Chilling- and dark-regulated photoprotection in Miscanthus, an economically important C₄ grass.

ABSTRACT: Tolerance of chilling dictates the geographical distribution, establishment, and productivity of C₄ crops. Chilling reduces enzyme rate, limiting the sink for the absorbed light energy leading to the need for quick energy dissipation via non-photochemical quenching (NPQ). Here, we characterize NPQ upon chilling in three Miscanthus accessions representing diverse chilling tolerance in C₄ grasses. High chilling tolerant accessions accumulate substantial amounts of zeaxanthin during chilling nights in both field and growth chamber settings. Chilling-induced zeaxanthin accumulation in the dark enhances rate of NPQ induction by 66% in the following morning. Based on our data, the emerging ways for the unique regulation of NPQ include post-translational regulation of violax

SUBMITTER: Haupt J 

PROVIDER: S-EPMC11659412 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature