Mesophyll-specific phytochromes impact chlorophyll light-harvesting complexes (LHCs) and non-photochemical quenching.

ABSTRACT: Phytochromes regulate light-dependent plastid development and plant growth and development. Prior analyses demonstrated that phytochromes regulate expression of Sigma factor 2 (SIG2), which is involved in plastid transcription and coordinates expression of plastid- and nuclear-encoded genes involved in plastid development, as well as plant growth and development. Mutation of SIG2 impacts distinct aspects of photosynthesis, resulting in elevated levels of cyclic electron flow and nonphotochemical quenching (NPQ). As we initially identified SIG2 expression as misregulated in a line lacking phytochromes in mesophyll tissues (i.e., CAB3::pBVR lines), here we report on an investigation of whether photosynthetic parameters such as NPQ are also disrupted in CAB3::pBVR lines. We dete

SUBMITTER: Oh S 

PROVIDER: S-EPMC6619949 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature