Non-photochemical quenching

Non-photochemical quenching is a protective mechanism that plants employ to dissipate excess light energy. Plants often absorb more light energy than they can process in photosynthesis, and the quenching of singlet excited chlorophylls - non-photochemical quenching - leads to the harmless dissipation of this excess energy as heat.

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    Ascorbate is synthesized in mitochondria but needed in chloroplasts. Identification of a transporter bridging the chloroplast envelope membranes that separate cell cytoplasm from chloroplast stroma reveals a connection between ascorbate transport and cellular redox homeostasis.

    • Christine H. Foyer
    Nature Plants 1, 14012