Molecular and physiological responses during thermal acclimation of leaf photosynthesis and respiration in rice

AbstractTo further our understanding of how sustained changes in temperature affect the carbon economy of rice (Oryza sativa), hydroponically grown plants of the IR64 cultivar were developed at 30°C/25°C (day/night) before being shifted to 25/20°C or 40/35°C. Leaf messenger RNA and protein abundance, sugar and starch concentrations, and gas‐exchange and elongation rates were measured on preexisting leaves (PE) already developed at 30/25°C or leaves newly developed (ND) subsequent to temperature transfer. Following a shift in growth temperature, there was a transient adjustment in metabolic gene transcript abundance of PE leaves before homoeostasis was reached within 24 hr, aligning with Rdark (leaf dark respiratory CO2 release) and An (net CO2 assimilation) changes. With longer exposure, the central respiratory protein cytochrome c oxidase (COX) declined in abundance at 40/35°C. In contrast to Rdark, An was maintained across the three growth temperatures in ND leaves. Soluble sugars did not differ significantly with growth temperature, and growth was fastest with extended exposure at 40/35°C. The results highlight that acclimation of photosynthesis and respiration is asynchronous in rice, with heat‐acclimated plants exhibiting a striking ability to maintain net carbon gain and growth when exposed to heat‐wave temperatures, even while reducing investment in energy‐conserving respiratory pathways.

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Cited By

29

How rice adapts to high temperatures

Huimin Ren, Jingpei Bao · 2023

Frontiers in Plant Science

Metrics

29

Citations

88

References

Details

Published: Jan 10, 2020
Vol/Issue: 43(3)
Pages: 594-610
License: View

Authors

F

Fatimah Azzahra Ahmad Rashid

Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology The Australian National University Canberra Australian Capital Territory Australia; Department of Biology, Faculty of Science and Mathematics Sultan Idris Education University Tanjung Malim Malaysia

P

Peter A. Crisp

Department of Plant and Microbial Biology University of Minnesota Saint Paul Minnesota

Y

You Zhang

CSIRO Plant Industry Canberra Australian Capital Territory Australia

O

Oliver Berkowitz

Australian Research Council Centre of Excellence in Plant Energy Biology, School of Life Science, AgriBio Building La Trobe University Melbourne Victoria Australia

B

Barry J. Pogson

Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology The Australian National University Canberra Australian Capital Territory Australia

D

David A. Day

College of Science and Engineering Flinders University Adelaide South Australia Australia; Department of Animal, Plant and Soil Sciences, AgriBio Building La Trobe University Melbourne Victoria Australia

J

Josette Masle

Research School of Biology The Australian National University Canberra Australia

R

Roderick C. Dewar

Research School of Biology The Australian National University Canberra Australia; Institute for Atmospheric and Earth System Research/Physics University of Helsinki Helsinki Finland

J

James Whelan

Australian Research Council Centre of Excellence in Plant Energy Biology, School of Life Science, AgriBio Building La Trobe University Melbourne Victoria Australia

O

Owen K. Atkin

Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology The Australian National University Canberra Australian Capital Territory Australia

A

Andrew P. Scafaro

Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology The Australian National University Canberra Australian Capital Territory Australia

Funding

Australian Research Council Award: CE140100008

Centre of Excellence in Plant Energy Biology, Australian Research Council Award: CE140100008

Cite This Article

Fatimah Azzahra Ahmad Rashid, Peter A. Crisp, You Zhang, et al. (2020). Molecular and physiological responses during thermal acclimation of leaf photosynthesis and respiration in rice. Plant, Cell & Environment, 43(3), 594-610. https://doi.org/10.1111/pce.13706

Molecular and physiological responses during thermal acclimation of leaf photosynthesis and respiration in rice

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