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Functional Plant Biology Functional Plant Biology Society
Plant function and evolutionary biology
RESEARCH ARTICLE

Crucial role of Arabidopsis glutaredoxin S17 in heat stress response revealed by transcriptome analysis

Xiaolan Rao A § , Ninghui Cheng https://orcid.org/0000-0002-0765-5507 B § * , Iny E. Mathew B , Kendal D. Hirschi B and Paul A. Nakata B *
+ Author Affiliations
- Author Affiliations

A State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan 430062, P. R. China.

B USDA/ARS Children’s Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA.

* Correspondence to: ncheng@bcm.edu, paul.nakata@usda.gov

Handling Editor: Thomas Roberts

Functional Plant Biology 50(1) 58-70 https://doi.org/10.1071/FP22002
Submitted: 5 January 2022  Accepted: 21 August 2022   Published: 14 September 2022

© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Heat stress can have detrimental effects on plant growth and development. However, the mechanisms by which the plant is able to perceive changes in ambient temperature, transmit this information, and initiate a temperature-induced response are not fully understood. Previously, we showed that heterologous expression of an Arabidopsis thaliana L. monothiol glutaredoxin AtGRXS17 enhances thermotolerance in various crops, while disruption of AtGRXS17 expression caused hypersensitivity to permissive temperature. In this study, we extend our investigation into the effect of AtGRXS17 and heat stress on plant growth and development. Although atgrxs17 plants were found to exhibit a slight decrease in hypocotyl elongation, shoot meristem development, and root growth compared to wild-type when grown at 22°C, these growth phenotypic differences became more pronounced when growth temperatures were raised to 28°C. Transcriptome analysis revealed significant changes in genome-wide gene expression in atgrxs17 plants compared to wild-type under conditions of heat stress. The expression of genes related to heat stress factors, auxin response, cellular communication, and abiotic stress were altered in atgrxs17 plants in response to heat stress. Overall, our findings indicate that AtGRXS17 plays a critical role in controlling the transcriptional regulation of plant heat stress response pathways.

Keywords: Arabidopsis, auxin response, cellular signalling, global warming, glutaredoxin, heat stress factor, redox regulation, transcriptome.


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