We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.

Durham Research Online
You are in:

Impact of heat and drought stress on peroxisome proliferation in quinoa.

Hinojosa, Leonardo and Sanad, Marwa and Jarvis, David and Steel, Patrick and Murphy, Kevin and Smertenko, Andrei (2019) 'Impact of heat and drought stress on peroxisome proliferation in quinoa.', Plant journal., 99 (6). pp. 1144-1158.


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.

Item Type:Article
Full text:(AM) Accepted Manuscript
Download PDF
Full text:(AM) Accepted Manuscript
Download PDF (Summary tables)
Publisher Web site:
Publisher 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 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Date accepted:13 May 2019
Date deposited:28 May 2019
Date of first online publication:01 July 2019
Date first made open access:01 July 2020

Save or Share this output

Look up in GoogleScholar