PMID- 28199904
OWN - NLM
STAT- MEDLINE
DCOM- 20170626
LR  - 20220321
IS  - 1618-1328 (Electronic)
IS  - 0176-1617 (Linking)
VI  - 211
DP  - 2017 Apr
TI  - Cyclic electron flow may provide some protection against PSII photoinhibition in 
      rice (Oryza sativa L.) leaves under heat stress.
PG  - 138-146
LID - S0176-1617(17)30032-9 [pii]
LID - 10.1016/j.jplph.2017.01.007 [doi]
AB  - Previously we have shown that a quick down-regulation in PSI activity compares to 
      that of PSII following short-term heat stress for two rice groups including C4023 
      and Q4149, studied herein. These accessions were identified to have different 
      natural capacities in driving cyclic electron flow (CEF) around PSI; i.e., low 
      CEF (lcef) and high CEF (hcef) for C4023 and Q4149, respectively. The aim of this 
      study was to investigate whether these two lines have different mechanisms of 
      protecting photosystem II from photodamage under heat stress. We observed a 
      stepwise alteration in the shape of Chl a fluorescence induction (OJIP) with 
      increasing temperature treatment. The effect of 44 degrees C treatment on the damping in 
      Chl a fluorescence was more pronounced in C4023 than in Q4149. Likewise, we noted 
      a disruption in the I-step, a decline in the F(v) due to a strong damping in the 
      F(m), and a slight increase in the F(0). Normalized data demonstrated that the 
      I-step seems more susceptible to 44 degrees C in C4023 than in Q4149. We also measured 
      the redox states of plastocyanin (PC) and P(700) by monitoring the transmission 
      changes at 820nm (I(820)), and observed a disturbance in the oxidation/reduction 
      kinetics of PC and P(700). The decline in the amplitude of their oxidation was 
      shown to be about 29% and 13% for C4023 and Q4149, respectively. The 
      electropotential component (Deltaphi) of ms-DLE appeared more sensitive to temperature 
      stress than the chemical component (DeltapH), and the impact of heat was more evident 
      and drastic in C4023 than in Q4149. Under heat stress, we noticed a concomitant 
      decline in the primary photochemistry of PSII as well as in both the membrane 
      energization process and the lumen protonation for both accessions, and it is 
      evident that heat affects these parameters more in C4023 than in Q4149. All these 
      data suggest that higher CET can confer higher photoprotection to PSII in rice 
      lines, which can be a desirable trait during rice breeding, especially in the 
      context of a "warming" world.
CI  - Copyright (c) 2017 The Authors. Published by Elsevier GmbH.. All rights reserved.
FAU - Essemine, Jemaa
AU  - Essemine J
AD  - CAS-Key Laboratory for Computational Biology and State Key Laboratory for Hybrid 
      Rice, Partner Institute for Computational Biology, Shanghai Institute for 
      Biological Sciences, Chinese Academy of Sciences, Shanghai, China.
FAU - Xiao, Yi
AU  - Xiao Y
AD  - CAS-Key Laboratory for Computational Biology and State Key Laboratory for Hybrid 
      Rice, Partner Institute for Computational Biology, Shanghai Institute for 
      Biological Sciences, Chinese Academy of Sciences, Shanghai, China.
FAU - Qu, Mingnan
AU  - Qu M
AD  - CAS-Key Laboratory for Computational Biology and State Key Laboratory for Hybrid 
      Rice, Partner Institute for Computational Biology, Shanghai Institute for 
      Biological Sciences, Chinese Academy of Sciences, Shanghai, China.
FAU - Mi, Hualing
AU  - Mi H
AD  - National Key Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant 
      Physiology and Ecology, Chinese Academy of Sciences, Shanghai, China.
FAU - Zhu, Xin-Guang
AU  - Zhu XG
AD  - CAS-Key Laboratory for Computational Biology and State Key Laboratory for Hybrid 
      Rice, Partner Institute for Computational Biology, Shanghai Institute for 
      Biological Sciences, Chinese Academy of Sciences, Shanghai, China. Electronic 
      address: zhuxinguang@picb.ac.cn.
LA  - eng
PT  - Journal Article
DEP - 20170130
PL  - Germany
TA  - J Plant Physiol
JT  - Journal of plant physiology
JID - 9882059
RN  - 0 (Photosystem II Protein Complex)
RN  - 1406-65-1 (Chlorophyll)
RN  - YF5Q9EJC8Y (Chlorophyll A)
SB  - IM
MH  - Chlorophyll/metabolism
MH  - Chlorophyll A
MH  - Darkness
MH  - Ecotype
MH  - Electron Transport
MH  - Fluorescence
MH  - Heat-Shock Response/*physiology
MH  - Hot Temperature
MH  - Kinetics
MH  - Oryza/*physiology
MH  - *Photochemical Processes
MH  - Photosystem II Protein Complex/*metabolism
MH  - Plant Leaves/*physiology
MH  - Quantum Theory
MH  - *Stress, Physiological
OTO - NOTNLM
OT  - Cyclic electron flow
OT  - Fluorescence induction
OT  - Heat stress
OT  - Photoinhibition
OT  - Photosynthesis
OT  - Rice
EDAT- 2017/02/16 06:00
MHDA- 2017/06/27 06:00
CRDT- 2017/02/16 06:00
PHST- 2016/11/01 00:00 [received]
PHST- 2016/12/24 00:00 [revised]
PHST- 2017/01/20 00:00 [accepted]
PHST- 2017/02/16 06:00 [pubmed]
PHST- 2017/06/27 06:00 [medline]
PHST- 2017/02/16 06:00 [entrez]
AID - S0176-1617(17)30032-9 [pii]
AID - 10.1016/j.jplph.2017.01.007 [doi]
PST - ppublish
SO  - J Plant Physiol. 2017 Apr;211:138-146. doi: 10.1016/j.jplph.2017.01.007. Epub 
      2017 Jan 30.