Thioredoxin-like protein CDSP32 alleviates Cd-induced photosynthetic inhibition in tobacco leaves by regulating cyclic electron flow and excess energy dissipation

Thioredoxin-like protein CDSP32 alleviates Cd-induced photosynthetic inhibition in tobacco leaves by regulating cyclic electron flow and excess energy dissipation

Copyright © 2021 Elsevier Masson SAS. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Plant physiology and biochemistry : PPB. - 1991. - 167(2021) vom: 01. Okt., Seite 831-839
1. Verfasser: Zhang, Huihui (VerfasserIn)
Weitere Verfasser: Liu, Xiaoqian, Zhang, Hongbo, Wang, Yue, Li, Tong, Che, Yanhui, Wang, Jiechen, Guo, Dandan, Sun, Guangyu, Li, Xin
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Plant physiology and biochemistry : PPB
Schlagworte:Journal Article Cadmium Photoprotective Proteomic Tobacco Trx CDSP32 Photosystem I Protein Complex Photosystem II Protein Complex 00BH33GNGH Chlorophyll mehr... 1406-65-1 Thioredoxins 52500-60-4
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245 1 0 |a Thioredoxin-like protein CDSP32 alleviates Cd-induced photosynthetic inhibition in tobacco leaves by regulating cyclic electron flow and excess energy dissipation 
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500 |a Date Completed 13.10.2021 
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520 |a Thioredoxin-like protein CDSP32 (Trx CDSP32), a thioredoxin-like (Trx-like) protein located in the chloroplast, can regulate photosynthesis and the redox state of plants under stress. In order to examine the role of Trx CDSP32 in the photosynthetic apparatus of plants exposed to cadmium (Cd), the effects of Trx CDSP32 on photosynthetic function and photoprotection in tobacco leaves under Cd exposure were studied using a proteomics approach with wild-type (WT) and Trx CDSP32 overexpression (OE) tobacco plants. Cd exposure reduced stomatal conductance, blocked PSII photosynthetic electron transport, and inhibited carbon assimilation. Increased water use efficiency (WUE), cyclic electron flow (CEF) of the proton gradient regulation 5 pathway (PGR5-CEF), and regulated energy dissipation [Y(NPQ)] are important mechanisms of Cd adaptation. However, CEF of the NAD(P)H dehydrogenase pathway (NDH-CEF) was inhibited by Cd exposure. Relative to control conditions, the expression levels of violaxanthin de-epoxidase (VDE) and photosystem II 22 kDa protein (PsbS) in OE leaves were significantly increased under Cd exposure, but those in WT leaves did not change significantly. Moreover, the expression of zeaxanthin epoxidase (ZE) under Cd exposure was significantly higher than that in WT leaves. Thus, Trx CDSP32 increased Y(NPQ) and alleviated PSII photoinhibition under Cd exposure. Trx CDSP32 not only increased PGR5-like protein 1A and 1B expression, but also alleviated the down-regulation of NAD(P)H-quinone oxidoreductase subunits induced by Cd exposure. Thus, Trx CDSP32 promotes CEF in Cd-exposed tobacco leaves. Thus, Trx CDSP32 alleviates the Cd-induced photoinhibition in tobacco leaves by regulating two photoprotective mechanisms: CEF and xanthophyll cycle-dependent energy dissipation 
650 4 |a Journal Article 
650 4 |a Cadmium 
650 4 |a Photoprotective 
650 4 |a Proteomic 
650 4 |a Tobacco 
650 4 |a Trx CDSP32 
650 7 |a Photosystem I Protein Complex  |2 NLM 
650 7 |a Photosystem II Protein Complex  |2 NLM 
650 7 |a Cadmium  |2 NLM 
650 7 |a 00BH33GNGH  |2 NLM 
650 7 |a Chlorophyll  |2 NLM 
650 7 |a 1406-65-1  |2 NLM 
650 7 |a Thioredoxins  |2 NLM 
650 7 |a 52500-60-4  |2 NLM 
700 1 |a Liu, Xiaoqian  |e verfasserin  |4 aut 
700 1 |a Zhang, Hongbo  |e verfasserin  |4 aut 
700 1 |a Wang, Yue  |e verfasserin  |4 aut 
700 1 |a Li, Tong  |e verfasserin  |4 aut 
700 1 |a Che, Yanhui  |e verfasserin  |4 aut 
700 1 |a Wang, Jiechen  |e verfasserin  |4 aut 
700 1 |a Guo, Dandan  |e verfasserin  |4 aut 
700 1 |a Sun, Guangyu  |e verfasserin  |4 aut 
700 1 |a Li, Xin  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Plant physiology and biochemistry : PPB  |d 1991  |g 167(2021) vom: 01. Okt., Seite 831-839  |w (DE-627)NLM098178261  |x 1873-2690  |7 nnns 
773 1 8 |g volume:167  |g year:2021  |g day:01  |g month:10  |g pages:831-839 
856 4 0 |u http://dx.doi.org/10.1016/j.plaphy.2021.09.016  |3 Volltext 
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