PDS activity acts as a rheostat of retrograde signaling during early chloroplast biogenesis.

ABSTRACT: Chloroplasts are crucial for the process of photosynthesis, as well as for developmental and environmental sensing. One of the important mechanisms of sensing is retrograde (plastid-to-nucleus) signaling, whereby the state of the chloroplast is signaled to the nucleus, resulting in alterations in gene expression for chloroplast proteins, usually at the transcriptional level. Retrograde signaling was early studied in carotenoid-deficient plants that contain, upon exposure to high light, photooxidized plastids that arise because of an inability to quench ROS produced during the light reactions of photosynthesis. Phytoene desaturase (PDS) is required for one of the early steps of the carotenogenic pathway, and impaired PDS activity during early chloroplast biogenesis results in a highly reduc

SUBMITTER: Foudree A 

PROVIDER: S-EPMC3115118 | biostudies-literature | 2010 Dec

REPOSITORIES: biostudies-literature