UV-B antagonises shade avoidance and increases levels of the flavonoid quercetin in coriander (Coriandrum sativum).

ABSTRACT: Despite controlling a diverse array of regulatory processes in plants, UV-B wavelengths (280-315 nm) are attenuated by common greenhouse materials such as glass and polycarbonate and are therefore depleted in many commercial growing environments. In this study, we analysed the architecture, pigment accumulation and antioxidant capacity of coriander (Coriandrum sativum, also known as cilantro) plants grown with and without supplementary UV-B (1.5 µmol m-2 s-1). We demonstrate that UV-B limits stem elongation responses to neighbour proximity perception (shade avoidance), promoting a more compact plant architecture. In addition, UV-B increased leaf quercetin content and total antioxidant capacity. Arabidopsis thaliana mutants deficient in flavonoid biosynthesis were not impaired in shade avoi

SUBMITTER: Fraser DP 

PROVIDER: S-EPMC5736551 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature