Efficient scavenging of reactive carbonyl species in chloroplasts is required for light acclimation and fitness of plants

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1979. - 240(2023), 2 vom: 17. Okt., Seite 676-693
1. Verfasser:	Ji, Daili (VerfasserIn)
Weitere Verfasser:	Luo, Manfei, Guo, Yinjie, Li, Qiuxin, Kong, Lingxi, Ge, Haitao, Wang, Qi, Song, Qiulai, Zeng, Xiannan, Ma, Jinfang, Wang, Yingchun, Meurer, Jörg, Chi, Wei
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2023
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't Arabidopsis light acclimation photosystem II (PSII) repair reactive carbonyl species (RCS) rice Arabidopsis Proteins Photosystem II Protein Complex

Beschreibung
Zusammenfassung:	© 2023 The Authors New Phytologist © 2023 New Phytologist Foundation. Reactive carbonyl species (RCS) derived from lipid peroxides can act as critical damage or signaling mediators downstream of reactive oxygen species by modifying target proteins. However, their biological effects and underlying mechanisms remain largely unknown in plants. Here, we have uncovered the mechanism by which the RCS 4-hydroxy-(E)-2-nonenal (HNE) participates in photosystem II (PSII) repair cycle of chloroplasts, a crucial process for maintaining PSII activity under high and changing light conditions. High Light Sensitive 1 (HLT1) is a potential NADPH-dependent reductase in chloroplasts. Deficiency of HLT1 had no impact on the growth of Arabidopsis plants under normal light conditions but increased sensitivity to high light, which resulted from a defective PSII repair cycle. In hlt1 plants, the accumulation of HNE-modified D1 subunit of PSII was observed, which did not affect D1 degradation but hampered the dimerization of repaired PSII monomers and reassembly of PSII supercomplexes on grana stacks. HLT1 is conserved in all photosynthetic organisms and has functions in overall growth and plant fitness in both Arabidopsis and rice under naturally challenging field conditions. Our work provides the mechanistic basis underlying RCS scavenging in light acclimation and suggests a potential strategy to improve plant productivity by manipulating RCS signaling in chloroplasts
Beschreibung:	Date Completed 22.09.2023 Date Revised 24.09.2023 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.19156