Phytochrome A and B Regulate Primary Metabolism in Arabidopsis Leaves in Response to Light.

ABSTRACT: Primary metabolism is closely linked to plant productivity and quality. Thus, a better understanding of the regulation of primary metabolism by photoreceptors has profound implications for agricultural practices and management. This study aims at identifying the role of light signaling in the regulation of primary metabolism, with an emphasis on starch. We first screened seven cryptochromes and phytochromes mutants for starch phenotype. The phyAB mutant showed impairment in starch accumulation while its biomass, chlorophyll fluorescence parameters, and leaf anatomy were unaffected, this deficiency being present over the whole vegetative growth period. Mutation of plastidial nucleoside diphosphate kinase-2 (NDPK2), acting downstream of phytochromes, also caused a deficit in starch ac

SUBMITTER: Han X 

PROVIDER: S-EPMC5552712 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature