Abstract
The Arabidopsis male-sterile phenotype has been a wonderful model for jasmonate action in plants. It has allowed us to identify transcription factors that control gene expression during stamen and pollen maturation and provided for the discovery of the JAZ repressor proteins and the mechanism of jasmonate signaling. More recently, it has revealed intriguing details of the spatial localization of jasmonate synthesis and perception in stamen tissues. The extensive and thoughtful application of protein–protein interaction assays to identify JAZ-interacting partners has led to a much richer appreciation of the mechanisms by which jasmonate integrates with the actions of other hormones to regulate plant growth and physiological responses. This integration is strikingly evident in stamen and pollen development in Arabidopsis, which requires the actions of many hormones. Just as importantly, it is now evident that jasmonate has very different actions during flower development and reproduction in other plant species. This integration and diversity of action indicates that many exciting discoveries remain to be made in this area of jasmonate hormone signaling and response.
Highlights
Jasmonate (JA) hormone controls many aspects of plant biology, ranging from stress responses to development
(and other jasmonate-synthesis mutants), filament elongation, anther mutant, filament elongation, dehiscence, and pollen are all defective as in coi1,asbut buds with buds jasmonate anther dehiscence, andfunction pollen function are all defective in treating coi1, butflower treating flower with makes the makes flowersthe as flowers fertile asaswild type
We identified 13 transcription factors induced by JA that potentially act in the control of stamen maturation
Summary
Jasmonate (JA) hormone controls many aspects of plant biology, ranging from stress responses to development. The very high proportions of trienoic fatty acids (including linolenate) found in chloroplast chloroplast membranes of all higher plants suggest that these lipid structures might be essential for membranes of allTo higher suggestwe thatproduced these lipidastructures might triple be essential for(fad photosynthesis. Characterization ofofflowers flowers in the fad3–fad7–fad triple mutant identified three of the male-sterile phenotype:. In the fad3–fad7–fad triple (and other jasmonate-synthesis mutants), filament elongation, anther mutant (fad = fatty acid desaturation) (and other jasmonate-synthesis mutants), filament elongation, dehiscence, and pollen are all defective as in coi1,asbut buds with buds jasmonate anther dehiscence, andfunction pollen function are all defective in treating coi, butflower treating flower with makes the makes flowersthe as flowers fertile asaswild type.
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