The major trimeric antenna complexes serve as a site for qH-energy dissipation in plants

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  1. Note: This rebuttal was posted by the corresponding author to Review Commons. Content has not been altered except for formatting.

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    Reviewer #1 (Evidence, reproducibility and clarity (Required)):

    Summary: The Non-Photochemical Quenching (NPQ) protects photosystems from energy overloading by excess light exposure. The NPQ consists of multiple factors which function in different time scales and energy levels. One of the factors, qH, has been proposed based on chlorophyll fluorescence lifetime observation and the plastid lipocalin has been identified as the important player to regulate qH. It remains to link the qH phenotype and molecular mechanisms. The authors purify photosynthetic protein complexes from the qH mutants and tried to build a biophysical model to link qH phenomena and …

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    Referee #3

    Evidence, reproducibility and clarity

    The studies reported in this manuscript were designed to test the hypothesis that LCNP binds (or modifies) a molecule in the vicinity of (or within) the antenna proteins, under stress conditions. This in turn triggers a conformational change that converts antenna proteins from a light-harvesting to a dissipative state. Experiments were performed to locate the qH quenching site within the peripheral antenna of PSII and determine its sensitivity to Lhcb subunit composition. The authors were able to isolate antenna complexes with active qH that remained quenched after purification. Analysis of these complexes revealed that qH can occur …

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    Referee #2

    Evidence, reproducibility and clarity

    Authors observed qH in isolated LHCII trimers with Chl fluorescence changes (shorter), and concluded that no single major Lhcb isomers is necessary for qH.

    Major concern is: LHCII trimers are divided into S, M, L trimers with different compositions. Authors are requested to interpret their results in terms of L-, M-, S-trimers.

    Minor comments are: Authors describes qI as reversible NPQ, but qI with D1 damage is not reversible.

    In page 3 - 2nd paragraph, Authors define components of NPQ one by one, but the definition or revoery kinetics for qH is skipped, And authors suddenly start explaining molecular players of qH without changing …

  4. Note: This preprint has been reviewed by subject experts for Review Commons. Content has not been altered except for formatting.

    Learn more at Review Commons


    Referee #1

    Evidence, reproducibility and clarity

    Summary:

    The Non-Photochemical Quenching (NPQ) protects photosystems from energy overloading by excess light exposure. The NPQ consists of multiple factors which function in different time scales and energy levels. One of the factors, qH, has been proposed based on chlorophyll fluorescence lifetime observation and the plastid lipocalin has been identified as the important player to regulate qH. It remains to link the qH phenotype and molecular mechanisms. The authors purify photosynthetic protein complexes from the qH mutants and tried to build a biophysical model to link qH phenomena and protein science based on chlorophyll …