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Jasmonates (JAs) are important phytohormones that regulate a wide range of plant processes, including growth, development and stress responses. Jasmonate ZIM-domain (JAZ) proteins are transcriptional repressors in JA signaling. Overexpression of JAZ7 was found to confer drought tolerance in Arabidopsis thaliana (A. thaliana), but the molecular mechanisms are not known. Using Tandem Mass Tag (TMT) quantitative proteomics and targeted metabolomics approaches, we found that 394 unique proteins and 96 metabolites were differentially expressed under drought and/or among the three genotypes (wild type (WT), JAZ7 knock out (KO) and JAZ7 overexpression (OE)). Unique and differential proteins/metabolites after each comparison were analyzed to gauge their potential functions in drought tolerance. The proteins and metabolites are enriched in JA and abscisic acid (ABA) signaling pathways, response to stress, photosynthesis, redox and metabolic process. BIOLOGICAL
Drought stress is a global challenge that affects agricultural production. JAZ7 overexpression led to drought tolerance in A. thaliana through modulating photosynthesis, redox, and amino acids, phytohormones and defense metabolites. The results have provided important insights into the JAZ7 regulated molecular networks of drought tolerance. The knowledge may facilitate effort to enhance crop drought tolerance in the era of climate change.
This article was published in the following journal.
Name: Journal of proteomics
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Proteins that originate from plants species belonging to the genus ARABIDOPSIS. The most intensely studied species of Arabidopsis, Arabidopsis thaliana, is commonly used in laboratory experiments.
A plant genus of the family BRASSICACEAE that contains ARABIDOPSIS PROTEINS and MADS DOMAIN PROTEINS. The species A. thaliana is used for experiments in classical plant genetics as well as molecular genetic studies in plant physiology, biochemistry, and development.
An induced state of non-reactivity to grafted tissue from a donor organism that would ordinarily trigger a cell-mediated or humoral immune response.
A plant homeotic protein involved in the development of stamens and carpels of Arabidopsis thaliana. It is a DNA-binding protein that contains the MADS-box domain. It is one of the four founder proteins that structurally define the superfamily of MADS DOMAIN PROTEINS.
An Ig domain-containing membrane receptor that is expressed by TH1 CELLS. It regulates the activation of MACROPHAGES and inhibits TH1-mediated auto- and alloimmune responses to promote IMMUNE TOLERANCE.
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