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Photosynthetic regulation in response to fluctuating light conditions under temperature stress in three mosses with different light requirements
Lei,Yan-Bao; Xia,Hong-Xia; Chen,Ke; Plenkovic-Moraj,Andelka; Huang,Wei; Sun,Geng
2021
Source PublicationPLANT SCIENCE
ISSN0168-9452
Volume311Pages:111020
AbstractUnder natural field conditions, mosses experience fluctuating light intensities combined with temperature stress. Alternative electron flow mediated by flavodiiron proteins (FLVs) and cyclic electron flow (CEF) around photosystem I (PSI) allow mosses to growth under fluctuating light conditions. However, little is known about the roles of FLVs and CEF in the regulation of photosynthesis under temperature stress combined with fluctuating light. Here, we measured chlorophyll fluorescence and P700 redox state under fluctuating light conditions at 4 degrees C, 20 degrees C, and 35 degrees C in three mosses with different light requirements. Upon a sudden increase in light intensity, electron flow from photosystem II initially increased and then gradually decreased at 20 degrees C and 35 degrees C, indicating that the operation of FLV-dependent flow lasted much longer than previously thought. Furthermore, the absolute rates of FLV-dependent flow and CEF were enhanced under fluctuating light at 35 degrees C, pointing to their important roles in photoprotection when exposed to fluctuating light at moderate high temperature. Furthermore, the downregulation of FLV activity at 4 degrees C was partially compensated for by enhanced CEF activity. These results suggested the subtle coordination between FLV activity and CEF under fluctuating light and temperature stress. Racomitrium japonicum and Hypnum plumaeforme, which usually grow under relatively high light levels, exhibited higher FLV activity and CEF than the shade-grown moss Plagiomnium ellipticum. Based on our results, we conclude that photosynthetic acclimation to fluctuating light and temperature stress in different mosses is largely linked to the adjustment of FLV activity and CEF.
KeywordPhotosynthesis Cyclic electron transport Flavodiiron proteins Photoprotection Photosynthetic acclimation CYCLIC ELECTRON FLOW PHOTOSYSTEM-I FLAVODIIRON PROTEINS FLUORESCENCE PSI PHOTOINHIBITION PHOTOPROTECTION TRANSPORT PROTON GROWTH
DOI10.1016/j.plantsci.2021.111020
WOS IDWOS:000692238700005
Citation statistics
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/73306
Collection中国科学院昆明植物研究所
Affiliation1.Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Chengdu Inst Biol, Biodivers Conservat Key Lab Sichuan Prov, Chengdu 610041, Peoples R China
3.Chinese Acad Sci, Chengdu Inst Biol, China Croatia Belt & Rd Joint Lab Biodivers & Eco, Chengdu 610041, Peoples R China
4.Southwest Univ Sci & Technol, Sch Life Sci & Engn, Mianyang 621010, Sichuan, Peoples R China
5.Univ Zagreb, Fac Sci, Dept Biol, Rooseveltov Trg 6, Zagreb 10000, Croatia
6.Chinese Acad Sci, Kunming Inst Bot, Kunming 650201, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Lei,Yan-Bao,Xia,Hong-Xia,Chen,Ke,et al. Photosynthetic regulation in response to fluctuating light conditions under temperature stress in three mosses with different light requirements[J]. PLANT SCIENCE,2021,311:111020.
APA Lei,Yan-Bao,Xia,Hong-Xia,Chen,Ke,Plenkovic-Moraj,Andelka,Huang,Wei,&Sun,Geng.(2021).Photosynthetic regulation in response to fluctuating light conditions under temperature stress in three mosses with different light requirements.PLANT SCIENCE,311,111020.
MLA Lei,Yan-Bao,et al."Photosynthetic regulation in response to fluctuating light conditions under temperature stress in three mosses with different light requirements".PLANT SCIENCE 311(2021):111020.
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