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PSI-driven cyclic electron flow partially alleviates the peroxidation of red alga Gelidium amansii (Gelidiaceae) caused by temporary high temperature
Li, Yongfu1,2,3; Liu, Jianguo1,2,3; Zhang, Litao1,2,3
2021-09-16
Source PublicationJOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN2096-5508
Pages10
Corresponding AuthorLiu, Jianguo(jgliu@qdio.ac.cn)
AbstractPSI-driven cyclic electron flow (CEF-I) helps higher plants avoid severe heat damage. Gelidium amansii, a red seaweed used in the production of agar, inhabits subtidal rocks but can be found in the intertidal zone. The biological role of CEF-I is still unclear in this organism. Wild G. amansii was exposed to 30 degrees C heat stress for 12 h with continuous lighting. The results showed that treatment at 30 degrees C gradually decreased maximal PSII photochemical efficiency (F-v/F-m), linear electron transfer rate, and activity of photosynthetic reaction center. Both the maximal photochemical efficiency under light (F-v '/F-m ') and maximum quantum yield of light-adapted PSII (phi(PSII)) were maintained at a relatively stable level during the initial 6 h and then significantly decreased at 12 h. The up-regulated CEF-I helps to enhance proton gradient transfer across thylakoid membrane to protect oxygen-evolving complex against heat damage. Following the addition of a CEF-I inhibitor to plants, the F-v/F-m greatly decreased, suggesting that the CEF-I alleviates degree of photoinhibition caused by strong light. The results of measurement of antioxidant enzymes, including superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT), and the contents of H2O2 and malonaldehyde (MDA) provided additional evidence that CEF-I plays a protective role to a certain extent for G. amansii to manage stress at 30 degrees C. Therefore, it can be concluded that CEF-I enables G. amansii to survive in intertidal zones by protecting it from the heat damage caused by high temperature stress.
Keywordcyclic electron flow Gelidium amansii heat stress chlorophyll fluorescence quantum yield natural distribution
DOI10.1007/s00343-021-0452-z
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2019YFD0900700]
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000696496400004
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/176413
Collection实验海洋生物学重点实验室
Corresponding AuthorLiu, Jianguo
Affiliation1.Chinese Acad Sci, Ctr Ocean Megasci, Inst Oceanol, CAS, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Shandong Prov Key Lab Expt Marine Biol, Inst Oceanol, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
3.Pilot Natl Lab Marine Sci & Technol Qingdao, Marine Biol & Biotechnol Lab, Qingdao 266237, Peoples R China
First Author AffilicationCenter for Ocean Mega-Science, Chinese Academy of Sciences
Corresponding Author AffilicationCenter for Ocean Mega-Science, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li, Yongfu,Liu, Jianguo,Zhang, Litao. PSI-driven cyclic electron flow partially alleviates the peroxidation of red alga Gelidium amansii (Gelidiaceae) caused by temporary high temperature[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2021:10.
APA Li, Yongfu,Liu, Jianguo,&Zhang, Litao.(2021).PSI-driven cyclic electron flow partially alleviates the peroxidation of red alga Gelidium amansii (Gelidiaceae) caused by temporary high temperature.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,10.
MLA Li, Yongfu,et al."PSI-driven cyclic electron flow partially alleviates the peroxidation of red alga Gelidium amansii (Gelidiaceae) caused by temporary high temperature".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2021):10.
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