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Ascorbic Acid Alleviates Damage from Heat Stress in the Photosystem II of Tall Fescue in Both the Photochemical and Thermal Phases

L-Ascorbate (Asc) plays important roles in plant development, hormone signaling, the cell cycle and cellular redox system, etc. The higher content of Asc in plant chloroplasts indicates its important role in the photosystem. The objective of this study was to study the roles of Asc in tall fescue le...

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Autores principales: Chen, Ke, Zhang, Minna, Zhu, Huihui, Huang, Meiyu, Zhu, Qing, Tang, Diyong, Han, Xiaole, Li, Jinlin, Sun, Jie, Fu, Jinmin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5550716/
https://www.ncbi.nlm.nih.gov/pubmed/28848577
http://dx.doi.org/10.3389/fpls.2017.01373
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author Chen, Ke
Zhang, Minna
Zhu, Huihui
Huang, Meiyu
Zhu, Qing
Tang, Diyong
Han, Xiaole
Li, Jinlin
Sun, Jie
Fu, Jinmin
author_facet Chen, Ke
Zhang, Minna
Zhu, Huihui
Huang, Meiyu
Zhu, Qing
Tang, Diyong
Han, Xiaole
Li, Jinlin
Sun, Jie
Fu, Jinmin
author_sort Chen, Ke
collection PubMed
description L-Ascorbate (Asc) plays important roles in plant development, hormone signaling, the cell cycle and cellular redox system, etc. The higher content of Asc in plant chloroplasts indicates its important role in the photosystem. The objective of this study was to study the roles of Asc in tall fescue leaves against heat stress. After a heat stress treatment, we observed a lower value of the maximum quantum yield for primary photochemistry (φ(Po)), which reflects the inhibited activity of the photochemical phase of photosystem II (PSII). Moreover, we observed a higher value of efficiency of electron transfer from Q(B) to photosystem I acceptors (δ(R0)), which reflects elevated activity of the thermal phase of the photosystem of the tall fescue. The addition of Asc facilitate the behavior of the photochemical phase of the PSII by lowering the ROS content as well as that of the alternative electron donor to provide electron to the tyrosine residue of the D1 protein. Additionally, exogenous Asc reduces the activity of the thermal phase of the photosystem, which could contribute to the limitation of energy input into the photosystem in tall fescue against heat stress. Synthesis of the Asc increased under heat stress treatment. However, under heat stress this regulation does not occur at the transcription level and requires further study.
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spelling pubmed-55507162017-08-28 Ascorbic Acid Alleviates Damage from Heat Stress in the Photosystem II of Tall Fescue in Both the Photochemical and Thermal Phases Chen, Ke Zhang, Minna Zhu, Huihui Huang, Meiyu Zhu, Qing Tang, Diyong Han, Xiaole Li, Jinlin Sun, Jie Fu, Jinmin Front Plant Sci Plant Science L-Ascorbate (Asc) plays important roles in plant development, hormone signaling, the cell cycle and cellular redox system, etc. The higher content of Asc in plant chloroplasts indicates its important role in the photosystem. The objective of this study was to study the roles of Asc in tall fescue leaves against heat stress. After a heat stress treatment, we observed a lower value of the maximum quantum yield for primary photochemistry (φ(Po)), which reflects the inhibited activity of the photochemical phase of photosystem II (PSII). Moreover, we observed a higher value of efficiency of electron transfer from Q(B) to photosystem I acceptors (δ(R0)), which reflects elevated activity of the thermal phase of the photosystem of the tall fescue. The addition of Asc facilitate the behavior of the photochemical phase of the PSII by lowering the ROS content as well as that of the alternative electron donor to provide electron to the tyrosine residue of the D1 protein. Additionally, exogenous Asc reduces the activity of the thermal phase of the photosystem, which could contribute to the limitation of energy input into the photosystem in tall fescue against heat stress. Synthesis of the Asc increased under heat stress treatment. However, under heat stress this regulation does not occur at the transcription level and requires further study. Frontiers Media S.A. 2017-08-08 /pmc/articles/PMC5550716/ /pubmed/28848577 http://dx.doi.org/10.3389/fpls.2017.01373 Text en Copyright © 2017 Chen, Zhang, Zhu, Huang, Zhu, Tang, Han, Li, Sun and Fu. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Chen, Ke
Zhang, Minna
Zhu, Huihui
Huang, Meiyu
Zhu, Qing
Tang, Diyong
Han, Xiaole
Li, Jinlin
Sun, Jie
Fu, Jinmin
Ascorbic Acid Alleviates Damage from Heat Stress in the Photosystem II of Tall Fescue in Both the Photochemical and Thermal Phases
title Ascorbic Acid Alleviates Damage from Heat Stress in the Photosystem II of Tall Fescue in Both the Photochemical and Thermal Phases
title_full Ascorbic Acid Alleviates Damage from Heat Stress in the Photosystem II of Tall Fescue in Both the Photochemical and Thermal Phases
title_fullStr Ascorbic Acid Alleviates Damage from Heat Stress in the Photosystem II of Tall Fescue in Both the Photochemical and Thermal Phases
title_full_unstemmed Ascorbic Acid Alleviates Damage from Heat Stress in the Photosystem II of Tall Fescue in Both the Photochemical and Thermal Phases
title_short Ascorbic Acid Alleviates Damage from Heat Stress in the Photosystem II of Tall Fescue in Both the Photochemical and Thermal Phases
title_sort ascorbic acid alleviates damage from heat stress in the photosystem ii of tall fescue in both the photochemical and thermal phases
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5550716/
https://www.ncbi.nlm.nih.gov/pubmed/28848577
http://dx.doi.org/10.3389/fpls.2017.01373
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