Buscar
Mostrando ítems 1-10 de 128
Microspore wall organisation and ultrastructure in two species of Selaginella (Lycophyta) producing permanent tetrads
(Taylor & Francis As, 2012-07)
Spore morphology and ultrastructural features of the permanent microspore tetrads of Selaginella convoluta and S. lepidophylla were studied with light microscopy, scanning and transmission electron microscopy. The four ...
Pollen grain development and male sterility in the perfect flowers of Maytenus obtusifolia Mart. (Celastraceae)
(Springer, 2019-05-01)
Perfect flowers of Maytenus obtusifolia have partial sterility of pollen grains, resulting in collapsed and developed free microspores. However, the cellular events resulting in partial male sterility have not been determined. ...
Reinterpretation of Paleoazolla: A heterosporous water fern from the Late Cretaceous of Patagonia, Argentina
(Wiley Blackwell Publishing, Inc, 2020-07)
Premise: Undoubtedly, fossils are critical for understanding evolutionary transformations in deep time. Here, we reinvestigate the microspores and megaspores of Paleoazolla patagonica, a water fern found in Late Cretaceous ...
It's a matter of timing: asynchrony during pollen development and its consequences on pollen performance in angiosperms
(Springer Wien, 2017-01)
Functional pollen is needed to successfully complete fertilization. Pollen is formed inside the anthers following a specific sequence of developmental stages, from microsporocyte meiosis to pollen release, that concerns ...
Anther culture in Physalis peruviana L. Microspore stages, sterilization methods and culture mediaCultivo de anteras en Physalis peruviana L. estadios de microsporas, métodos de esterilización y medios de cultivo
(Universidad Centroccidental Lisandro Alvarado, 2022)
Effect of ovary induction on bread wheat anther culture: ovary genotype and developmental stage, and candidate gene association
(Universidad Politécnica de ValenciaEspaña, 2015-06-18)
Ovary pre-conditioned medium and ovary co-culture increased the efficiency of green doubled haploid plant production in bread wheat anther culture. The positive effect of this medium led to a 6- and 11-fold increase in the ...