Photosystem I Inhibition, Protection and Signalling: Knowns and Unknowns

Photosynthesis is the process that harnesses, converts and stores light energy in the form of chemical energy in bonds of organic compounds. Oxygenic photosynthetic organisms (i.e., plants, algae and cyanobacteria) employ an efficient apparatus to split water and transport electrons to high-energy e...

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Autores principales:	Yugo Lima-Melo, Mehmet Kılıç, Eva-Mari Aro, Peter J. Gollan
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	PSI photoinhibition P700 electron transport ROS metabolism Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/b747acf344a645189230be22c4d14333
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id	oai:doaj.org-article:b747acf344a645189230be22c4d14333
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spelling	oai:doaj.org-article:b747acf344a645189230be22c4d143332021-12-01T22:26:40ZPhotosystem I Inhibition, Protection and Signalling: Knowns and Unknowns1664-462X10.3389/fpls.2021.791124https://doaj.org/article/b747acf344a645189230be22c4d143332021-12-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fpls.2021.791124/fullhttps://doaj.org/toc/1664-462XPhotosynthesis is the process that harnesses, converts and stores light energy in the form of chemical energy in bonds of organic compounds. Oxygenic photosynthetic organisms (i.e., plants, algae and cyanobacteria) employ an efficient apparatus to split water and transport electrons to high-energy electron acceptors. The photosynthetic system must be finely balanced between energy harvesting and energy utilisation, in order to limit generation of dangerous compounds that can damage the integrity of cells. Insight into how the photosynthetic components are protected, regulated, damaged, and repaired during changing environmental conditions is crucial for improving photosynthetic efficiency in crop species. Photosystem I (PSI) is an integral component of the photosynthetic system located at the juncture between energy-harnessing and energy consumption through metabolism. Although the main site of photoinhibition is the photosystem II (PSII), PSI is also known to be inactivated by photosynthetic energy imbalance, with slower reactivation compared to PSII; however, several outstanding questions remain about the mechanisms of damage and repair, and about the impact of PSI photoinhibition on signalling and metabolism. In this review, we address the knowns and unknowns about PSI activity, inhibition, protection, and repair in plants. We also discuss the role of PSI in retrograde signalling pathways and highlight putative signals triggered by the functional status of the PSI pool.Yugo Lima-MeloMehmet KılıçEva-Mari AroPeter J. GollanFrontiers Media S.A.articlePSIphotoinhibitionP700electron transportROSmetabolismPlant cultureSB1-1110ENFrontiers in Plant Science, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	PSI photoinhibition P700 electron transport ROS metabolism Plant culture SB1-1110
spellingShingle	PSI photoinhibition P700 electron transport ROS metabolism Plant culture SB1-1110 Yugo Lima-Melo Mehmet Kılıç Eva-Mari Aro Peter J. Gollan Photosystem I Inhibition, Protection and Signalling: Knowns and Unknowns
description	Photosynthesis is the process that harnesses, converts and stores light energy in the form of chemical energy in bonds of organic compounds. Oxygenic photosynthetic organisms (i.e., plants, algae and cyanobacteria) employ an efficient apparatus to split water and transport electrons to high-energy electron acceptors. The photosynthetic system must be finely balanced between energy harvesting and energy utilisation, in order to limit generation of dangerous compounds that can damage the integrity of cells. Insight into how the photosynthetic components are protected, regulated, damaged, and repaired during changing environmental conditions is crucial for improving photosynthetic efficiency in crop species. Photosystem I (PSI) is an integral component of the photosynthetic system located at the juncture between energy-harnessing and energy consumption through metabolism. Although the main site of photoinhibition is the photosystem II (PSII), PSI is also known to be inactivated by photosynthetic energy imbalance, with slower reactivation compared to PSII; however, several outstanding questions remain about the mechanisms of damage and repair, and about the impact of PSI photoinhibition on signalling and metabolism. In this review, we address the knowns and unknowns about PSI activity, inhibition, protection, and repair in plants. We also discuss the role of PSI in retrograde signalling pathways and highlight putative signals triggered by the functional status of the PSI pool.
format	article
author	Yugo Lima-Melo Mehmet Kılıç Eva-Mari Aro Peter J. Gollan
author_facet	Yugo Lima-Melo Mehmet Kılıç Eva-Mari Aro Peter J. Gollan
author_sort	Yugo Lima-Melo
title	Photosystem I Inhibition, Protection and Signalling: Knowns and Unknowns
title_short	Photosystem I Inhibition, Protection and Signalling: Knowns and Unknowns
title_full	Photosystem I Inhibition, Protection and Signalling: Knowns and Unknowns
title_fullStr	Photosystem I Inhibition, Protection and Signalling: Knowns and Unknowns
title_full_unstemmed	Photosystem I Inhibition, Protection and Signalling: Knowns and Unknowns
title_sort	photosystem i inhibition, protection and signalling: knowns and unknowns
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/b747acf344a645189230be22c4d14333
work_keys_str_mv	AT yugolimamelo photosystemiinhibitionprotectionandsignallingknownsandunknowns AT mehmetkılıc photosystemiinhibitionprotectionandsignallingknownsandunknowns AT evamariaro photosystemiinhibitionprotectionandsignallingknownsandunknowns AT peterjgollan photosystemiinhibitionprotectionandsignallingknownsandunknowns
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Photosystem I Inhibition, Protection and Signalling: Knowns and Unknowns

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