient and rapid indicator of female fertility. It was thought that competency in meiotic restitution in microspores could indicate similar competency in megaspores. Pollen fertility was compared among seeded diploids and edible triploids of Musa and correlated with ovule fertility. Viability was examined using the Alexander’s pollen stain procedure. The seeded diploid species M. acuminata, M. balbisiana, and M. ornata had 3 times more viable p

APA, Harvard, Vancouver, ISO, and other styles

29

Al-Azzazy, Mahmoud M., and Saleh S. Alhewairini. "Effects of different diets on life table parameters of the predatory mite Phytoseius plumifer (Acari: Phytoseiidae)." Acarologia 64, no. 4 (2024): 1019–29. http://dx.doi.org/10.24349/hwu2-v0ct.

Full text

Abstract:

The predatory mite Phytoseius plumifer (Canestrini and Fanzago) (Acari: Phytoseiidae) is an effective predator of phytophagous mites in several countries worldwide. Plant pollen is an important alternative food for generalist predatory mites, ensuring survival and fostering population growth during periods of prey scarcity. The objective of this study was to compare the effects of a diet of a natural prey, Oligonychus afrasiaticus (McGregor 1939) (Acari: Tetranychidae), and a diet of pollens, e.g. corn pollen or date palm pollen, on P. plumifer life table parameters under laboratory conditions

APA, Harvard, Vancouver, ISO, and other styles

30

Çetin, Ergü, Cansev Yildirim, Narçin Palavan-Ünsal, and Meral Ünal. "Effect of spermine and cyclohexylamine on in vitro pollen germination and tube growth in Helianthus annuus." Canadian Journal of Plant Science 80, no. 2 (2000): 241–45. http://dx.doi.org/10.4141/p99-097.

Full text

Abstract:

Naturally occurring polyamines (PA) are known to play a key role in growth and development of plants and animals. However, the role of these polycations in the development and germination of the pollen grain is not well understood. The effect of different concentrations of spermine (Spm) on pollen tube growth in Helianthus annuus was investigated. Spermine treatments in the 10−7 to 10−5 M range stimulated pollen tube growth starting in the first 15 min of the incubation period, while 10−4 M Spm treatment resulted in inhibition of pollen tube elongation. The effect of cyclohexylamine (CHA), an

APA, Harvard, Vancouver, ISO, and other styles

31

Briceno Noriega, Daniela Briceno, Huub F. J. Savelkoul, Ad Jansen, Malgorzata Teodorowicz, and Janneke Ruinemans-Koerts. "Pollen Sensitization Can Increase the Allergic Reaction to Non-Cross-Reactive Allergens in a Soy-Allergic Patient." International Journal of Environmental Research and Public Health 20, no. 11 (2023): 6045. http://dx.doi.org/10.3390/ijerph20116045.

Full text

Abstract:

During and after the pollen season, an increase in food-triggered allergic symptoms has been observed in pollen-food syndrome patients, possibly due to seasonal boosting of pollen-IgE levels. It has been suggested that consumption of birch-pollen-related foods plays a role in seasonal allergenic inflammation. However, whether this increased pollen sensitization during the pollen season can also affect the allergenicity of allergens that are non-cross-reactive with birch pollen remains in question. This study presents the case of a patient with soy allergy and pollinosis, who experiences worsen

APA, Harvard, Vancouver, ISO, and other styles

32

Nikolic, Dragan, Dragan Milatovic, Aleksandar Radovic, and Jugoslav Trajkovic. "Distinguishing Oblacinska sour cherry clones (Prunus cerasus L.) by pollen morphology." Genetika 52, no. 1 (2020): 187–98. http://dx.doi.org/10.2298/gensr2001187n.

Full text

Abstract:

Morphology and ultrastructure of pollen grains were studied in 13 Obla?inska sour cherry clones in three years using scanning electron microscopy (SEM). All studied clones had isopolar, radially symmetric and tricolpate pollen grains. Length and width of pollen grains varied in a range of 50.03-55.97 ?m and 25.16-28.37 ?m respectively. Pollen shape in all the studied clones was identified as prolate. The smallest colpus length was found in the clone 8 (43.73 ?m), and the highest in the clone 3 (49.16 ?m). The highest colpus and mesocolpium width had the clone 3 (1.73 ?m; 14.87 ?m) and the lowe

APA, Harvard, Vancouver, ISO, and other styles

33

da Silva Correia, Francisco Cildomar, and Rui Carlos Peruquetti. "Pollen niche of Melipona crinita Moure & Kerr, 1950 (Hymenoptera: Apidae) in a meliponary of Acre, Brazil: a study case." REVISTA CHILENA DE ENTOMOLOGÍA 49, no. 2 (2023): 237–54. http://dx.doi.org/10.35249/rche.49.2.23.04.

Full text

Abstract:

Melipona crinita is widely used in meliponiculture for the production of honey, in several places in the Amazon. Thus, the aim of this study was: (i) determine the seasonal characteristics of the pollen collected by M. crinita, regarding the botanical origin; (ii) the growth habit of plants visited by workers and (iii) the contribution of wild and agricultural species in providing pollen for this bee. Our hypotheses were: (i) M. crinita is a generalist species in the use of its pollen sources; (ii) M. crinita adjusts pollen foraging according to flowering variation and (iii) M. crinita visits

APA, Harvard, Vancouver, ISO, and other styles

34

Vasil'chuk, Alla Constantinovna. "Pollen spectra in Holocene ice wedges in the floodplain of the Lyakkatosyo River (Eastern Yamal, Russia)." Арктика и Антарктика, no. 2 (February 2024): 33–56. http://dx.doi.org/10.7256/2453-8922.2024.2.71146.

Full text

Abstract:

Study considers horizontal and vertical sampling directions for pollen analysis of ice wedges, taking into account the special mechanism of wedge ice formation. Pollen spectra from the Late Holocene ice-wedges on high polygonal floodplain of the Lyakkatosyo River are studied. Shrub-lichen-moss-polygonal tundra dominates the site. We accounted for the number of elementary veins. The main research methods are pollen and geochemical analyses. We collected samples for pollen analysis along ice wedges' axis and horizontally at depth of 1.20 m, while we also took samples for chemical analysis along

APA, Harvard, Vancouver, ISO, and other styles

35

Cortez, Priscila Andressa, Sandra Maria Carmello-Guerreiro, and Simone Pádua Teixeira. "Understanding male sterility in Miconia species (Melastomataceae): a morphological approach." Australian Journal of Botany 60, no. 6 (2012): 506. http://dx.doi.org/10.1071/bt12076.

Full text

Abstract:

Pollen abortion occurs in virtually all species and often does not prejudice reproductive success. However, large numbers of abnormal pollen grains are characteristic of some groups. Among them is Miconia, in which partial and complete male sterility is often related to apomixis. In this study, we compared the morphology of pollen grains over several developmental stages in Miconia species with different rates of male sterility. Our aim was to improve the knowledge of mechanisms that lead to male sterility in this ecologically important tropical group. Routine techniques for microscopy were us

APA, Harvard, Vancouver, ISO, and other styles

36

Djafri-Bouallag, Linda, Malika Ourari, and Mohamed Sahnoune. "A cytogenetic and pollen study of annual Medicago species from Soummam Valley (Northeastern of Algeria)." Acta Botanica Croatica 78, no. 1 (2019): 82–90. http://dx.doi.org/10.2478/botcro-2019-0010.

Full text

Abstract:

Abstract This paper reports a cytogenetic study of eight Medicago L. species sampled from the Soummam Valley (northeastern Algeria). Chromosome numbers and meiosis irregularities during microsporogenesis were explored. Pollen viability rate and pollen size were also examined. The studied taxa are diploid and display biva-lent pairing and regular chromosome segregation during meiosis. Although meiosis appears regular, some anomalies were detected in relatively high cumulated rates (14.66%–26.14%). The most common meiotic abnormality examined here is related to cytomixis (from 14.66% in M. litto

APA, Harvard, Vancouver, ISO, and other styles

37

Eisen, Anna-Katharina, Barbara Fussi, Branko Šikoparija, and Susanne Jochner-Oette. "Aerobiological Pollen Deposition and Transport of Fraxinus excelsior L. at a Small Spatial Scale." Forests 13, no. 3 (2022): 424. http://dx.doi.org/10.3390/f13030424.

Full text

Abstract:

The ongoing fragmentation of ash populations due to ash dieback requires an effective gene flow between individuals; thus, investigations on ash pollen transport are essential. In this study, comprehensive aerobiological field experiments at two seed plantations in Baden-Württemberg were conducted in 2019 and 2020 in order to study the influence of phenology and meteorology (especially wind) on pollen transport using self-constructed gravimetric pollen traps located 1.5 and 5 m a.g.l. Our main objectives were to investigate the local scale dispersion of ash pollen and to evaluate the recommend

APA, Harvard, Vancouver, ISO, and other styles

38

Кobzar, V. "Aeropalinological monitoring in the mountain-sea resort." Bulletin of Science and Practice 5, no. 1 (2019): 33–43. https://doi.org/10.5281/zenodo.2539549.

Full text

Abstract:

Cholpon–Ata as a mountain–sea resort attracts tourists from all over the world. But his visit by patients with pollinosis has certain difficulties, due to the lack of a pollen monitoring system in Kyrgyzstan as a whole and specifically at the resort. Based on this, the purpose of the present study: to conduct aeropalynological monitoring at the mountain and sea resort of Cholpon–Ata and compare the performance of aeroallergens at the level of human breathing (1.5 m above the ground) and on the roof of a one-story building (height 8 m). The aeropaeniological curve in Chol

APA, Harvard, Vancouver, ISO, and other styles

39

Mulugeta, Dawit, Bruce D. Maxwell, Peter K. Fay, and William E. Dyer. "Kochia (Kochia scoparia) Pollen Dispersion, Viability and Germination." Weed Science 42, no. 4 (1994): 548–52. http://dx.doi.org/10.1017/s004317450007692x.

Full text

Abstract:

Kochia pollen dispersion was measured during 24 and 48 h periods from a kochia population in an 8- by 10-m area in the center of a 1.6 ha fallow field. Pollen counts from traps at 50- and 100-cm heights declined rapidly with increasing distance from the pollen source. Pollen deposition was highest along the prevailing wind direction: up to 23 pollen grains cm–2were recovered 50 m from the pollen source along the southeast (SE) vector. Nonlinear regression analysis of pollen deposition along the SE vector was used to estimate that 99.9% of shed pollen would be deposited within 154.4 m of the so

APA, Harvard, Vancouver, ISO, and other styles

40

Fotiric-Aksic, Milica, Radosav Cerovic, Vera Rakonjac, Ivana Bakic, Slavica Colic, and Mekjell Meland. "Vitality and in vitro pollen germination of different ‘Oblacinska’ sour cherry clones." Genetika 49, no. 3 (2017): 791–800. http://dx.doi.org/10.2298/gensr1703791a.

Full text

Abstract:

Vitality of pollen, in vitro pollen germination and pollen tube growth (pollen tube length and pollen tube growth rate) were investigated in Oblacinska sour cherry in order to determine the differences between clones which have divergent yielding potential. For this purpose two ?Oblacinska? sour cherry clones with high fruit set and high yields (II/2, III/9) and two with low fruit set and low-yielding (XI/3 and XIII/1) were used in this study. Pollen germination was done on artificial medium containing 14% sucrose and 0.3% agar-agar at room temperature (23?C). Pollen tube growth was stopped wi

APA, Harvard, Vancouver, ISO, and other styles

41

Suryani, Lilis, and Fitria Ramona. "Pollen morphological ultrastructure of Melastoma L. (Melastomataceae)." Jurnal Biologi UNAND 8, no. 1 (2020): 9. http://dx.doi.org/10.25077/jbioua.8.1.9-13.2020.

Full text

Abstract:

Melastoma L. is a type genus of Melastomataceae. Melastoma malabthricum is the type with the widest area of spread compared with other species in the genus Melastoma. This research aim to study pollen morphological ultrastructure of Melastoma. Research carried out with collecting species which include to Melastoma with survey methode. Pollen morphological ultrastructure observation used Scanning Electron Microscope Type JSM-IT-200. Pollen sample obtained from the flowers collection where not yet anthesis. In Laboratory polen was fixation, dehidration and coating then observed with electrone mi

APA, Harvard, Vancouver, ISO, and other styles

42

PRATAMA, I. PUTU NARKA EKA, NI LUH WATINIASIH, and I. KETUT GINANTRA. "THE EFFECT OF DIFFERENT ALTITUDE TO THE POLLEN TYPES THAT TRIGONA COLLECTED." Jurnal Biologi Udayana 22, no. 1 (2018): 42. http://dx.doi.org/10.24843/jbiounud.2018.v22.i01.p06.

Full text

Abstract:

Trigona is a stingless bee, which has been found in tropical and sub-tropical regions. Fifty species have been indentified in South East Asian region, but few studies have been conducted in Indonesia. Plant species commonly differ in different altitudes, due to the climatic effect, therefore will affect the availability of food source for Trigona. This study aimed to investigate the effect of different altitudes to the pollen types collected and used by Trigona as food resources and the distance of their foraging. Samples of Trigona were collected from 3 locations: Location I was in Mawang and

APA, Harvard, Vancouver, ISO, and other styles

43

Konwar, Surajeet, Dharitree Deka, Aandrisha Borthakur, and Bijoy Neog. "A Study on Pollen Morphology and Viability of Certain Members of Cucurbitaceae Family." South Asian Journal of Experimental Biology 14, no. 1 (2024): 21–30. http://dx.doi.org/10.38150/sajeb.14(1).p21-30.

Full text

Abstract:

Characterizing the shape of pollen is crucial for plant breeding, taxonomy, and conservation, and studies on pollen viability can help breeding initiatives. This study examined the male fertility and pollen morphology of six Cucurbitaceae species with potential for both economic and nutritional benefit. Pollen grains were acetolyzed for morphological study, and a light compound microscope and an LEICA digital microscope were used to determine the exine stratification as well as other characteristics of pollen grains. The Cucurbitaceae family is eurypalynous, as evidenced by the noticeable diff

APA, Harvard, Vancouver, ISO, and other styles

44

Souza, Rogério Ribeiro de, Alyne Daniele Alves Pimentel, Lizandra Ludgerio Nogueira, Vanessa Holanda Righetti de Abreu, and Jaílson Santos de Novais. "Resources Collected by two Melipona Illiger, 1806 (Apidae: Meliponini) Species Based on Pollen Spectrum of Honeys from the Amazon Basin." Sociobiology 67, no. 2 (2020): 268. http://dx.doi.org/10.13102/sociobiology.v67i2.4617.

Full text

Abstract:

This study aimed to identify the pollen grains found in honeys of Melipona (Michmelia) seminigra pernigra Moure & Kerr and Melipona (Melikerria) interrupta Latreille in two communities of the Tapajós-Arapiuns Extractive Reserve, Lower Amazon (Pará, Brazil) between December 2016 and November 2017. Twenty-four samples of honey were processed, 12 samples from M. seminigra pernigra collected in the Suruacá community and 12 samples from M. interrupta in the Vila Franca community. After acetolysis, 103 pollen types were identified, distributed across 22 families, plus eight indeterminate types.

APA, Harvard, Vancouver, ISO, and other styles

45

Zimny, Janusz, Sławomir Sowa, Piotr Otręba та ін. "Pollen Flow of Winter Triticale (x Triticosecale Wittmack) Investigated with Transgenic Line Expressing β-Glucuronidase Gene". Agronomy 11, № 3 (2021): 431. http://dx.doi.org/10.3390/agronomy11030431.

Full text

Abstract:

A transgenic winter triticale line expressing the uidA gene, encoding β-glucuronidase, was used to assess the pollen flow in field experiments over two consecutive vegetation seasons in central Poland. The experimental design included two variants of mixed transgenic and non-transgenic lines. Pollen grains were collected using passive traps located at 0, 10, 30, 60 and 85 m from the transgenic line. GM pollen grains were detected histochemically by staining with x-Gluc. A positive effect of temperature increase, as well as the strength and direction of the wind on the number and spread of poll

APA, Harvard, Vancouver, ISO, and other styles

46

Zhang, Binghuang, Xiao Lan, Shengchang Yang, and Ma Hui. "Mixed Mating System, Dispersal Limitation Shape, and Spatial Genetic Structure of Tamarix chinensis on Isolated Wudi Seashell Island." Diversity 17, no. 4 (2025): 285. https://doi.org/10.3390/d17040285.

Full text

Abstract:

Tamarix chinensis Lour. is a halophytic shrub native to coastal China, commonly used in afforestation and ecological restoration due to its high tolerance to salinity and drought. To understand how this species maintains genetic variation and adapts to extreme environments, we examined the genetic diversity, mating system, and spatial genetic structure of a natural T. chinensis population on the geographically isolated and environmentally harsh Wudi Seashell Island. Using both SSR and ISSR markers, we observed high levels of genetic diversity despite the small population size and spatial fragm

APA, Harvard, Vancouver, ISO, and other styles

47

Wörl, Verena, Johanna Jetschni, and Susanne Jochner-Oette. "Birch Pollen Deposition and Transport along an Altitudinal Gradient in the Bavarian Alps—A Case Study Using Gravimetric Pollen Traps in the Pollen Season 2020." Atmosphere 13, no. 12 (2022): 2007. http://dx.doi.org/10.3390/atmos13122007.

Full text

Abstract:

There is only little and partially contradicting knowledge on the variation of pollen abundance at different altitudes in mountainous regions. The aim of this work is to gain new insights on the influence of wind and surrounding trees on the deposition and transport of birch (Betula spec.) pollen in the Bavarian Alps, Germany. Data on birch pollen deposition were collected at five sites using gravimetric traps along an altitudinal gradient from Garmisch-Partenkirchen (720 m a.s.l.) to the Environmental Research Station Schneefernerhaus (2650 m a.s.l) in the pollen season 2020. We compared thes

APA, Harvard, Vancouver, ISO, and other styles

48

S, PAVITHRA, DHANANJAYA M. V, SUJATHA A. NAIR, et al. "Studies on pollen viability in Jasminum spp." Indian Journal of Agricultural Sciences 88, no. 12 (2018): 1864–68. http://dx.doi.org/10.56093/ijas.v88i12.85438.

Full text

Abstract:

In vitro studies on pollen viability of six jasmine species, viz. Jasminum sambac, J. auriculatum, J. grandiflorum, J. multiflorum, J. flexile and J. malabaricum, was conducted at ICAR-Indian Institute of Horticultural Research, Hesaraghatta Lake Post, Bengaluru during 2016-17. Results revealed that species Jasminum malabaricum recorded highest pollen viability (96.57%) as well as pollen germination (91.58%) followed by J. flexile (84.92% and 81.86%, respectively) and J. auriculatum (71.32% and 71.08%, respectively) under in vitro condition. The species J. sambac significantly recorded lowest

APA, Harvard, Vancouver, ISO, and other styles

49

S., O. Lashuk. "Evaluation of breeding material on the basis of morphological and cytological characteristics of the reproductive organs of plants of the genus Miscanthus." Plant varieties studying and protection 19, no. 3 (2023): 148–54. https://doi.org/10.21498/2518-1017.19.3.2023.287638.

Full text

Abstract:

<strong>Purpose</strong>. To study in vitro the morphological and cytological characteristics of anthers, pollen and pistils of plants of the genus Miscanthus. <strong>Methods</strong>. Preparations of pistils, unpollinated seed buds, anthers and pollen, unstained or stained with a solution of carmine (2%) in acetic acid (45%) or methylene blue solution, were examined by light microscopy. Measurements for plants of different Miscanthus species, as well as counting the number of pollen of different diameters, were made in ten replicates. <strong>Results</strong>. The morphological and cytologic

APA, Harvard, Vancouver, ISO, and other styles

50

Rajbhandary, Sangeeta, Mark Hughes, and Krishna K. Shrestha. "Pollen morphology of Begonia L. (Begoniaceae) in Nepal." Bangladesh Journal of Plant Taxonomy 19, no. 2 (2012): 191–200. http://dx.doi.org/10.3329/bjpt.v19i2.13134.

Full text

Abstract:

The pollen morphology of 28 Begonia species of Nepal has been examined by scanning electron microscopy (SEM). Comparative pollen analysis was made based on size, shape in polar and equatorial views, P/E ratio, aperture, and exine ornamentation. In this study, four types of pollen ornamentation morphology have been identified. Among Nepalese Begonia, B. roxburghii (section Sphenanthera) has the smallest pollen (11.2- 12.8 × 6.4-7.0 ?m) and B. flagellaris (section Diploclinium) has the largest pollen (24.3- 30.6 × 11.4-12.0 ?m). Presence of margo in the pollen ornamentation is a distinguishing c

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!