An Arabidopsis Glutathione Peroxidase Functions as Both a Redox Transducer and a Scavenger in Abscisic Acid and Drought Stress Responses

Drought stress during the shipping and retailing of floriculture crops can reduce postproduction shelf life and marketability. The plant hormone abscisic acid (ABA) mediates drought stress responses by closing stomata and reducing water loss. Applications of exogenous s-ABA effectively reduce water loss and allow a variety of species to survive temporary periods of drought stress. Unfortunately, s-ABA application can also lead to leaf chlorosis, which reduces the overall quality of economically important bedding plant species, including Viola ×wittrockiana (pansy). The goal of this research was to determine how to prevent s-ABA-induced leaf chlorosis in pansy and a closely related species, Viola cornuta (viola). All concentrations of both spray (250 or 500 mg·L−1) and drench (125 or 250 mg·L−1) s-ABA applications induced leaf yellowing. Young plants at the plug stage and 11-cm finished plants with one to two open flowers were further evaluated to determine if the developmental stage of the plants influenced s-ABA effectiveness or the development of negative side effects. Both plugs and finished pansies and violas developed leaf chlorosis after s-ABA applications, but symptoms were generally more severe in finished plants. The individual application of benzyladenine (BA), gibberellic acid (GA4+7), or the ethylene perception inhibitor, 1-methylcyclopropene, before s-ABA application had no effect on the development of s-ABA-induced leaf chlorosis. However, applications of 5 or 10 mg·L−1 BA and GA4+7 as a mixture (BA + GA4+7) before a drench or spray application of s-ABA prevented leaf chlorosis. The application of s-ABA and BA + GA4+7 would allow floriculture crops to tolerate temporary periods of drought stress without any loss of postproduction quality.

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Role of an Arabidopsis AP2/EREBP-Type Transcriptional Repressor in Abscisic Acid and Drought Stress Responses

The Plant Cell ◽

10.1105/tpc.105.033043 ◽

2005 ◽

Vol 17 (8) ◽

pp. 2384-2396 ◽

Cited By ~ 307

Author(s):

Chun-Peng Song ◽

Manu Agarwal ◽

Masaru Ohta ◽

Yan Guo ◽

Ursula Halfter ◽

...

Keyword(s):

Abscisic Acid ◽

Drought Stress ◽

Stress Responses ◽

Transcriptional Repressor

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The Arabidopsis RING E3 Ubiquitin Ligase AtAIRP2 Plays Combinatory Roles with AtAIRP1 in Abscisic Acid-Mediated Drought Stress Responses

PLANT PHYSIOLOGY ◽

10.1104/pp.111.185595 ◽

2011 ◽

Vol 157 (4) ◽

pp. 2240-2257 ◽

Cited By ~ 59

Author(s):

Seok Keun Cho ◽

Moon Young Ryu ◽

Dong Hye Seo ◽

Bin Goo Kang ◽

Woo Taek Kim

Keyword(s):

Abscisic Acid ◽

Drought Stress ◽

Ubiquitin Ligase ◽

Stress Responses ◽

E3 Ubiquitin Ligase ◽

Ring E3

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Roles of Four Arabidopsis U-Box E3 Ubiquitin Ligases in Negative Regulation of Abscisic Acid-Mediated Drought Stress Responses

PLANT PHYSIOLOGY ◽

10.1104/pp.112.202143 ◽

2012 ◽

Vol 160 (1) ◽

pp. 556-568 ◽

Cited By ~ 71

Author(s):

Dong Hye Seo ◽

Moon Young Ryu ◽

Fabien Jammes ◽

Jae Hwan Hwang ◽

Michelle Turek ◽

...

Keyword(s):

Abscisic Acid ◽

Drought Stress ◽

Stress Responses ◽

Ubiquitin Ligases ◽

Negative Regulation ◽

E3 Ubiquitin Ligases

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Increased Abscisic Acid Sensitivity And Drought Stress By Overexpression of Abscisic Acid Receptors In Arabidopsis Thaliana

10.21203/rs.3.rs-703845/v1 ◽

2021 ◽

Author(s):

Li Qing ◽

Tian Qianqian ◽

Zhang Yue ◽

Niu Mengxue ◽

Yu Xiaoqian ◽

...

Keyword(s):

Abscisic Acid ◽

Drought Stress ◽

Stress Responses ◽

Populus Euphratica ◽

Wild Type ◽

Positive Role ◽

Acid Sensitivity ◽

Cis Acting ◽

Aba Sensitivity ◽

Use Efficiency

Abstract Abscisic acid (ABA) is a key plant hormone that regulates plant growth development and stress response. ABA is recognized and bound by ABA Receptor PYR/PYL/RCAR (referred to as PYLs). However, little is known about the PYLs gene family in Populus euphratica. Here, we identified 12 PYLs in P. euphratica and named PePYL1-12. Phylogenetic analysis divided the 12 PePYLs into three subfamilies. Subcellular localization showed that PePYL2, PePYL4, PePYL5, PePYL6, and PePYL9 were located in the cytoplasm and nucleus, PePYL10 localized in the nucleus. The promoter of 12 PePYLs contains hormones- and abiotic stress-related cis-acting elements. Moreover, ABA and drought significantly up-regulation the expression of PePYL6 and PePYL9. To study the performance of PePYLs under ABA and drought stress, we generated transgenic Arabidopsis plants overexpressing PePYL6 and PePYL9. Compared with wild type, transgenic Arabidopsis enhanced ABA sensitivity during seed germination and root growth, improved water use efficiency and drought resistance. Taken together, our results confirmed that PePYL6 and PePYL9 play a positive role in ABA-mediated stress responses in P. euphratica.

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Expression of AhATL1, an ABA Transport Factor Gene from Peanut, Is Affected by Altered Memory Gene Expression Patterns and Increased Tolerance to Drought Stress in Arabidopsis

International Journal of Molecular Sciences ◽

10.3390/ijms22073398 ◽

2021 ◽

Vol 22 (7) ◽

pp. 3398

Author(s):

Ming Qin ◽

Xiaoyan Li ◽

Shaohua Tang ◽

Yinglin Huang ◽

Ling Li ◽

...

Keyword(s):

Abscisic Acid ◽

Drought Stress ◽

Stress Responses ◽

Expression Patterns ◽

Plant Stress ◽

Limited Information ◽

Response Gene ◽

Stress Memory ◽

Gene Type ◽

Aba Content

Arachis hypogaea abscisic acid transporter like-1 (AhATL1) modulates abscisic acid (ABA) sensitivity by specifically influencing the importing of ABA into cells, and is a key player in plant stress responses. However, there is limited information on ABA transporters in crops. In this study, we found that the level of AhATL1 expression and AhATL1 distribution increased more rapidly in the second drought (D2) compared with in the first drought (D1). Compared with the first recovery (R1), the AhATL1 expression level and ABA content remained at a higher level during the second recovery (R2). The heterologous overexpression of AhATL1 in Arabidopsis changed the expression pattern of certain memory genes and changed the post response gene type into the memory gene type. Regarding the proline and water content of Col (Arabidopsis thaliana L. Heynh., Col-0), atabcg22, and AhATL1-OX during drought training, the second drought (D2) was more severe than the first drought (D1), which was more conducive to maintaining the cell osmotic balance and resisting drought. In summary, drought stress memory resulted in a rapid increase in the AhATL1 expression and AhATL1 distribution level, and then raised the endogenous ABA content and changed the post response gene type into the memory gene type, which enhanced the drought resistance and recovery ability.

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