The melatonin receptor CAND2 is involved in the regulation  of photosynthesis and chloroplast gene expression in Arabidopsis thaliana under photooxidative stress

Bychkov, Ivan A.; Kudryakova, N. V.; Pojidaeva, E. S.; Kusnetsov, V. V.

doi:10.32615/ps.2021.061

Cited by 14 publications

(4 citation statements)

References 32 publications

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“…It has been shown that melatonin can protect photosystem and enhance photosynthetic capacity in vascular plants exposed to different environmental stresses ( Yin et al, 2013 ). Recent studies showed that melatonin improved photosynthetic efficiency probably through regulating the CAND2/PMTR1-mediated signaling pathway ( Bychkov et al, 2021 ; Yang et al, 2022 ), reducing chlorophyll degradation, and alleviating the damage to the integrity of thylakoid membrane via increasing the expression levels of electron-transport-related proteins under NO 2 stress ( Wang et al, 2022 ). In this study, exogenous melatonin application at 25 μM effectively improved the photosynthetic capacity of PSII under osmotic stress.…”

Section: Discussionmentioning

confidence: 99%

Exogenous melatonin improved photosynthetic efficiency of photosystem II by reversible phosphorylation of thylakoid proteins in wheat under osmotic stress

et al. 2022

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It has been well demonstrated that melatonin plays an important protective role in photosynthesis of plants under various environmental stresses, while the detailed mechanisms by which melatonin protects photosystem II (PSII) under environmental stress are still unclear. In the study, the effects of melatonin on photosynthetic efficiency, energy dissipation, PSII protein composition, and reversible phosphorylation of thylakoid proteins were investigated in wheat plants under osmotic stress. The results showed that osmotic stress significantly reduced pigment content, photochemical efficiency of PSII, oxygen-evolving activity, and dissipation of excess excitation energy, while 25 μM melatonin applications greatly alleviated their decline under osmotic stress. Western blot data of PSII proteins revealed that melatonin upregulated the levels of D1, Lhcb5, Lhcb6, PsbQ, and PsbS proteins in wheat exposed to osmotic stress. In addition, thylakoid membrane proteins were strongly phosphorylated in wheat under osmotic stress with or without melatonin. Furthermore, the results from PSII protein dephosphorylation showed that exogenous melatonin promoted the dephosphorylation of LCHII, CP43, and D1 under osmotic stress. Therefore, our findings suggest that melatonin can provide an effective protection for the photosynthetic apparatus by the regulation of PSII proteins and the reversible phosphorylation of thylakoid proteins under drought stress.

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Section: Discussionmentioning

confidence: 99%

Exogenous melatonin improved photosynthetic efficiency of photosystem II by reversible phosphorylation of thylakoid proteins in wheat under osmotic stress

et al. 2022

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“…CAND2 could regulate photooxidative stress by inducing the expression of chloroplast (ELIP1) and nuclear gene (LHCB2). 271 GmWRKY16 overexpressing significantly increased plant drought resistance by mediating the expression of stressrelated genes such as RD29A, RD22, KIN1, and LEA14. 272 Consistent with this, GmNAC11 and CarNAC4 from soybean and chickpea regulated DREB1A, ERD11/10, COR15A/47, RD29A, ERF5, RAB18, KIN1 and KAT2 to build drought and salt tolerance.…”

Section: Abiotic Stressmentioning

confidence: 95%

“…The high expression of resistance‐associated genes is an important mechanism for melatonin to improve abiotic stress tolerance (Figure 7A). CAND2 could regulate photooxidative stress by inducing the expression of chloroplast ( ELIP1 ) and nuclear gene ( LHCB2 ) 271 . GmWRKY16 overexpressing significantly increased plant drought resistance by mediating the expression of stress‐related genes such as RD29A , RD22 , KIN1 , and LEA14 272 .…”

Section: Melatonin Signal Transductionmentioning

confidence: 99%

Genetic and evolutionary dissection of melatonin response signaling facilitates the regulation of plant growth and stress responses

Gao

Chen

et al. 2023

Journal of Pineal Research

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The expansion of gene families during evolution could generate functional diversity among their members to regulate plant growth and development. Melatonin, a phylogenetically ancient molecule, is vital for many aspects of a plant's life. Understanding the functional diversity of the molecular players involved in melatonin biosynthesis, signaling, and metabolism will facilitate the regulation of plant phenotypes. However, the molecular mechanism of melatonin response signaling elements in regulating this network still has many challenges. Here, we provide an in‐depth analysis of the functional diversity and evolution of molecular components in melatonin signaling pathway. Genetic analysis of multiple mutants in plant species will shed light on the role of gene families in melatonin regulatory pathways. Phylogenetic analysis of these genes was performed, which will facilitate the identification of melatonin‐related genes for future study. Based on the abovementioned signal networks, the mechanism of these genes was summarized to provide reference for studying the regulatory mechanism of melatonin in plant phenotypes. We hope that this work will facilitate melatonin research in higher plants and finely tuned spatio‐temporal regulation of melatonin signaling.

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“…In that case, the melatonin-dependent alleviation of plant growth restriction, the total amount of ROS following osmotic stress, and the expression level of several ROS processing enzymes following the stress were all AtPMTR1-dependent. Similarly, some evidence for an AtPMTR1 dependency for the melatonin alleviation of high-light stress in Arabidopsis also exists ( Bychkov et al, 2021 ). Moreover, the involvement of PMTR1 in the melatonin-induced response is not restricted to Arabidopsis .…”

Section: Melatoninmentioning

confidence: 99%

Why did glutamate, GABA, and melatonin become intercellular signalling molecules in plants?

Caspi

Pantazopoulou

Prompers

et al. 2023

eLife

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Intercellular signalling is an indispensable part of multicellular life. Understanding the commonalities and differences in how signalling molecules function in two remote branches of the tree of life may shed light on the reasons these molecules were originally recruited for intercellular signalling. Here we review the plant function of three highly studied animal intercellular signalling molecules, namely glutamate, γ-aminobutyric acid (GABA), and melatonin. By considering both their signalling function in plants and their broader physiological function, we suggest that molecules with an original function as key metabolites or active participants in reactive ion species scavenging have a high chance of becoming intercellular signalling molecules. Naturally, the evolution of machinery to transduce a message across the plasma membrane is necessary. This fact is demonstrated by three other well-studied animal intercellular signalling molecules, namely serotonin, dopamine, and acetylcholine, for which there is currently no evidence that they act as intercellular signalling molecules in plants.

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The melatonin receptor CAND2 is involved in the regulation of photosynthesis and chloroplast gene expression in Arabidopsis thaliana under photooxidative stress

Cited by 14 publications

References 32 publications

Exogenous melatonin improved photosynthetic efficiency of photosystem II by reversible phosphorylation of thylakoid proteins in wheat under osmotic stress

Exogenous melatonin improved photosynthetic efficiency of photosystem II by reversible phosphorylation of thylakoid proteins in wheat under osmotic stress

Genetic and evolutionary dissection of melatonin response signaling facilitates the regulation of plant growth and stress responses

Why did glutamate, GABA, and melatonin become intercellular signalling molecules in plants?

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