Genes, Vol. 10, Pages 811: Comprehensive Insight into Gibberellin- and Jasmonate-Mediated Stamen Development

Genes, Vol. 10, Pages 811: Comprehensive Insight into Gibberellin- and Jasmonate-Mediated Stamen Development Genes doi: 10.3390/genes10100811 Authors: Marciniak Przedniczek In flowering plants, proper development of male generative organs is required for successful sexual reproduction. Stamen primordia arise in the third whorl of floral organs and subsequently differentiate into filaments and anthers. The early phase of stamen development, in which meiosis occurs, is followed by a late developmental phase, which consists of filament elongation coordinated with pollen maturation, anther dehiscence and finally viable pollen grain release. Stamen development and function are modulated by phytohormones, with a key role of gibberellins (GAs) and jasmonates (JAs). Long-term, extensive investigations, mainly involving GA/JA-deficient and GA/JA-response mutants, have led to a better understanding of the hormone-dependent molecular mechanisms of stamen development. In several species, the principal functions of GAs are to stimulate filament elongation through increased cell elongation and to promote anther locule opening. In the GA-dependent regulation of early stamen development, both the tapetum and developing pollen were identified as major targets. JAs mainly control the late stages of stamen development, such as filament elongation, viable pollen formation and anther dehiscence. A hierarchical relationship between GAs and JAs was recognized mainly in the control of la...
Source: Genes - Category: Genetics & Stem Cells Authors: Tags: Review Source Type: research