Effect of the biosynthesis of the volatile compound phenylacetaldehyde on chloroplast modifications in tea (<i>Camellia sinensis</i>) plants

Abstract Plant volatile compounds have important physiological and ecological functions. Phenylacetaldehyde (PAld), a phenylpropanoid/benzenoid, accumulates in the leaves of tea (Camellia sinensis) plants grown under continuous shading. This study was conducted to determine whether PAld production is correlated with light elucidate functions plants. Specifically, upstream mechanism modulating biosynthesis different conditions as well effects on chloroplast/chlorophyll were investigated. The inhibited light, whereas it induced darkness. structural gene encoding aromatic amino acid aminotransferase 1 (CsAAAT1) expressed at high level darkness, consistent its importance for accumulation. Additionally, results transcriptional activation assay an electrophoretic mobility shift indicated CsAAAT1 expression slightly activated by phytochrome-interacting factor 3-2 (CsPIF3-2), which light-responsive transcription factor. Furthermore, might promote excitation chlorophyll dark-treated chloroplasts mediate electron energy transfer cells. However, accumulated can degrade chlorophyll, potentially detrimental photosynthesis. Moreover, red blue thereby decreasing adverse during daytime. In conclusion, regulated darkness leads chloroplast modifications. this expanded our understanding phenylpropanoids/benzenoids leaves.