Impact of heat and drought stress on peroxisome proliferation in quinoa

Hinojosa, Leonardo; Sanad, Marwa; Jarvis, David; Steel, Patrick; Murphy, Kevin; Smertenko, Andrei

doi:10.1111/tpj.14411

Impact of heat and drought stress on peroxisome proliferation in quinoa

Hinojosa, Leonardo; Sanad, Marwa; Jarvis, David; Steel, Patrick; Murphy, Kevin; Smertenko, Andrei

Authors

Leonardo Hinojosa

Marwa Sanad

David Jarvis

Professor Patrick Steel p.g.steel@durham.ac.uk
Professor

Kevin Murphy

Andrei Smertenko

Abstract

Although peroxisomes play a key role in plant metabolism under both normal and stressful growth conditions, the impact of drought and heat stress on the peroxisomes remains unknown. Quinoa represents an informative system for dissecting the impact of abiotic stress on peroxisome proliferation because it is adapted to marginal environments. Here we determined the correlation of peroxisome abundance with physiological responses and yield under heat, drought, and heat plus drought combination stresses in eight genotypes of quinoa. We found that all stresses caused a reduction in stomatal conductance and yield. Furthermore, H2O2 content increased under drought and heat plus drought. Principal component analysis demonstrated that peroxisome abundance correlated positively with H2O2 content in leaves and correlated negatively with yield. Person correlation coefficient for yield and peroxisome abundance (r=‐0.59) was higher than for commonly used photosynthetic efficiency (r=0.23), but comparable to those for classical stress indicators such as soil moisture content (r=0.51) or stomatal conductance (r=0.62). Our work established peroxisome abundance as a sensitive parameter for responses to heat and drought stress in the genetically diverse populations. As heat waves threaten agricultural productivity in arid climates, our findings will facilitate identification of genetic markers for improving yield of crops under extreme weather patterns.

Citation

Hinojosa, L., Sanad, M., Jarvis, D., Steel, P., Murphy, K., & Smertenko, A. (2019). Impact of heat and drought stress on peroxisome proliferation in quinoa. The Plant Journal, 99(6), 1144-1158. https://doi.org/10.1111/tpj.14411

Journal Article Type	Article
Acceptance Date	May 13, 2019
Online Publication Date	Jul 1, 2019
Publication Date	Sep 30, 2019
Deposit Date	May 28, 2019
Publicly Available Date	Jul 1, 2020
Journal	Plant Journal
Print ISSN	0960-7412
Electronic ISSN	1365-313X
Publisher	Wiley
Peer Reviewed	Peer Reviewed
Volume	99
Issue	6
Pages	1144-1158
DOI	https://doi.org/10.1111/tpj.14411

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Copyright Statement
This is the accepted version of the following article: Hinojosa, Leonardo, Sanad, Marwa, Jarvis, David, Steel, Patrick, Murphy, Kevin & Smertenko, Andrei (2019). Impact of heat and drought stress on peroxisome proliferation in quinoa. The Plant Journal 99(6): 1144-1158, which has been published in final form at https://doi.org/10.1111/tpj.14411. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.