Downregulation of PSII activity and increased cyclic electron transport in cotton prevents PSI from photoinhibition due to night chilling
The objective of this experiment was to study the effects of night chilling on the photosynthetic characteristics of cotton (Gossypium hirsutum L.) at a boll-forming stage. The results suggest that overreduction of PSII after night chilling (≤ 10°C) led to excess excitation energy in cotton leaves....
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Academy of Sciences of the Czech Republic, Institute of Experimental Botany
2019-05-01
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doaj-5ca77667673342618bcb87436d6233fb2020-11-25T03:28:53ZengAcademy of Sciences of the Czech Republic, Institute of Experimental BotanyPhotosynthetica0300-36041573-90582019-05-0157252353210.32615/ps.2019.072phs-201902-0032Downregulation of PSII activity and increased cyclic electron transport in cotton prevents PSI from photoinhibition due to night chillingF. XIAO0Y.L. ZHANG1Y.L. YANG2W.F. ZHANG3The College of Life Science, Shihezi University, 832003 Shihezi, ChinaKey Laboratory of Oasis EcoAgriculture, Xinjiang Production and Construction Group, Agricultural College, Shihezi University, Shihezi, 832003 Xinjiang, ChinaKey Laboratory of Oasis EcoAgriculture, Xinjiang Production and Construction Group, Agricultural College, Shihezi University, Shihezi, 832003 Xinjiang, ChinaKey Laboratory of Oasis EcoAgriculture, Xinjiang Production and Construction Group, Agricultural College, Shihezi University, Shihezi, 832003 Xinjiang, ChinaThe objective of this experiment was to study the effects of night chilling on the photosynthetic characteristics of cotton (Gossypium hirsutum L.) at a boll-forming stage. The results suggest that overreduction of PSII after night chilling (≤ 10°C) led to excess excitation energy in cotton leaves. The night chilling (compared to 22°C) reduced PSI acceptor side limitation under moderate and high light intensity and increased maximum photooxidizable P700. This suggests that in contrast to PSII, PSI was protected from photoinhibition due to night chilling. However, PSII activity and linear electron transport were not significantly affected by the 30/16°C treatment. In addition, the night chilling (≤ 10°C) increased the quantum yield of cyclic electron transport. This suggests that cyclic electron transport around PSI might be important to prevent photoinhibition of PSI and PSII in cotton under night chilling stress.https://ps.ueb.cas.cz/artkey/phs-201902-0032_downregulation-of-psii-activity-and-increased-cyclic-electron-transport-in-cotton-prevents-psi-from-photoinhibi.phpchlorophyll fluorescence; photoprotection; photosynthesis; stomatal limitation. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
F. XIAO Y.L. ZHANG Y.L. YANG W.F. ZHANG |
spellingShingle |
F. XIAO Y.L. ZHANG Y.L. YANG W.F. ZHANG Downregulation of PSII activity and increased cyclic electron transport in cotton prevents PSI from photoinhibition due to night chilling Photosynthetica chlorophyll fluorescence; photoprotection; photosynthesis; stomatal limitation. |
author_facet |
F. XIAO Y.L. ZHANG Y.L. YANG W.F. ZHANG |
author_sort |
F. XIAO |
title |
Downregulation of PSII activity and increased cyclic electron transport in cotton prevents PSI from photoinhibition due to night chilling |
title_short |
Downregulation of PSII activity and increased cyclic electron transport in cotton prevents PSI from photoinhibition due to night chilling |
title_full |
Downregulation of PSII activity and increased cyclic electron transport in cotton prevents PSI from photoinhibition due to night chilling |
title_fullStr |
Downregulation of PSII activity and increased cyclic electron transport in cotton prevents PSI from photoinhibition due to night chilling |
title_full_unstemmed |
Downregulation of PSII activity and increased cyclic electron transport in cotton prevents PSI from photoinhibition due to night chilling |
title_sort |
downregulation of psii activity and increased cyclic electron transport in cotton prevents psi from photoinhibition due to night chilling |
publisher |
Academy of Sciences of the Czech Republic, Institute of Experimental Botany |
series |
Photosynthetica |
issn |
0300-3604 1573-9058 |
publishDate |
2019-05-01 |
description |
The objective of this experiment was to study the effects of night chilling on the photosynthetic characteristics of cotton (Gossypium hirsutum L.) at a boll-forming stage. The results suggest that overreduction of PSII after night chilling (≤ 10°C) led to excess excitation energy in cotton leaves. The night chilling (compared to 22°C) reduced PSI acceptor side limitation under moderate and high light intensity and increased maximum photooxidizable P700. This suggests that in contrast to PSII, PSI was protected from photoinhibition due to night chilling. However, PSII activity and linear electron transport were not significantly affected by the 30/16°C treatment. In addition, the night chilling (≤ 10°C) increased the quantum yield of cyclic electron transport. This suggests that cyclic electron transport around PSI might be important to prevent photoinhibition of PSI and PSII in cotton under night chilling stress. |
topic |
chlorophyll fluorescence; photoprotection; photosynthesis; stomatal limitation. |
url |
https://ps.ueb.cas.cz/artkey/phs-201902-0032_downregulation-of-psii-activity-and-increased-cyclic-electron-transport-in-cotton-prevents-psi-from-photoinhibi.php |
work_keys_str_mv |
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