Cold tolerance of photosynthetic electron transport system is enhanced in wheat plants grown under elevated CO₂

TY - JOUR

T1 - Cold tolerance of photosynthetic electron transport system is enhanced in wheat plants grown under elevated CO2

AU - Zhu, Xiancan

AU - Liu, Shengqun

AU - Sun, Luying

AU - Song, Fengbin

AU - Liu, Fulai

AU - Li, Xiangnan

PY - 2018

Y1 - 2018

N2 - The effects of CO2 elevation on sensitivity of photosynthetic electron transport system of wheat in relation to low temperature stress are unclear. The performance of photosynthetic electron transport system and antioxidant system in chloroplasts was investigated in a temperature sensitive wheat cultivar Lianmai6 grown under the combination of low temperature (2 days at 2/−1◦ C in the day/night) and CO2 elevation (800 µmol l−1). It was found that CO2 elevation increased the efficiency of photosynthetic electron transport in wheat exposed to low temperature stress, which was related to the enhanced maximum quantum yield for electron transport beyond QA and the increased quantum yield for reduction of end electron acceptors at the PSI acceptor side in plants under elevated CO2. Also, under low temperature, the activities of ATPases, ascorbate peroxidase, and catalase in chloroplasts were enhanced in wheat under elevated CO2. It suggested that the cold tolerance of photosynthetic electron transport system is enhanced by CO2 elevation.

AB - The effects of CO2 elevation on sensitivity of photosynthetic electron transport system of wheat in relation to low temperature stress are unclear. The performance of photosynthetic electron transport system and antioxidant system in chloroplasts was investigated in a temperature sensitive wheat cultivar Lianmai6 grown under the combination of low temperature (2 days at 2/−1◦ C in the day/night) and CO2 elevation (800 µmol l−1). It was found that CO2 elevation increased the efficiency of photosynthetic electron transport in wheat exposed to low temperature stress, which was related to the enhanced maximum quantum yield for electron transport beyond QA and the increased quantum yield for reduction of end electron acceptors at the PSI acceptor side in plants under elevated CO2. Also, under low temperature, the activities of ATPases, ascorbate peroxidase, and catalase in chloroplasts were enhanced in wheat under elevated CO2. It suggested that the cold tolerance of photosynthetic electron transport system is enhanced by CO2 elevation.

KW - Chlorophyll a fluorescence

KW - CO elevation

KW - Cold tolerance

KW - Photosynthesis

KW - Triticum aestivum

U2 - 10.3389/fpls.2018.00933

DO - 10.3389/fpls.2018.00933

M3 - Journal article

C2 - 30022988

AN - SCOPUS:85050823612

SN - 1664-462X

VL - 9

SP - 1

EP - 8

JO - Frontiers in Plant Science

JF - Frontiers in Plant Science

M1 - 933

ER -