scholarly journals Differential expression of AtWAKL10 in response to nitric oxide suggests a putative role in biotic and abiotic stress responses

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7383
Author(s):  
Phearom Bot ◽  
Bong-Gyu Mun ◽  
Qari Muhammad Imran ◽  
Adil Hussain ◽  
Sang-Uk Lee ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Abiotic Stress ◽  
Pseudomonas Syringae ◽  
Stress Responses ◽  
Abiotic Stresses ◽  
Nitrosative Stress ◽  
Abiotic Stress Tolerance ◽  
Biotic And Abiotic Stress ◽  
Transcript Accumulation

Plant defense against pathogens and abiotic stresses is regulated differentially by communicating signal transduction pathways in which nitric oxide (NO) plays a key role. Here, we show the biological role of Arabidopsis thaliana wall-associated kinase (AtWAK) Like10 (AtWAKL10) that exhibits greater than a 100-fold change in transcript accumulation in response to the NO donor S-nitroso-L-cysteine (CysNO), identified from high throughput RNA-seq based transcriptome analysis. Loss of AtWAKL10 function showed a similar phenotype to wild type (WT) with, however, less branching. The growth of atwakl10 on media supplemented with oxidative or nitrosative stress resulted in differential results with improved growth following treatment with CysNO but reduced growth in response to S-nitrosoglutatione (GSNO) and methyl-viologen. Further, atwakl10 plants exhibited increased susceptibility to virulent Pseudomonas syringae pv tomato (Pst) DC3000 with a significant increase in pathogen growth and decrease in PR1 transcript accumulation compared to WT overtime. Similar results were found in response to Pst DC3000 avrB, resulting in increased cell death as shown by increased electrolyte leakage in atwakl10. Furthermore, atwakl10 also showed increased reactive oxygen species accumulation following Pst DC3000 avrB inoculation. Promoter analysis of AtWAKL10 showed transcription factor (TF) binding sites for biotic and abiotic stress-related TFs. Further investigation into the role of AtWAKL10 in abiotic stresses showed that following two weeks water-withholding drought condition most of the atwakl10 plants got wilted; however, the majority (60%) of these plants recovered following re-watering. In contrast, in response to salinity stress, atwakl10 showed reduced germination under 150 mM salt stress compared to WT, suggesting that NO-induced AtWAKL10 differentially regulates different abiotic stresses. Taken together, this study further elucidates the importance of NO-induced changes in gene expression and their role in plant biotic and abiotic stress tolerance.

scholarly journals Balancing trade-offs between biotic and abiotic stress responses through leaf age-dependent variation in stress hormone cross-talk

2019 ◽  
Vol 116 (6) ◽  
pp. 2364-2373 ◽  
Author(s):  
Matthias L. Berens ◽  
Katarzyna W. Wolinska ◽  
Stijn Spaepen ◽  
Jörg Ziegler ◽  
Tatsuya Nobori ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Stress Responses ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Leaf Age ◽  
Biotic And Abiotic Stress ◽  
Biotic And Abiotic Stresses ◽  
Trade Offs ◽  
Age Dependent

In nature, plants must respond to multiple stresses simultaneously, which likely demands cross-talk between stress-response pathways to minimize fitness costs. Here we provide genetic evidence that biotic and abiotic stress responses are differentially prioritized inArabidopsis thalianaleaves of different ages to maintain growth and reproduction under combined biotic and abiotic stresses. Abiotic stresses, such as high salinity and drought, blunted immune responses in older rosette leaves through the phytohormone abscisic acid signaling, whereas this antagonistic effect was blocked in younger rosette leaves byPBS3, a signaling component of the defense phytohormone salicylic acid. Plants lackingPBS3exhibited enhanced abiotic stress tolerance at the cost of decreased fitness under combined biotic and abiotic stresses. Together with this role,PBS3is also indispensable for the establishment of salt stress- and leaf age-dependent phyllosphere bacterial communities. Collectively, our work reveals a mechanism that balances trade-offs upon conflicting stresses at the organism level and identifies a genetic intersection among plant immunity, leaf microbiota, and abiotic stress tolerance.

scholarly journals Jasmonic Acid in Plant Abiotic Stress Tolerance and Interaction with Abscisic Acid

Agronomy ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1886
Author(s):  
Hui Jin Kim ◽  
Subhin Seomun ◽  
Youngdae Yoon ◽  
Geupil Jang
Keyword(s):  
Abscisic Acid ◽  
Abiotic Stress ◽  
Jasmonic Acid ◽  
Stress Responses ◽  
Abiotic Stresses ◽  
Crucial Role ◽  
Abiotic Stress Tolerance ◽  
Plant Responses ◽  
Plant Abiotic Stress

The phytohormone jasmonic acid (JA), a cyclopentane fatty acid, mediates plant responses to abiotic stresses. Abiotic stresses rapidly and dynamically affect JA metabolism and JA responses by upregulating the expression of genes involved in JA biosynthesis and signaling, indicating that JA has a crucial role in plant abiotic stress responses. The crucial role of JA has been demonstrated in many previous studies showing that JA response regulates various plant defense systems, such as removal of reactive oxygen species and accumulation of osmoprotectants. Furthermore, increasing evidence shows that plant tolerance to abiotic stresses is linked to the JA response, suggesting that abiotic stress tolerance can be improved by modulating JA responses. In this review, we briefly describe the JA biosynthetic and signaling pathways and summarize recent studies showing an essential role of JA in plant responses and tolerance to a variety of abiotic stresses, such as drought, cold, salt, and heavy metal stress. Additionally, we discuss JA crosstalk with another key stress hormone, abscisic acid, in plant abiotic stress responses.

scholarly journals WRKY Proteins: Signaling and Regulation of Expression during Abiotic Stress Responses

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Aditya Banerjee ◽  
Aryadeep Roychoudhury
Keyword(s):  
Abiotic Stress ◽  
Stress Responses ◽  
Biotic Stress ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Plant Signaling ◽  
Biological Functions ◽  
Abiotic And Biotic Stress ◽  
Regulation Of Expression ◽  
Wrky Proteins

WRKY proteins are emerging players in plant signaling and have been thoroughly reported to play important roles in plants under biotic stress like pathogen attack. However, recent advances in this field do reveal the enormous significance of these proteins in eliciting responses induced by abiotic stresses. WRKY proteins act as major transcription factors, either as positive or negative regulators. Specific WRKY factors which help in the expression of a cluster of stress-responsive genes are being targeted and genetically modified to induce improved abiotic stress tolerance in plants. The knowledge regarding the signaling cascade leading to the activation of the WRKY proteins, their interaction with other proteins of the signaling pathway, and the downstream genes activated by them are altogether vital for justified targeting of theWRKYgenes. WRKY proteins have also been considered to generate tolerance against multiple abiotic stresses with possible roles in mediating a cross talk between abiotic and biotic stress responses. In this review, we have reckoned the diverse signaling pattern and biological functions of WRKY proteins throughout the plant kingdom along with the growing prospects in this field of research.

Role of Nitric Oxide in Plant Abiotic Stress Tolerance

2020 ◽  
pp. 131-154
Author(s):  
Gábor Feigl ◽  
Árpád Molnár ◽  
Dóra Oláh ◽  
Zsuzsanna Kolbert
Keyword(s):  
Nitric Oxide ◽  
Abiotic Stress ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance ◽  
Plant Abiotic Stress

Role of Nitric Oxide and Calcium Signaling in Abiotic Stress Tolerance in Plants

2020 ◽  
pp. 563-581
Author(s):  
Zaffar Malik ◽  
Sobia Afzal ◽  
Muhammad Danish ◽  
Ghulam Hassan Abbasi ◽  
Syed Asad Hussain Bukhari ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Abiotic Stress ◽  
Calcium Signaling ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance

Role of nitric oxide in hydrogen peroxide-dependent induction of abiotic stress tolerance by brassinosteroids in cucumber

2010 ◽  
Vol 34 (2) ◽  
pp. 347-358 ◽  
Author(s):  
JIN-XIA CUI ◽  
YAN-HONG ZHOU ◽  
JIAN-GANG DING ◽  
XIAO-JIAN XIA ◽  
KAI SHI ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Hydrogen Peroxide ◽  
Abiotic Stress ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance
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