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Cited by 444

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Gibberellin Acts through Jasmonate to Control the Expression of MYB21, MYB24, and MYB57 to Promote Stamen Filament Growth in Arabidopsis

Open access
Cheng, Hui, Song, Susheng, Xiao, Langtao, Soo, Hui Meng, Cheng, Zhiwei, Xie, Daoxin, Peng, Jinrong·2009·PLoS Genetics

Abstract

Precise coordination between stamen and pistil development is essential to make a fertile flower. Mutations impairing stamen filament elongation, pollen maturation, or anther dehiscence will cause male sterility. Deficiency in plant hormone gibberellin (GA) causes male sterility due to accumulation of DELLA proteins, and GA triggers DELLA degradation to promote stamen development. Deficiency in plant hormone jasmonate (JA) also causes male sterility. However, little is known about the relationship between GA and JA in controlling stamen development. Here, we show that MYB21, MYB24, and MYB57 are GA-dependent stamen-enriched genes. Loss-of-function of two DELLAs RGA and RGL2 restores the expression of these three MYB genes together with restoration of stamen filament growth in GA-deficient plants. Genetic analysis showed that the myb21-t1 myb24-t1 myb57-t1 triple mutant confers a short stamen phenotype leading to male sterility. Further genetic and molecular studies demonstrate that GA suppresses DELLAs to mobilize the expression of the key JA biosynthesis gene DAD1, and this is consistent with the observation that the JA content in the young flower buds of the GA-deficient quadruple mutant ga1-3 gai-t6 rga-t2 rgl1-1 is much lower than that in the WT. We conclude that GA promotes JA biosynthesis to control the expression of MYB21, MYB24, and MYB57. Therefore, we have established a hierarchical relationship between GA and JA in that modulation of JA pathway by GA is one of the prerequisites for GA to regulate the normal stamen development in Arabidopsis.

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Metadata

Authors
Cheng, H., Song, S., Xiao, L., Soo, H. M., Cheng, Z., Xie, D., & Peng, J.
Venue
PLoS Genetics
Published
2009-03-27
Volume
5
Issue
3
Pages
e1000440
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W1969108244
Cited by
444
References
50
FWCI
23.05
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Gibberellin Acts through Jasmonate to Control the Expression of MYB21, MYB24, and MYB57 to Promote Stamen Filament Growth in Arabidopsis. https://app.cochat.ai/papers/10.1371/journal.pgen.1000440
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Cheng, H., Song, S., Xiao, L., Soo, H. M., Cheng, Z., Xie, D., & Peng, J. (2009). Gibberellin Acts through Jasmonate to Control the Expression of MYB21, MYB24, and MYB57 to Promote Stamen Filament Growth in Arabidopsis. PLoS Genetics. https://doi.org/10.1371/journal.pgen.1000440

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