Interaction between photosynthetic electron transport and chloroplast sinks triggers protection and signalling important for plant productivity.

ABSTRACT: The photosynthetic light reactions provide energy that is consumed and stored in electron sinks, the products of photosynthesis. A balance between light reactions and electron consumption in the chloroplast is vital for plants, and is protected by several photosynthetic regulation mechanisms. Photosystem I (PSI) is particularly susceptible to photoinhibition when these factors become unbalanced, which can occur in low temperatures or in high light. In this study we used the pgr5 Arabidopsis mutant that lacks ΔpH-dependent regulation of photosynthetic electron transport as a model to study the consequences of PSI photoinhibition under high light. We found that PSI damage severely inhibits carbon fixation and starch accumulation, and attenuates enzymatic oxylipin synthesis and chlorop

SUBMITTER: Gollan PJ 

PROVIDER: S-EPMC5566885 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature