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In vitro pollen germination and pollen viability in passion fruit (Passiflora spp.) Rev. Bras. Frutic.
Soares,Taliane Leila; Jesus,Onildo Nunes de; Santos-Serejo,Janay Almeida dos; Oliveira,Eder Jorge de.
The use of Passiflora species for ornamental purposes has been recently developed, but little is known about pollen viability and the potential for crossing different species. The objective of this study was to evaluate the pollen viability of six Passiflora species collected from different physiological stages of development through in vitro germination and histochemical analysis using dyes. The pollen was collected in three stages (pre-anthesis, anthesis and post-anthesis). Three compositions of culture medium were used to evaluate the in vitro germination, and two dyes (2,3,5-triphenyltetrazolium chloride, or TTC, and Lugol's solution) were used for the histochemical analysis. The culture medium containing 0.03% Ca(NO3) 4H2O, 0.02% of Mg(SO4 ).7H2O,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Passion fruit; Pollen germination; Histochemical analysis; Wild passion fruit.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452013000400023
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Meiotic Behavior and Pollen Viability of Spondias mombin L.: native fruit species of the amazon. Repositório Alice
ZORTÉA, K. E. M.; ROSSI, A. A. B.; BISPO, R. B.; ROCHA, V. D. da; HOOGERHEIDE, E. S. S..
Spondias mombin L. is a fruit species native to the Amazon with great marketing potential. The aim of this study was to examine the meiotic behavior and pollen viability of S. mombin. Flower buds at various developmental stages were collected for analyses of pollen viability, in vitro germination, and meiotic behavior. S. mombin is diploid with 2n = 2x = 30 chromosomes. Meiosis showed to be regular, with only 13.3% of cells with abnormal division. A high meiotic index was found: 96.5%. Pollen viability did not differ between male (96.3%) and bisexual (96.7%) flowers, and the overall mean of viable pollen was considered high (96.5%). Pollen germination occurred in all tested media, with the treatment containing 20% sucrose and 50 mg mL‒1 boric...
Tipo: Artigo de periódico Palavras-chave: Pollen fertility; Meiotic index; Cajá; Pollen germination.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113337
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Pollen has higher water content when dispersed in a tricellular state than in a bicellular state Acta Botanica
Williams,Joseph H.; Brown,Chandler D..
ABSTRACT Pollen is generally dispersed in a sexually immature and somewhat dehydrated, metabolically quiescent state. Yet, in some species, pollen at anthesis is well-hydrated and metabolically active, and in 30 % of angiosperms pollen is dispersed after having formed its sperm cells. Pollen water content and sexual maturity may be correlated, either because both are subject to trade-offs between dispersal viability and post-pollination performance, or because the traits display developmental linkages. We inferred relative water content of sexually immature (“bicellular”) and sexually mature (“tricellular”) pollen of 30 species of angiosperms using a hydration index (HI) that ranges from zero to one, based on how near fresh pollen volume is to its minimal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Desiccation stress; Evolution of development; Pollen dispersal; Pollen germination; Pollen hydration; Spore dormancy; Trade-off.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300454
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Reproductive biology traits affecting productivity of sour cherry PAB
Aksic,Milica Fotiric; Rakonjac,Vera; Nikolic,Dragan; Zec,Gordan.
The objective of this work was to evaluate variability in reproductive biology traits and the correlation between them in genotypes of 'Oblačinska' sour cherry (Prunus cerasus). High genetic diversity was found in the 41 evaluated genotypes, and significant differences were observed among them for all studied traits: flowering time, pollen germination, number of fruiting branches, production of flower and fruit, number of flowers per bud, fruit set, and limb yield efficiency. The number of fruiting branches significantly influenced the number of flower and fruit, fruit set, and yield efficiency. In addition to number of fruiting branches, yield efficiency was positively correlated with fruit set and production of flower and fruit. Results from principal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Prunus cerasus; Breeding; Genetic divergence; Pollen germination; Principal component analysis; Yield efficiency.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000100005
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The effect of three plant bioregulators on pollen germination, pollen tube growth and fruit set in almond [Prunus dulcis (Mill.) D.A. Webb] cvs. Non Pareil and Carmel Electron. J. Biotechnol.
Maita,Segundo; Sotomayor,Carlos.
Background In commercial almond [Prunus dulcis (Mill.) D.A. Webb] orchards in Chile, the percentage of fruit set is low and commonly reaches 5–30%. As almond trees bloom during a cool period and also suffer from self-incompatibility, any factor that can improve pollination, pollen germination and pollen tube growth or extend the effective pollination period, such as the application of plant bioregulators (PBRs), should be beneficial for fruit production. Results Three plant bioregulators (PBRs): brassinolide (BL), gibberellic acid (GA3) and kinetin (KN) were evaluated for pollen germination and pollen tube growth in vitro, as well as for fruit set in almond cultivars Non Pareil and Carmel, in central Chile, during the 2013 and 2014 seasons. For pollen...
Tipo: Journal article Palavras-chave: Fruit set; Plant bioregulators; Pollen germination; Pollen tube growth; Prunus dulcis.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000500010
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