A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Interaction between photosynthetic electron transport and chloroplast sinks triggers protection and signalling important for plant productivity
Tekijät: Gollan PJ, Lima-Melo Y, Tiwari A, Tikkanen M, Aro EM
Kustantaja: ROYAL SOC
Julkaisuvuosi: 2017
Journal: Philosophical Transactions B: Biological Sciences
Tietokannassa oleva lehden nimi: PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
Lehden akronyymi: PHILOS T R SOC B
Artikkelin numero: ARTN 20160390
Vuosikerta: 372
Numero: 1730
Sivujen määrä: 13
ISSN: 0962-8436
eISSN: 1471-2970
DOI: https://doi.org/10.1098/rstb.2016.0390
Tiivistelmä
The photosynthetic light reactions provide energy that is consumed and stored in electron sinks, the products of photosynthesis. Abalance between light reactions and electron consumption in the chloroplast is vital for plants, and is protected by several photosynthetic regulation mechanisms. Photosystem I (PSI) is particularly susceptible to photoinhibition when these factors become unbalanced, which can occur in low temperatures or in high light. In this study we used the pgr5 Arabidopsis mutant that lacks DpH-dependent regulation of photosynthetic electron transport as a model to study the consequences of PSI photoinhibition under high light. We found that PSI damage severely inhibits carbon fixation and starch accumulation, and attenuates enzymatic oxylipin synthesis and chloroplast regulation of nuclear gene expression after high light stress. This work shows that modifications to regulation of photosynthetic light reactions, which may be designed to improve yield in crop plants, can negatively impact metabolism and signalling, and thereby threaten plant growth and stress tolerance.This article is part of the themed issue 'Enhancing photosynthesis in crop plants: targets for improvement'.
The photosynthetic light reactions provide energy that is consumed and stored in electron sinks, the products of photosynthesis. Abalance between light reactions and electron consumption in the chloroplast is vital for plants, and is protected by several photosynthetic regulation mechanisms. Photosystem I (PSI) is particularly susceptible to photoinhibition when these factors become unbalanced, which can occur in low temperatures or in high light. In this study we used the pgr5 Arabidopsis mutant that lacks DpH-dependent regulation of photosynthetic electron transport as a model to study the consequences of PSI photoinhibition under high light. We found that PSI damage severely inhibits carbon fixation and starch accumulation, and attenuates enzymatic oxylipin synthesis and chloroplast regulation of nuclear gene expression after high light stress. This work shows that modifications to regulation of photosynthetic light reactions, which may be designed to improve yield in crop plants, can negatively impact metabolism and signalling, and thereby threaten plant growth and stress tolerance.This article is part of the themed issue 'Enhancing photosynthesis in crop plants: targets for improvement'.
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