Morfologia e viabilidade de grãos de pólen de acessos silvestres de abacaxi

Soares, Taliane Leila; Souza, Everton Hilo de; Rossi, Mônica Lanzoni; Souza, Fernanda Vidigal Duarte

doi:10.1590/s0103-84782011001000011

Cited by 11 publications

(10 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Palma-Silva et al (2004) evaluated the viability by histochemistry using Alexander's stain (1980) in ten Vriesea species and obtained viability higher than 90%. Soares et al (2011) studied different species of the genus Ananas using two incubation temperatures (25 ºC and 30 ºC) for in vitro germination of pollen and observed that 25 °C was the most suitable temperature for P. sagenarius, while for the other varieties there was no difference between the optimal temperatures.…”

Section: Pollen Morphology and Viability In Bromeliaceae 3069mentioning

confidence: 99%

Pollen morphology and viability in Bromeliaceae

Souza

Rossi

et al. 2017

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

Pollen morphology characterization is important in taxonomy, conservation and plant breeding, and pollen viability studies can support breeding programs. This study investigated pollen morphology and male fertility in 18 species of Bromeliaceae with ornamental potential. For morphological characterization, pollen grains were acetolyzed and characterization of exine was done using scanning and transmission electron microscopy. Pollen viability was investigated by in vitro germination and histochemical tests. Species belonging to Aechmea and Ananas genera presented medium size pollen, except for Ae. fasciata, with large pollen. Al. nahoumii, P. sagenarius and the Vriesea species analyzed showed large pollen, except for V. carinata, with very large pollen. Pollen of Aechmea, Ananas and P. sagenarius presented bilateral symmetry, diporate, exine varying from tectate to semitectate. Al. nahoumii and Vriesea species presented pollen with bilateral symmetry, monocolpate; exine was semitectate, reticulate and heterobrochate. Germination percentage and tube growth were greater in SM and BKM media. Histochemical tests showed pollen viability above 70% for all species, except for Ananas sp. (40%). Pollen morphology is important for the identification of species, especially in this family, which contains a large number of species. High rates of viability favor fertilization and seed production, essential for efficient hybrid production and conservation.

show abstract

Section: Pollen Morphology and Viability In Bromeliaceae 3069mentioning

confidence: 99%

Pollen morphology and viability in Bromeliaceae

Souza

Rossi

et al. 2017

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

show abstract

“…Knowledge about pollen viability is important for taxonomy, ecology and palynology, providing information on the reproductive biology and conservation of the species (Alexander, 1980;Souza et al, 2002;Usman et al, 2013). It is also critical in genetic breeding, in the routine use of artificial pollination (Nascimento et al, 2003;Munhoz et al, 2008); in pollen monitoring during storage; in evaluation of pollen germination after exposure to stresses; in analyses of dispersion and gene flow; and in studies of genetics and pollen-stigma interactions, incompatibility and fertility (Santos et al, 2007;Bauermann et al, 2009;Almeida et al, 2011;Soares et al, 2011;Cuchiara et al, 2012 ).…”

Section: Introductionmentioning

confidence: 99%

Genetic parameters of pollen viability in guava (Psidium guajava L.)

Silva¹,

Silva²,

Marçal³

et al. 2017

Aust J Crop Sci

View full text Add to dashboard Cite

Pollen viability is essential for the sexual reproduction in plants. Genetic and environmental factors as well as plant age can influence this characteristic. In this work, pollen viability was studied in guava (Psidium guajava L.), a cross-pollination species. The genetic parameters for this characteristic were estimated considering 22 genotypes, two environments and different plant ages. For that, the pollen viability of the genotypes was evaluated for three years (2013, 2014 and 2015) in two experimental orchards (installed in randomized block design, with three blocks and two plants per plot) and at two different regions of the state of Espírito Santo, Brazil. The plants were analyzed at 19, 24 and 38 months of age in the years 2013 and 2014 in Mimoso do Sul (ES) and 2015 in Linhares (ES), respectively. The flower buds, at pre-anthesis stage, were collected, fixed in ethanol:acetic acid (3:1) and stored at -20°C. Pollen viability was obtained by colorimetric methods (Alexander's, Acetic Orcein and Lugol dyes) and the genetic parameters estimated by means of mixed models. The pollen viability of the genotypes was high, with an overall mean of 93.46% in the thr ee harvests. Mean heritability was lower in the harvests of 2013 (0.479) and 2014 (0.126) in relation to 2015 (0.583), indicating a slighter possibility of predicting genetic gains based on this characteristic. Altogether, these results provide information about pollen viability in commercial and superior genotypes of the guava crop used in this study, given that pollen-donor genotypes are reported to influence characteristics related to weight and fruit quality in this species. In addition, these genotypes showed good potential for cross-pollination, and can therefore be used as pollinators in orchards and crosses within breeding programs.

show abstract

“…Ainda assim, 37,5% da amostra foi composta por flores com quase a totalidade de pólen inviável. Vale salientar que embora os métodos colorimétricos sejam aproximações da verdadeira eficiência polínica em seu potencial na fertilização de óvulos, estudos têm apontado que tais técnicas superestimam a viabilidade polínica (Munhoz et al 2008;Soares et al 2011). Tal fato ainda corrobora o padrão encontrado de alta taxa de inviabilidade polínica em S. commutatum.…”

unclassified

Qualidade polínica, anormalidades meióticas e poliploidia emSisyrinchium commutatum (Iridaceae)

2015

View full text Add to dashboard Cite

ResumoO comportamento meiótico de Sisyrinchium commutatum (Iridaceae) foi avaliado e associado com a qualidade polínica observada em uma população do sudeste do Brasil. Além disso, pela primeira vez, descreve-se o nú-mero cromossômico desta espécie (2n = 36), contribuindo assim para a sistemática do grupo. Alguns aspectos da biologia floral são relatados e confirmam a ocorrência de apresentação secundária de pólen e a ausência de autofertilização e apomixia, comuns para o gênero. Os resultados do presente trabalho confirmam a ação das anormalidades meióticas (multivalentes e pontes cromossômicas) como possível mecanismo disruptivo na formação de grãos de pólen com consequências ao sucesso reprodutivo na população estudada. Palavras-chave: pólen, número cromossômico, meiose, poliploidia. AbstractThe meiotic behaviour of Sisyrinchium commutatum (Iridaceae) was studied and associated to the pollen quality observed in a southeastern population in Brazil. For the first time, the chromosome number is reported for this species (2n = 36). Some traits of floral biology were recorded and secondary pollen presentation as well as the absence of autonomous self-fertilization and apomixy were observed. The results of this study confirm the abnormalities in the meiosis process breaking the pollen grain formation with consequences to reproductive success in the studied population.

show abstract

Morfologia e viabilidade de grãos de pólen de acessos silvestres de abacaxi

Cited by 11 publications

References 12 publications

Pollen morphology and viability in Bromeliaceae

Pollen morphology and viability in Bromeliaceae

Genetic parameters of pollen viability in guava (Psidium guajava L.)

Qualidade polínica, anormalidades meióticas e poliploidia emSisyrinchium commutatum (Iridaceae)

Contact Info

Product

Resources

About