Photo-oxidative damage of photosystem I by repetitive flashes and chilling stress in cucumber leaves

Shimakawa, Ginga; Müller, Pavel; Miyake, Chikahiro; Krieger-Liszkay, Anja; Sétif, Pierre

doi:10.1016/j.bbabio.2024.149490

Biochimica et Biophysica Acta (BBA) - Bioenergetics

2024

DOI: 10.1016/j.bbabio.2024.149490

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Photo-oxidative damage of photosystem I by repetitive flashes and chilling stress in cucumber leaves

Ginga Shimakawa,

Pavel Müller,

Chikahiro Miyake

et al.

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2024

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From Quantitative Trait Loci towards Mechanisms: Linkage Integration Hypothesis Testing (LIgHT) Sheds Light on the Mechanisms of Genetically Modulated Stress Tolerance

Hoh,

Osei-Bonsu,

Kanazawa

et al. 2024

Preprint

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The goal of this work is to assess the mechanistic bases of natural genetic variations in plant responses of photosynthesis to stress. To achieve this goal, we devised the Linkage Integration Hypothesis Testing (LIgHT) approach, comparing chromosomal locations of quantitative trait loci (QTL) for multiple phenotypes to distinguish between hypothetical mechanisms. As a use case, we explored genetic variations in photosynthesis-related processes under chilling stress in recombinant inbred lines of cowpea (Vigna unguiculata L. Walp.). We focused on photosynthesis-related parameters measurable in high throughput and indicative of proposed chilling responses, including the states of photosystems I (PSI) and II (PSII), photoprotective nonphotochemical quenching, PSII photodamage, and nyctinastic leaf movements (NLM). The patterns of QTL linkages indicated chilling stress tolerance is genetically controlled by avoiding PSII photodamage rather than PSI damage or NLM. This model was validated in a separate experiment measuring the rates of PSII photodamage and repair. Additional linkages suggest that chilling-induced damage to PSII is controlled by the thylakoid proton motive force and redox state of PSII. This regulation is modulated by thylakoid fatty acid composition, as suggested in Hoh et al., 2022. We propose the LIgHT approach can be broadly applied to test mechanisms underlying genetic variations.

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From Quantitative Trait Loci towards Mechanisms: Linkage Integration Hypothesis Testing (LIgHT) Sheds Light on the Mechanisms of Genetically Modulated Stress Tolerance

Hoh,

Osei-Bonsu,

Kanazawa

et al. 2024

Preprint

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show abstract

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Photo-oxidative damage of photosystem I by repetitive flashes and chilling stress in cucumber leaves

Cited by 1 publication

References 35 publications

From Quantitative Trait Loci towards Mechanisms: Linkage Integration Hypothesis Testing (LIgHT) Sheds Light on the Mechanisms of Genetically Modulated Stress Tolerance

From Quantitative Trait Loci towards Mechanisms: Linkage Integration Hypothesis Testing (LIgHT) Sheds Light on the Mechanisms of Genetically Modulated Stress Tolerance

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