Arabidopsis WRKY2 Transcription Factor Mediates Seed Germination and Postgermination Arrest of Development by Abscisic Acid

2011 ◽  
pp. 133-154
Keyword(s):  
Transcription Factor ◽  
Abscisic Acid ◽  
Seed Germination

scholarly journals The Arabidopsis MYB96 Transcription Factor Is a Positive Regulator of ABSCISIC ACID-INSENSITIVE4 in the Control of Seed Germination

2015 ◽  
Vol 168 (2) ◽  
pp. 677-689 ◽  
Author(s):  
Kyounghee Lee ◽  
Hong Gil Lee ◽  
Seongmun Yoon ◽  
Hyun Uk Kim ◽  
Pil Joon Seo
Keyword(s):  
Transcription Factor ◽  
Abscisic Acid ◽  
Seed Germination ◽  
Positive Regulator

scholarly journals OsbZIP09, a Unique OsbZIP Transcription Factor of Rice, Promotes Rather Than Suppresses Seed Germination by Attenuating Abscisic Acid Pathway

Rice Science ◽  
2021 ◽  
Vol 28 (4) ◽  
pp. 358-367
Author(s):  
Wang Chuxin ◽  
Zhu Chengchao ◽  
Zhou Yu ◽  
Xiong Min ◽  
Wang Jindong ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Abscisic Acid ◽  
Seed Germination ◽  
Acid Pathway

scholarly journals Brassinosteroids repress the seed maturation program during the seed-to-seedling transition

2021 ◽  
Author(s):  
Jiuxiao Ruan ◽  
Huhui Chen ◽  
Tao Zhu ◽  
Yaoguang Yu ◽  
Yawen Lei ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Transcription Factor ◽  
Abscisic Acid ◽  
Plant Hormone ◽  
Flowering Plants ◽  
Seed Maturation ◽  
Domain Protein ◽  
Abscisic Acid Insensitive3 ◽  
Underlying Mechanisms ◽  
Embryonic Structure

Abstract In flowering plants, repression of the seed maturation program is essential for the transition from the seed to the vegetative phase, but the underlying mechanisms remain poorly understood. The B3-domain protein VIVIPAROUS1/ABSCISIC ACID-INSENSITIVE3-LIKE 1 (VAL1) is involved in repressing the seed maturation program. Here we uncovered a molecular network triggered by the plant hormone brassinosteroid (BR) that inhibits the seed maturation program during the seed-to-seedling transition in Arabidopsis (Arabidopsis thaliana). val1-2 mutant seedlings treated with a BR biosynthesis inhibitor form embryonic structures, whereas BR signaling gain-of-function mutations rescue the embryonic structure trait. Furthermore, the BR-activated transcription factors BRI1-EMS-SUPPRESSOR 1 and BRASSINAZOLE-RESISTANT 1 bind directly to the promoter of AGAMOUS-LIKE15 (AGL15), which encodes a transcription factor involved in activating the seed maturation program, and suppress its expression. Genetic analysis indicated that BR signaling is epistatic to AGL15 and represses the seed maturation program by downregulating AGL15. Finally, we showed that the BR-mediated pathway functions synergistically with the VAL1/2-mediated pathway to ensure the full repression of the seed maturation program. Together, our work uncovered a mechanism underlying the suppression of the seed maturation program, shedding light on how BR promotes seedling growth.

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