scholarly journals ABSCISIC ACID INSENSITIVE3 Is Involved in Cold Response and Freezing Tolerance Regulation in Physcomitrella patens

2017 ◽  
Vol 8 ◽  
Author(s):  
Tinghong Tan ◽  
Yanni Sun ◽  
Xingji Peng ◽  
Guochun Wu ◽  
Fang Bao ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Freezing Tolerance ◽  
Physcomitrella Patens ◽  
Cold Response ◽  
Abscisic Acid Insensitive3

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.

Cold Response of Dedifferentiated Barley Cells at the Gene Expression, Hormone Composition, and Freezing Tolerance Levels: Studies on Callus Cultures

2012 ◽  
Vol 54 (2) ◽  
pp. 337-349 ◽  
Author(s):  
Ildikó Vashegyi ◽  
Zsuzsa Marozsán-Tóth ◽  
Gábor Galiba ◽  
Petre I. Dobrev ◽  
Radomira Vankova ◽  
...  
Keyword(s):  
Gene Expression ◽  
Freezing Tolerance ◽  
Callus Cultures ◽  
Cold Response

scholarly journals The Halophyte Halostachys caspica AP2/ERF Transcription Factor HcTOE3 Positively Regulates Freezing Tolerance in Arabidopsis

2021 ◽  
Vol 12 ◽  
Author(s):  
Fangliu Yin ◽  
Youling Zeng ◽  
Jieyun Ji ◽  
Pengju Wang ◽  
Yufang Zhang ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Abscisic Acid ◽  
Freezing Tolerance ◽  
Critical Role ◽  
Extreme Temperature ◽  
Freezing Stress ◽  
Antioxidant Enzyme Activities ◽  
Transcription Factor Gene ◽  
Factor Gene ◽  
Halostachys Caspica

The APETALA2 (AP2) and ethylene-responsive element-binding factor (ERF) gene family is one of the largest plant-specific transcription factor gene families, which plays a critical role in plant development and evolution, as well as response to various stresses. The TARGET OF EAT3 (TOE3) gene is derived from Halostachys caspica and belongs to the AP2 subfamily with two AP2 DNA-binding domains. Currently, AP2 family mainly plays crucial roles in plant growth and evolution, yet there are few reports about the role of AP2 in abiotic stress tolerance. Here, we report HcTOE3, a new cold-regulated transcription factor gene, which has an important contribution to freezing tolerance. The main results showed that the expression of HcTOE3 in the H. caspica assimilating branches was strongly induced by different abiotic stresses, including high salinity, drought, and extreme temperature (heat, chilling, and freezing), as well as abscisic acid and methyl viologen treatments. Overexpressing HcTOE3 gene (OE) induced transgenic Arabidopsis plant tolerance to freezing stress. Under freezing treatment, the OE lines showed lower content of malondialdehyde and electrolyte leakage and less accumulation of reactive oxygen species compared with the wild type. However, the survival rates, antioxidant enzyme activities, and contents of osmotic adjustment substance proline were enhanced in transgenic plants. Additionally, the OE lines increased freezing tolerance by up-regulating the transcription level of cold responsive genes (CBF1, CBF2, COR15, COR47, KIN1, and RD29A) and abscisic acid signal transduction pathway genes (ABI1, ABI2, ABI5, and RAB18). Our results suggested that HcTOE3 positively regulated freezing stress and has a great potential as a candidate gene to improve plant freezing tolerance.

scholarly journals Direct and indirect targets of the arabidopsis seed transcription factor ABSCISIC ACID INSENSITIVE3

2020 ◽  
Vol 103 (5) ◽  
pp. 1679-1694 ◽  
Author(s):  
Ran Tian ◽  
Fangfang Wang ◽  
Qiaolin Zheng ◽  
Venus M. A. G. E. Niza ◽  
A. Bruce Downie ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Abscisic Acid ◽  
Arabidopsis Seed ◽  
Abscisic Acid Insensitive3

scholarly journals Water Content during Abscisic Acid Induced Freezing Tolerance in Bromegrass Cells

1990 ◽  
Vol 93 (2) ◽  
pp. 460-464 ◽  
Author(s):  
Karen Tanino ◽  
Conrad J. Weiser ◽  
Leslie H. Fuchigami ◽  
Tony H. H. Chen
Keyword(s):  
Abscisic Acid ◽  
Water Content ◽  
Freezing Tolerance

scholarly journals Prediction and Validation of Promoters Involved in the Abscisic Acid Response in Physcomitrella patens

2011 ◽  
Vol 4 (4) ◽  
pp. 713-729 ◽  
Author(s):  
Gerrit Timmerhaus ◽  
Sebastian T. Hanke ◽  
Karl Buchta ◽  
Stefan A. Rensing
Keyword(s):  
Abscisic Acid ◽  
Physcomitrella Patens
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