Relevant bibliographies by topics / Sunflower (Helianthus annuus)

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Sunflower (Helianthus annuus)'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Sunflower (Helianthus annuus)"

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Makarenko, Maksim, Alexander Usatov, Tatiana Tatarinova, et al. "The Investigation of Perennial Sunflower Species (Helianthus L.) Mitochondrial Genomes." Genes 11, no. 9 (2020): 982. http://dx.doi.org/10.3390/genes11090982.

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The genus Helianthus is a diverse taxonomic group with approximately 50 species. Most sunflower genomic investigations are devoted to economically valuable species, e.g., H. annuus, while other Helianthus species, especially perennial, are predominantly a blind spot. In the current study, we have assembled the complete mitogenomes of two perennial species: H. grosseserratus (273,543 bp) and H. strumosus (281,055 bp). We analyzed their sequences and gene profiles in comparison to the available complete mitogenomes of H. annuus. Except for sdh4 and trnA-UGC, both perennial sunflower species had the same gene content and almost identical protein-coding sequences when compared with each other and with annual sunflowers (H. annuus). Common mitochondrial open reading frames (ORFs) (orf117, orf139, and orf334) in sunflowers and unique ORFs for H. grosseserratus (orf633) and H. strumosus (orf126, orf184, orf207) were identified. The maintenance of plastid-derived coding sequences in the mitogenomes of both annual and perennial sunflowers and the low frequency of nonsynonymous mutations point at an extremely low variability of mitochondrial DNA (mtDNA) coding sequences in the Helianthus genus.
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Lewis, Derek W., and Robert H. Gulden. "Effect of Kochia (Kochia scoparia) Interference on Sunflower (Helianthus annuus) Yield." Weed Science 62, no. 1 (2014): 158–65. http://dx.doi.org/10.1614/ws-d-13-00069.1.

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Kochia is a weed found in many sunflower fields across the Northern Great Plains. There is limited information about the ability of sunflower plants to compete with kochia, specifically when the weed grows both in the crop row and in the inter-row space, as in zero tillage systems that rely solely on herbicides to manage weeds. An experiment was conducted over seven site–yr, from 2009 to 2011, to determine the effect of kochia density and relative time of kochia seedling recruitment on sunflower growth and development, yield and seed quality. Kochia seed was broadcast on the soil surface at six densities, into sunflowers planted in 75-cm rows, either at the same time as the sunflower crop was planted (early weed seedling recruitment), or when the sunflowers were at the four-leaf stage (late weed seedling recruitment). When kochia plants emerged at the same time as the sunflowers, yield was reduced by up to 76% and sunflower head diam was reduced in four site–yr, stem diam was reduced in three site–yr, height was reduced in two site–yr and the number of leaves per sunflower plant was reduced in two site–yr The 5% action threshold for early emerging kochia was four kochia plants m−2in the combined site–yr analysis. Additionally, early recruiting kochia seedlings reduced sunflower seed size and seed weight at two and three site–yr, respectively. Kochia plants that emerged after the four-leaf stage of the sunflower crop did not affect sunflower growth and development, yield, or seed quality. To reduce the potential for yield and seed quality losses, sunflower growers should be proactive with respect to managing kochia in sunflowers, particularly when the kochia plants emerge at about the same time as the sunflowers.
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Nikolova, Liudmila, Pepa Shindrova, and Valentina Entcheva. "RESISTANCE TO DISEASES, OBTAINED THROUGH INTERSPECIFIC HYBRIDIZATION / RESISTENCIA A LAS ENFERMEDADES OBTENIDA POR LA HIBRIDIZACION INTERSPECIES / RÉSISTANCE À LA MALADIE OBTENUE PAR HYBRIDATION INTERSPECIES." helia 23, no. 33 (2000): 57–64. http://dx.doi.org/10.1515/helia.2000.23.33.57.

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SUMMARY Two accessions of the wild species Helianthus annuus L., GT-E-112 and GT-E-126, carried genes for resistance to Plasmopara helianthi Novot., Phomopsis helianthi Munt.-Cvet. et al. and Orobanche cumana Wallr. The material produced by interspecific hybridization with susceptible cultivated sunflower showed resistance to the three pathogens. Some progenies were resistant to two pathogens simultaneously. Self pollination helped to increase the percentage of resistance up to 100%. Accessions GT-E-112 and GT-E-126 of the wild species Helianthus annuus could be successfully used as donors for resistance to Plasmopara helianthi, Phomopsis helianthi and Orobanche cumana.
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Kostenkova, E. V., and A. S. Bushnev. "Helianthus annuus L. hybrid ideotype." TAURIDA HERALD OF THE AGRARIAN SCIENCES 2(26) (August 3, 2021): 116–26. http://dx.doi.org/10.33952/2542-0720-2021-2-26-116-126.

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The issue of determining the ideotype of sunflower varieties and hybrids is relevant not only for breeding but also for cultivation in new environmental conditions. The aim of our research was to evaluate the genotypes according to ecological adaptability and establish the parameters of the sunflower ideotype for the arid conditions of the Crimean steppe zone. The studies were conducted in 2017-2020 at the Field Crop Department, FSBSI “Research Institute of Agriculture of Crimea” (village of Klepinino). Soil – chernozem southern low humus. Materials for the research – sunflower hybrids: ‘Garant’, ‘Komandor’, ‘Signal’, ‘Paritet’, ‘Prestizh’ (standard), ‘Sprint’, ‘Sprint 2’, ‘Gorstar’, ‘Kometa’ (bred in the All-Russian Scientific Research Institute of Oil Crops by the name of Pustovoit V.S.” (VNIIMK)). The experiment was replicated four times. The total area of the trial plot is 56 m2, the accounting area – 28 m2. Plant density – 40 thousand plants per ha. The harvest was brought to 100% purity; the seeds – to 10% moisture content. The linear regression coefficient (plasticity) of the yield of hybrids (bi) and the standard deviation (stability) (Ϭd2) were calculated according to S. A. Eberhart and W. A. Russell. Favourable weather conditions were in 2017 (Ij = +0.21) and 2019 (Ij = +1.04). Hybrids ‘Komandor’, ‘Garant’, ‘Sprint 2’ and ‘Gorstar’ are more responsive to the improvement of growing conditions (bi>1); variety ‘Kometa’ – weakly responsive (bi<1). When cultivation conditions changed, the yield of the hybrids ‘Signal’, ‘Paritet’, ‘Prestizh’ and ‘Sprint’ varied (bi = 1). In terms of yield, the most stable is ‘Kometa’ (Ϭd2 = 0.48); the most unstable – ‘Komandor’ (Ϭd2 = 2.19). According to the long-term field research, we have identified the parameters of the optimal model of a sunflower hybrid for cultivation in the Crimea: growing season length – 92–98 days, plant height – 161–166 cm, 1000-seeds weight – 69.5–83.0 g, productive area of the capitula (flower head) – 313–379 cm2, yield – 2.26–2.49 t/ha, oil content – 45–47%, as well as god responsiveness to the growing conditions improvement.
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Prasifka, Jarrad R. "Variation in the number of capitate glandular trichomes in wild and cultivated sunflower germplasm and its potential for use in host plant resistance." Plant Genetic Resources 13, no. 1 (2014): 68–74. http://dx.doi.org/10.1017/s1479262114000653.

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The capitate glandular trichomes of wild sunflowers (Helianthus spp.) are considered to be effective defence components that act against some herbivorous insects, but cultivated sunflowers are reportedly deficient in glandular trichomes. To investigate whether glandular trichomes have a role in the protection of cultivated sunflowers against insects, in the present study, Helianthus annuus L. accessions were grown to quantify glandular trichome density in wild and cultivated germplasm types and assess potential anti-insect effects of terpenoids in the glandular trichomes of cultivated sunflowers. Evaluation revealed that capitate glandular trichomes are often abundant in cultivated sunflowers; relative to wild H. annuus, inbred maintainer (HA) lines have similar numbers of glandular trichomes per floret, while commercial hybrids have only ≈ 20% fewer trichomes when compared with wild sunflowers. In the laboratory assay, it was found that glandular trichome extracts increased the mortality rates of sunflower moth, Homoeosoma electellum (Hulst), larvae exposed from the neonatal stage to 9 d. In the surviving larvae, the extracts significantly reduced larval mass and head capsule width. Though there are limitations to the value of glandular trichomes for host plant resistance, the feeding deterrent or toxic effects of sesquiterpene lactones and diterpenes in sunflower glandular trichomes are not limited to sunflower moth larvae, suggesting a potential for resistance to other sunflower insect pests. Additional research is required to understand the inheritance and value of glandular trichomes in commercial sunflower germplasm and how the composition of terpenoids in the glandular trichomes of wild H. annuus may differ from that in cultivated material.
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Tan, Ahmet Semsettin, and Yalcin Kaya. "Sunflower (Helianthus annuus L.) genetic resources, production and researches in Turkey." OCL 26 (2019): 21. http://dx.doi.org/10.1051/ocl/2019004.

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Sunflower is one of the leading oilseed crops and it is widely grown in the Thrace region of Turkey. In 2017, in Turkey as a whole, oilseed and confectionary sunflowers were grown on 779.622 ha with a total production of 1 964 385 t of seed, and average yields of 2.64 t ha−1 for oilseed and 1.67 t ha−1 for confectionary types. Turkey is one of the important countries for crop diversity and has been described as a microcenter for some crops, which originated in different parts of the world. Landraces of sunflower (Helianthus annuus L.) show significant diversity in Turkey and have been collected in the framework of the “National Industrial Plant Genetic Resources Project” (NPGRP). Nine hundred and thirty two oilseed and confectionary sunflower accessions are in longterm conservation in the National Seed Gene Bank of Turkey. The mission of the National Sunflower Research Project is to develop improved germplasm and hybrid varieties by conventional and biotechnical breeding techniques in Turkey. New germplasm and breeding lines have been developed to improve oilseed and confectionary sunflower hybrids with desired characters including high yield and oil quality, resistance to diseases such as: Plasmopara halstedii (Farl.) Berl de Toni., Puccinia helianthi Schw., and Orobanche cumana Walr. Adverse conditions are also taken under consideration. These studies are integrated with agronomic and other related research.
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Durgan, Beverly R., Alan G. Dexter, and Stephen D. Miller. "Kochia (Kochia scoparia) Interference in Sunflower (Helianthus annuus)." Weed Technology 4, no. 1 (1990): 52–56. http://dx.doi.org/10.1017/s0890037x00024970.

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Field experiments were conducted in 1983 and 1984 at two locations to determine the influence of various densities and durations of kochia interference in sunflower. Sunflower achene yield and dry weight were reduced by all densities of kochia, averaged over locations and years. Season-long competition by kochia densities of 0.3, 1, 3, and 6 plants/m of row decreased sunflower achene yield 7, 10, 20, and 27%, respectively. Sunflower achene yield and sunflower dry weight decreased as weeks of kochia competition increased. Only 2 weeks of kochia competition after sunflower emergence decreased sunflower achene yield 6%. Sunflower achene yield loss increased as the duration of kochia competition increased. Sunflower 200 achene weight, oil content, and plant height were not influenced by various densities or durations of kochia competition.
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GUBBELS, G. H., and W. DEDIO. "YIELD AND SEED QUALITY OF SUNFLOWER HYBRIDS IN RESPONSE TO A PAIRED-ROW SEEDING PATTERN." Canadian Journal of Plant Science 69, no. 4 (1989): 1255–57. http://dx.doi.org/10.4141/cjps89-148.

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Four oilseed sunflower (Helianthus annuus L.) hybrids, varying widely in growth habit, were grown with rows uniformly spaced at 45 cm and in a paired-row arrangement, alternating 30 cm with 60 cm, in 1986 and 1987 at Morden, Manitoba. Soil moisture conditions were adequate in both seasons. There were no significant differences in achene yield between the row spacing treatments.Key words: Sunflower, Helianthus annuus L., row spacing, paired rows
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GUBBELS, G. H., and W. DEDIO. "RESPONSE OF SUNFLOWER HYBRIDS TO ROW SPACING." Canadian Journal of Plant Science 68, no. 4 (1988): 1125–27. http://dx.doi.org/10.4141/cjps88-134.

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An early- and a late-maturing oilseed sunflower (Helianthus annuus L.) hybrid were grown at 45- and 90-cm row spacings in the 1984 to 1986 seasons at Morden, Manitoba. In the 45-cm rows compared to the 90-cm rows, plant height was reduced approximately 9 cm, and achene yield was increased 14.5% for the early hybrid. Response of the late hybrid to row spacing was minimal.Key words: Oilseed sunflower, Helianthus annuus L., row spacing
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Wall, David A. "Sunflower (Helianthus annuus L) tolerance to sublethal doses of imazethapyr." Canadian Journal of Plant Science 76, no. 4 (1996): 937–40. http://dx.doi.org/10.4141/cjps96-157.

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Field experiments were conducted from 1992 to 1995 at Morden, Manitoba to investigate the tolerance of sunflower to sublethal doses of imazethapyr {2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acid). Imazethapyr was applied at 0, 0.375, 0.75, 1.5, 3, and 6 g a.i. ha−1 plus a nonionic surfactant at 0.25% vol/vol when sunflowers were in the six-leaf stage. Dosages higher than 1.5 g ha−1 severely injured sunflowers in some years. Injury symptoms consisted of chlorosis, stunting and seed head deformities. At the dosages tested, imazethapyr reduced sunflower yields in only 1 of 4 yr. In 1994, dosages greater than 1.5 g ha−1 reduced achene yields by 19–38%. Seed oil content was reduced in 2 of 4 yr. At 6 g ha−1 of imazethapyr seed oil content was reduced by as much as 3.2 percentage points compared with the untreated check. While low dosages of imazethapyr may not reduce yields in most years, the potential for severe yield losses and reduced oil contents exist and caution should be used when applying imazethapyr in fields next to sunflowers. Key words: Crop injury, herbicide drift, yield, oil content
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Dissertations / Theses on the topic "Sunflower (Helianthus annuus)"

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Fageiry, K. A. "Studies on weed control in sunflower (Helianthus annuus L.)." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262591.

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Konov, Alexei. "Studies on sunflower (helianthus annuus l. ) transformation and regeneration." Université Louis Pasteur (Strasbourg) (1971-2008), 1998. http://www.theses.fr/1998STR13062.

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Ce memoire presente des etudes de transformation et de regeneration du tournesol (helianthus annuus l. ), l'une des plantes oleagineuses les plus importantes dans le monde. La seule technique de transformation fiable jusqu'a present (transformation par agrobacterium de fragments d'apex de pousses, suivie de la formation de pousses a partir de meristemes primaires) demeure encore problematique avec les genotypes facilement disponibles (ha300b ou peredovik, par exemple). Nos travaux sur plus de 10. 000 explants de ces genotypes ont fourni plusieurs pousses gus-positives et mis en evidence un certain nombre de blocages. Nous avons modifie certains parametres (blessure directe par les particules des tissus cibles avant la coculture, plus grande selectivite sur milieu additionne de kanamycine). La diminution de la dominance apicale et la greffe des pousses in vitro nous ont permis d'obtenir une plante transgenique fertile a partir du genotype ha300b. La faible efficacite de la methode peut venir (1) de la faible efficacite du transfert de gene aux apex de pousses, entrainant une expression chimerique et une selection difficile des tissus transformes sur un milieu contenant de la kanamycine ; (2) du faible taux de regeneration et, en consequence, de la faible probabilite de regenerer des pousses transformees. Nous avons donc etudie en detail l'induction de bourgeons epiphylles et la regeneration de pousses (cinetique, conditions de culture) aux niveaux morphologique, cytologique et histologique. Nous avons mis au point un protocole pour la formation de multiples pousses a partir de feuilles isolees en culture. Nous avons demontre pour la premiere fois une nette correlation entre l'action d'une cytokinine dans l'induction de morphogenese de novo et l'expression des genes homeobox knotted1 durant cette induction. Un systeme de transformation fiable du tournesol serait important pour mieux comprendre ce phenomene. Nos resultats sur l'expression transitoire de uida dans des feuilles isolees, apres transfert de gene par l'agrobacterium, montrent que ce systeme peut etre utilise de maniere comparable a la methode de transformation des disques foliaires. Cependant, il demande encore l'ajustement precis des parametres experimentaux pour le protocole de regeneration.
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Laver, Hilary Kathleen. "Molecular basis of cytoplasmic male sterility in Helianthus annuus (sunflower)." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/11036.

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Khalaf, I. T. "Tissue nutrient content and yield of sunflower (Helianthus annuus. L.)." Thesis, University of Manchester, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374574.

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Rodrigues, ClÃcio da Frota. "System intercropped of sunflower, string bean and peanuts in series replacement." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14539.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior
The cultural intercrop is about sowing two or more species in the same area, in a way that one of the species manages to live by the other during all or at least part of its cycle. The aim of this paper is to evaluate the grain and pod production and their components, the sunflower cultures cv. CATISSOL with cowpea cv. âSetentÃoâ and peanut cv. PI 165 317, belonging to the âSpanishâ group intercropped in replacing series. The study was developed from April to July, 2010, in a farm named âLavoura Secaâ, located in QuixadÃ, CearÃ, Brazil. The research profile was the one in random blocks of 9 treatments. For the sunflower studies, it was used 7 treatments and 4 repetitions, whereas for the cowpea and peanut study, it was used 4 treatments and 4 repetitions. For the monocultures, the portions were made of 6 five-meter rows, whereas for the intercropped cultures, th e portions were made of 12 five-meter rows.The treatments were about the monoculture of sunflower (GI100%), cowpea (FE100%), peanut (AM100%) and intercrop between these cultures where the plant populations varied in the following proportions: GI75% + FE25%; GI50% + FE50%; GI25% + FE75%; GI75% + AM25%: GI50% + AM50%; GI25% + AM75%. The monoculture results were superior to the intercropped ones. For the intercrop of cowpea, the biggest productivity of sunflower achenes happened in the association 75% sunflower + 25% cowpea. For the intercrop between sunflower and peanut, the peanut presence in the proportion of 25% plant population did not affect the result productivity of sunflower achenes in relation to the monoculture. The components of peanut production, pod number, pod weight, amount of seeds for each pod, seed weight for each pod, and the weight of 100 seeds, were not affected by different proportions of peanut and sunflower intercrop. The intercropped systems showed the Land Efficient Use superior to 1 (one) in the plant population proportion GI75%+FE25%, GI50%+FE50%, GI75%+AM25% e GI25%+AM75%, meaning that different intercropped arrangements are more advantageous than monocultures.
O consÃrcio de culturas consiste na semeadura de duas ou mais espÃcies na mesma Ãrea, de modo que uma das espÃcies conviva com a outra, em todo ou em pelo menos parte de seu ciclo. O objetivo deste trabalho foi avaliar a produÃÃo de grÃos e vagens e seus componentes, das culturas de girassol cv. CATISSOL com feijÃo-de-corda cv. SetentÃo e amendoim cv. PI 165 317 pertencente ao grupo âSpanishâ consorciadas em sÃrie de substituiÃÃo. O estudo foi conduzido no perÃodo de abril a julho de 2010, na Fazenda Lavoura Seca localizada em QuixadÃ-CearÃ, Brasil. O delineamento utilizado foi o de blocos ao acaso constando de 9 tratamentos. Para o estudo do comportamento do girassol foram utilizados 7 tratamentos e quatro repetiÃÃes, jà para o estudo do feijÃo-de-corda e amendoim foram 4 tratamentos e quatro repetiÃÃes. Para as culturas em monocultivo as parcelas foram constituÃdas de 6 fileiras de 5 metros, para as culturas em consÃrcio as parcelas foram constituÃdas de 12 fileiras de 5 metros. Os tratamentos consistiram do monocultivo do girassol (GI100%), fejÃo-de-corda (FE100%), amendoim (AM100%) e combinaÃÃes de consÃrcio entre essas culturas onde as populaÃÃes de plantas variaram nas proporÃÃes seguintes: GI75% + FE25%; GI50% + FE50%; GI25% + FE75%; GI75% + AM25%: GI50% + AM50%; GI25% + AM75%. Os rendimentos das culturas em monocultivo estudadas foram superiores aos consÃrcios. No consÃrcio com feijÃo-de-corda a maior produÃÃo de aquÃnios de girassol ocorreu na associaÃÃo 75% girassol + 25% feijÃo-de-corda. No consÃrcio girassol + amendoim, a presenÃa de amendoim na proporÃÃo de populaÃÃo de plantas de 25% nÃo afetou a produtividade de aquÃnios de girassol em relaÃÃo ao monocultivo. Os componentes da produÃÃo do amendoim, nÃmero de vagem, peso de vagem, nÃmero de sementes por vagens, peso de sementes por vagens e peso de 100 sementes, nÃo foram afetados pelas diferentes proporÃÃes de amendoim e girassol em consÃrcio. Os sistemas de consÃrcio apresentaram o Uso Eficiente da Terra superior a 1 (um) nas proporÃÃes de populaÃÃo de plantas GI75%+FE25%, GI50%+FE50%, GI75%+AM25% e GI25%+AM75%, significando vantagem nos diferentes arranjos do consÃrcio sobre o monocultivo.
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Holmes, Lisa. "The role of ethylene in shoot gravitropism in sunflower (Helianthus annuus)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ31353.pdf.

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Gomes, Evandro Machado. "Parametros basicos para a irrigação sistematica do girassol (Helianthus annuus L.)." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258197.

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Orientador: Dirceu Brasil Vieira
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo
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Resumo: O ensaio foi conduzido nos anos de 2001 a 2003, em duas áreas experimentais: Campo de Pesquisa Hidroagrícola do Pinhal - Unicamp e no Horto Municipal Florestal, ambos no município de Limeira - SP, Brasil, com o objetivo de estudar o efeito da irrigação, sobre alguns parâmetros do girassol (Helianthus annuus L.), cultivar M-742. As semeaduras e colheitas foram realizadas, respectivamente, nos dias 18 de junho e 14 de setembro de 2001, 16 de junho e 8 de outubro de 2002 e 24 de junho e 15 de outubro de 2003. O delineamento experimental foi o de blocos casualizados com três tratamentos e quatro repetições. Os três tratamentos consistiram de: 1)irrigação de acordo com o balanço de umidade no solo (Sempre Irrigado); 2) irrigado nos períodos críticos do desenvolvimento, ou seja, formação de botão floral e enchimento de grãos (Irrigado nas Fases) e 3) sem suplementação hídrica (Sem Irrigação). A irrigação foi realizada por sistema de aspersão convencional, conduzida pelo método gravimétrico. Os principais parâmetros analisados foram: altura de planta, diâmetro do capítulo, peso do capítulo, peso da haste, peso das folhas, peso de mil sementes, teor de óleo e proteína de grãos, produção, distribuição do sistema radicular e demanda hídrica da cultura. Os dados foram submetidos à análise de variância e suas médias comparadas pelo teste de Tukey. Pelos resultados obtidos e para as condições do experimento, as seguintes conclusões se evidenciaram como as mais importantes: a) a planta desenvolvida sob marcante estresse hídrico tende a produzir raÍzes em maior número e se aprofundar mais no solo que aquela sem restrição hídrica; b) há maior concentração de raÍzes no horizonte superficial do solo, até 20 centímetros, independentemente da disponibilidade de água. c) a irrigação nas fases de formação do botão floral e de enchimento de grãos é suficiente para garantir níveis de desenvolvimento da planta e do sistema radicular bem como produção de grãos semelhantes à da planta desenvolvida sem restrição Hídrica; d) ocorre acentuada diminuição na massa seca de haste, capítulo e folha como conseqüência do estresse Hídrico; e) plantas desenvolvidas sob marcante estresse Hídrico produziram cerca de 30% menos em peso de grãos que as Sempre Irrigadas e 20% menos que as Irrigadas nas Fases; t) a redução da área foliar, através da redução na altura da planta, mostrou-se como um dos mecanismos de resposta do girassol à escassez de água; g) a planta sob restrição Hídrica tende a produzir um maior teor de proteína em detrimento da produção de lipídeos; h) o kc encontrado mostrou os menores valores aproximadamente aos 20 dias após a emergência, atingindo os valores mais elevados na fase de formação do botão floral (45-50 dias após a emergência)
Abstract: The study was conducted from 2001 to 2003, in Limeira (Brazil), with the sunflower hybrid M-742. The aim of the present work was to study the effect of the supplementary irrigation on some sunflower (Helianthus annuus L.) parameters. The sowing and harvest were done, respectively in June 18, September 14 in 2001; June 16, October 8 in 2002 and June 24, October 15 in 2003. The experimental design was a randomized blocks with three treatments and four replications. The treatments were: a) irrigation according to soil moisture (Always Irrigated); b) irrigation in the critical periods (Phases Irrigated) and c) without supplementary irrigation (Rainfed). The irrigation was performed by sprinkler and scheduled by gravimetric method. The main analyzed parameters were: head, leaves and stem dry weight and height; 1.000 seed mass; head diameter; oil and protein content; root system distribution; water demand. The data were submitted to analysis of variance and the averages were compared by Tukey test. Based upon the results some conc1usions are feasible: a) sunflower plants under sever water stress produces a higher root number that explore the soil deeply than plants with no water stress; b) the greater root concentration occurred in the superficial horizon, for all treatments. c) water supplementation during flower bud formation and grain filling stages is sufficient to assure good levels of grain yield and root system development; d) the water Stress causes an emphasize decrease in stem, head and leave dry mass; e) plants grown under accentuate water stress yielded 30% less than plants with no stress and 20% less than plants that received water only in the critical periods of bud formation and grain filling; f) the leaf area decrease through the plants height appears to be a mechanism of sunflower's defense to water stress; g) the sunflower under water stress increases protein and reduces oil seed content; h) the kc coefficient was lower at 20 days after emergence and higher at flower bud stage
Doutorado
Recursos Hidricos
Doutor em Engenharia Civil
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Wessels, Abraham Albertus. "Extraction of Helianthus Annuus (sunflower) oil with supercritical carbon dioxide / Albert Wessels." Thesis, North-West University, 2004. http://hdl.handle.net/10394/603.

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The principal objective of this study was to extract sunflower (Helianthus annuus) oil from seed with supercritical carbon dioxide (sc-C02) as an alternative to the cold-press method and subsequent 3-stage refining of the acquired crude oil. Extractions were performed on laboratory scale with a commercially available supercritical fluid extractor of the latest design. A minimum number of extraction runs based on a statistical design was performed to establish the conditions (time, pressure, temperature) required for a maximum yield of oil by virtue of surface response analysis and kinetic yield-versus-time data fitting. Several additional extraction runs were performed at randomly selected conditions to properly reveal the temperature, pressure and density dependence of the extraction process and thereby elucidate its mechanism. The physical appearance, chemical quality and composition of the sc-C02 derived sunflower oil were evaluated against the crude and refined oil obtained by the cold-press method as well as a standard specification for commercial sunflower oil. This evaluation was done by chemical analysis performed in the quality control laboratory of a commercial sunflower oil supplier and by GC and GC-MS analysis of samples of both sc-C02 and cold-press obtained sunflower oil. It was concluded that sunflower oil of a superior quality can be obtained by sc-CO2 extraction, especially when de-hulled seed is used to minimise the wax content of the extract. Extraction runs were performed on seed with natural moisture content as well as on oven-dried, freeze-dried and sun-dried seed in order to establish the crucial role played by moisture content as a yield-determining factor. Preliminary results of up scaling on a supercritical pilot-plant suggest that sc-C02 extraction of sunflower oil could be performed on industrial scale should an extruder based continuous feed mechanism and a viable process of de-hulling of seed be implemented.
Thesis (M.Sc. (Pharmaceutical Chemistry))--North-West University, Potchefstroom Campus, 2005.
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Kgatle, Mahlane Godfrey. "Pathogenic seed-borne, small-spored Alternaria spp. on sunflower (Helianthus annuus L)." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/30928.

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Sunflower (Helianthus annuus L.) is the most important oilseed crop in South Africa at present and is grown in all summer rainfall areas. Sunflower seed oil is preferred over soybean and rapeseed oil because of its high quality and high poly-unsaturated fatty acids content that helps avoid the accumulation of cholesterol in the blood (Ward et al., 1985). A field trip was taken to sunflower fields in Greytown, Northern Kwa-Zulu Natal in early March 2010 during the warm and rainy summer season. Alternaria helianthicola Rao and Rajagopalan was consistently isolated from diseased plant material. Alternaria helianthicola has not previously been recorded on sunflower in South Africa. The pathogenicity of was A. helianthicola confirmed on sunflower plants using Koch’s postulates. Standard germination and seed health tests were conducted for thirteen sunflower seed lots from various sunflowers farms and companies of South Africa. Germination percentages ranged from 60 to 94% and germinated seedlings of the thirteen seed lots often showed seedling blight. Seed infection ranged from 18 to 98% caused by various small-spored Alternariaspecies. Seed infection did not severely influence seed germination and the Alternaria species may either cause a quiescent infection of the seeds or theAlternaria species may be mere saprobes and contaminants of the seed coats that do not cause disease. Seed component plating tests showed that the Alternaria species were more prevalent in the embryo and cotyledon than on the seed coats. Morphological characterization of these small-spored Alternaria species has been found to be unreliable due to the overlap in cultural characteristics between the various species. Molecular characterization using the rDNA ITS operon, β-tubulin gene and the EF-1α gene was done to support the morphological characterization. The rDNA ITS operon showed extensive length polymorphism among the Alternaria species that did not allow proper molecular identification of the isolates. The in vitro test showed that A. helianthicola had an optimum growth temperature of 25°C and maximum temperature of 35°C. Light was observed to promote hyphal growth increasing the radial growth rate of the fungus. In in vivo tests, approximately 12 hours of continuous high RH was required for infection to progress at optimal temperatures. Temperature had a significant effect on infection, with lesion development and enlargement observed to increase from 20 to 30°C, declining at 35°C.
Dissertation (MSc)--University of Pretoria, 2013.
Microbiology and Plant Pathology
MSc
Unrestricted
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Grassa, Christopher J. "The first reference genome of sunflower (Helianthus annuus L.) : a domesticated compilospecies." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52882.

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I present the first reference genome for sunflower, Helianthus annuus. The reference is 3.6 billion base pairs long and is divided into seventeen lines of text representing the DNA of sunflower’s seventeen chromosomes. This reference was constructed via DNA sequencing and assembly of sunflower line HA412, physical mapping using a sequence-based barcoding approach, and genetic mapping based on low coverage DNA sequencing of a highly polymorphic mapping population. I also assembled and annotated a reference genome of sunflower’s mitochondrial genome. Sunflower and its wild relatives are a useful system for studying ecology and evolution. Helianthus annuus may be regarded as a natural compilospecies; adaptive introgressive hybridization with related species has facilitated the expansion of its range over a variety of soils and climates. In addition, the compatibility of sunflower with its extremophile wild relatives offers the opportunity to breed environmentally resilient sunflower cultivars that can cope with global climate change. The resource described in this thesis will be a useful tool for evolutionary biologists and crop breeders with interests pertaining to sunflower genetics.
Science, Faculty of
Botany, Department of
Graduate
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More sources

Books on the topic "Sunflower (Helianthus annuus)"

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Phillimon-Banda, Mackson Henrie. Quantitative studies of production traits in sunflower (Helianthus annuus L.). University of Birmingham, 1999.

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Holtom, Martin John. The polygenic inheritance of agronomic characters in the sunflower (helianthus annuus). University of Birmingham, 1991.

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Jurat, Roswitha. Einfluss von Schwefeldioxid und Ozon auf den Mineralstoffhaushalt von Helianthus annuus L. Wissenschafts-Verlag Dr. W. Maraun, 1990.

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José Arturo de Juan Valero. Dinámica del crecimiento y desarrollo del girasol oleaginoso (Helianthus annuus L.): Primeras observaciones sobre ocho variedades cultivadas de girasol rastrojero en el regadío de Albacete. Ediciones de la Universidad de Castilla-La Mancha, 1992.

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Schuster, Walter. Die Züchtung der Sonnenblume (Helianthus annuus L.). Paul Parey Scientific Publishers, 1993.

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Gedil, Melaku Ayele. Marker development, genome mapping, and cloning of candidate disease resistance genes in sunflower, Helianthus annuus L. 1999.

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Cheres, Mercy Tuiya. Selecting donor inbred lines for enhancing the performance of single-cross hybrids from key heterotic groups of oilseed sunflower (Helianthus annuus L.). 1998.

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Smith, Elaine D. Ozone flux in Helianthus annuus (L.). 1985.

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Book chapters on the topic "Sunflower (Helianthus annuus)"

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Sastry, K. Subramanya, Bikash Mandal, John Hammond, S. W. Scott, and R. W. Briddon. "Helianthus annuus (Sunflower)." In Encyclopedia of Plant Viruses and Viroids. Springer India, 2019. http://dx.doi.org/10.1007/978-81-322-3912-3_441.

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Radonic, Laura M., Dalia M. Lewi, Nilda E. López, H. Esteban Hopp, Alejandro S. Escandón, and Marisa López Bilbao. "Sunflower (Helianthus annuus L.)." In Methods in Molecular Biology. Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-1658-0_5.

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Khurana, Sakshi, and Ravinder Singh. "Sunflower (Helianthus annuus) Seed." In Oilseeds: Health Attributes and Food Applications. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4194-0_5.

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Pugliesi, C., M. Fambrini, and A. Cavallini. "Transgenic Sunflower (Helianthus annuus)." In Transgenic Crops I. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-59612-4_20.

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Nwokolo, E. "Sunflower(Helianthus annuus L.)." In Food and Feed from Legumes and Oilseeds. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0433-3_28.

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Cavallini, A., and M. C. Lupi. "Micropropagation of Sunflower (Helianthus annuus L.)." In High-Tech and Micropropagation III. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-662-07770-2_32.

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Schrammeijer, B., A. Hoekema, and P. C. Sijmons. "Transformation in Helianthus annuus L. (Sunflower)." In Plant Protoplasts and Genetic Engineering III. Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78006-6_19.

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Hewezi, T., G. Alibert, and J. Kallerhoff. "Genetic Transformation of Sunflower (Helianthus Annuus L.)." In Transgenic Crops of the World. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2333-0_32.

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Bohorova, N. E., and A. I. Atanassov. "Sunflower (Helianthus annuus L.): In Vitro Interspecific Hybridization." In Biotechnology in Agriculture and Forestry. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-74448-8_21.

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Rauf, Saeed. "Breeding Strategies for Sunflower (Helianthus annuus L.) Genetic Improvement." In Advances in Plant Breeding Strategies: Industrial and Food Crops. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23265-8_16.

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Conference papers on the topic "Sunflower (Helianthus annuus)"

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Bredeson, Mike M. "Neonicotinoids in sunflower (Helianthus annuus) extra-floral nectar: How are beneficial insects affected?" In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.114890.

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Kusmiati, Endah Budi Ningsih, Indriati Ramadhani, and Mellova Amir. "Antibacterial and antioxidant activity test of crude lutein extracted from sunflower (Helianthus annuus L.)." In THE 2ND SCIENCE AND MATHEMATICS INTERNATIONAL CONFERENCE (SMIC 2020): Transforming Research and Education of Science and Mathematics in the Digital Age. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0041594.

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Kostenkova, E. V., and A. S. Bushnev. "Variety testing of Helianthus annuus L. of domestic selection under conditions of the steppe zone of the Crimea." In РАЦИОНАЛЬНОЕ ИСПОЛЬЗОВАНИЕ ПРИРОДНЫХ РЕСУРСОВ В АГРОЦЕНОЗАХ. Federal State Budget Scientific Institution “Research Institute of Agriculture of Crimea”, 2020. http://dx.doi.org/10.33952/2542-0720-15.05.2020.29.

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In 2019, in a single-factor experiment, two varieties of confectionery sunflower were studied in four-fold repetition: ‘SPK’ (control) and ‘Belochka’, as well as two oilseed varieties: ‘Umnik’ (control) and ‘VNIIMK 100’. The plot area is 56 m2, the registered area is 28 m2. The standing density is 30 thousand plants per ha. Climatic conditions in 2019 were generally favorable for the growth and development of sunflower plants. Autumn-winter moisture reserves (for the period September-March) amounted to 325 mm, for the growing season – 264.7. In oilseed varieties, the shortest growing season was observed for ‘VNIIMK 100’ – 80 days, for confectionery sunflower – ‘Belochka’ – 107 days. The highest height of plants of confectionery varieties (208.6 cm) was formed by the ‘SPK’; of oilseeds – ‘Umnik’ – 176.5 cm. The highest indicators of oil content of seeds and oil collection were recorded for ‘Umnik’ variety – 53.6 % and 0.97 t/ha respectively. Based on the results of environmental testing of various sunflower varieties of domestic selection, we can conclude about the potential of crop productivity in the steppe zone of the Crimea. The most adapted among oilseed sunflower varieties of domestic selection is ‘Umnik’ with a seed yield of 1.99 t/ha and an oil content of 53.6%; among confectionery varieties – ‘SPK’ variety with a yield of 2.12 t/ha and an oil content of 43.6%. Cultivating varieties in the climate conditions of 2019 was cost-effective: the level of profitability for all varieties varied from 63.7 to 93.4%.
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Badyanov, E. V., and S. A. Ramazanova. "THE TESTING OF SSR MARKERS OF GENES CONTROLLING RESISTANCE TO P. HALSTEDII AND THE SELECTION OF OPTIMAL CONDITIONS FOR PCR." In 11-я Всероссийская конференция молодых учёных и специалистов «Актуальные вопросы биологии, селекции, технологии возделывания и переработки сельскохозяйственных культур». V.S. Pustovoit All-Russian Research Institute of Oil Crops, 2021. http://dx.doi.org/10.25230/conf11-2021-19-24.

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Downy mildew is one of the most harmful diseases of sunflower. The most effective measure of this disease control is the development of resistant varieties and hybrids. The use of molecular markers, in particular DNA markers, allows to control the presence of dominant resistance genes at each stage of breeding. We carried out the selection of the optimal method for the isolation of sunflower DNA and the selection of the optimal temperature regimes of amplification for 10 pairs of primers developed to mark the Pl6, Pl8, Pl13, and PlArg genes. Preliminary, we identified 13 allelic variants that are suitable for DNA genotyping of Helianthus annuus by these loci.
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Chebanova, Yu V., and T. A. Kovalenko. "THE NEW LINES OF SUNFLOWER WITH HIGH CONTENT OF STEARIC ACID IN SEED OIL." In 11-я Всероссийская конференция молодых учёных и специалистов «Актуальные вопросы биологии, селекции, технологии возделывания и переработки сельскохозяйственных культур». V.S. Pustovoit All-Russian Research Institute of Oil Crops, 2021. http://dx.doi.org/10.25230/conf11-2021-135-138.

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There is a demand in the food industry for natural solid vegetable oils. The use of sunflower oil with a high content of stearic acid prevents its hydrogenation in the manufacture of food products. The development of new lines of sunflower (Helianthus annuus L.) with an increased content of stearic acid may increase the demand for sunflower oil, a useful analogue of solid vegetable oils for special food purposes. We identified two inbred lines with a high content of stearic and oleic acids from a source with a high content of these acids, one of which, I5HSHO-1, is one-headed, the other, I5HSHO-2v, is many-branched, as well as two one-headed lines with high content of stearic acid on the linoleic background (I5HSLO-1, I5HSLO-2).
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Guseva, S. А., and D. D. Babushkin. "STUDYING OF COMBINING ABILITY OF SUNFLOWER (HELIANTHUS ANNUUS L.) BY A HEAD SQUARE AND SEEDS YIELD IN TESTER CROSSES." In 11-я Всероссийская конференция молодых учёных и специалистов «Актуальные вопросы биологии, селекции, технологии возделывания и переработки сельскохозяйственных культур». V.S. Pustovoit All-Russian Research Institute of Oil Crops, 2021. http://dx.doi.org/10.25230/conf11-2021-54-58.

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We analyzed a calculation of combining ability (CA) of 21 sunflower genotypes of Russian and foreign breeding by seed yield and head square, determined in a scheme of top-cross. Also there is considered a relation of mean squires of variability of common and specific combining abilities with a purpose to determine prevailing effects of gens. We revealed the sunflower variety samples with high meanings of effects of common combining ability and dispersion of specific combining ability as well as hybrid combinations F1 with high effects of specific combining ability.
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Guo, Ping, Jin Wang, Chunli Kang, Weiwei Chen, Tao Chen, and Xueyu Lin. "The Effects on Solubility of PCP by Sunflower (Helianthus Annuus) Root Exudates in Different Environmental Conditions." In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5163605.

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"Plant population and nitrogen effects on achene yield and quality of Sunflower (Helianthus annuus L) hybrids." In International Conference on Agricultural, Environmental and Biological Sciences. International Institute of Chemical, Biological & Environmental Engineering, 2014. http://dx.doi.org/10.15242/iicbe.c414001.

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Гарибян, T. С., З. С. Константинов, and E. В. Захарова. "STUDY OF THE EFFECT OF NUTRIENT MEDIUM COMPONENTS ON THE REGENERATIVE ABILITIES OF SUNFLOWER EXPLANTS (HELIANTHUS ANNUUS)." In Материалы I Всероссийской научно-практической конференции с международным участием «Геномика и современные биотехнологии в размножении, селекции и сохранении растений». Crossref, 2020. http://dx.doi.org/10.47882/genbio.2020.27.21.034.

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Tran, Vivian. "Wild and cultivated sunflower (Helianthus annuus L.) do t differ in salinity tolerance when taking vigor into account." In ASPB PLANT BIOLOGY 2020. ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1053054.

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