Unveiling the shade nature of cyanic leaves: A view from the "blue absorbing side" of anthocyanins.

摘要: Anthocyanins have long been suggested as having great potential in offering photoprotection to plants facing high light irradiance. Nonetheless, their effective ability protecting the photosynthetic apparatus from supernumerary photons has questioned by some authors, based upon inexact belief that anthocyanins almost exclusively absorb green photons, which are poorly absorbed chlorophylls. Here we focus on blue absorbing features of anthocyanins, a neglected issue anthocyanin research. effectively photons: absorbance relative increases tri- mono-hydroxy B-ring substituted structures, reaching up 50% absorption. We offer comprehensive picture molecular events activated low blue-light availability, extending our previous analysis purple and basil, suggest be responsible for "shade syndrome" displayed cyanic leaves. While leaves display overexpression genes promoting chlorophyll biosynthesis harvesting, it is involved stability/repair photosystems largely overexpressed. As corollary, this adds further support view an photoprotective role anthocyanins. discuss profound morpho-anatomical adjustments imposed epidermal shield, reflect harvesting capacity under shade make complex performance versus acyanic