Non-Photochemical Quenching: From Light Perception to Photoprotective Gene Expression.
Int J Mol Sci
; 23(2)2022 Jan 08.
Article
em En
| MEDLINE
| ID: mdl-35054872
ABSTRACT
Light is essential for photosynthesis but light levels that exceed an organism's assimilation capacity can cause serious damage or even cell death. Plants and microalgae have developed photoprotective mechanisms collectively referred to as non-photochemical quenching to minimize such potential damage. One such mechanism is energy-dependent quenching (qE), which dissipates excess light energy as heat. Over the last 30 years, much has been learned about the molecular mechanism of qE in green algae and plants. However, the steps between light perception and qE represented a gap in our knowledge until the recent identification of light-signaling pathways that function in these processes in the green alga Chlamydomonas reinhardtii. In this review, we summarize the high light and UV-mediated signaling pathways for qE in Chlamydomonas. We discuss key questions remaining about the pathway from light perception to photoprotective gene expression in Chlamydomonas. We detail possible differences between green algae and plants in light-signaling mechanisms for qE and emphasize the importance of research on light-signaling mechanisms for qE in plants.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Chlamydomonas reinhardtii
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Regulação da Expressão Gênica de Plantas
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Transdução de Sinal Luminoso
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Processos Fotoquímicos
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article