English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

PSI photoinhibition is usually avoided through P700 oxidation. Without this protective mechanism, excess light represents a potentially lethal threat to plants. PGR5 is suggested to be a major component of cyclic electron transport around PSI and is important for P700 oxidation in angiosperms. The known Arabidopsis PGR5 deficient mutant,  pgr5-1 , is incapable of P700 oxidation regulation and has been used in numerous photosynthetic studies. However, here it was revealed that  pgr5-1  was a double mutant with exaggerated PSI photoinhibition.  pgr5-1  significantly reduced growth compared to the newly isolated PGR5 deficient mutant,  pgr5 hope1  . The introduction of PGR5 into  pgr5-1  restored P700 oxidation regulation, but remained a pale-green phenotype, indicating that  pgr5-1  had additional mutations. Both  pgr5-1  and  pgr5 hope1   tended to cause PSI photoinhibition by excess light, but  pgr5-1  exhibited an enhanced reduction in PSI activity. Introducing AT2G17240, a candidate gene for the second mutation into  pgr5-1  restored the pale-green phenotype and partially restored PSI activity. Furthermore, a deficient mutant of PGRL1 complexing with PGR5 significantly reduced PSI activity in the double-deficient mutant with AT2G17240. From these results, we concluded that AT2G17240, named PSI photoprotection 1 (PTP1), played a role in PSI photoprotection, especially in PGR5/PGRL1 deficient mutants.

cells

Identification of a Novel Mutation Exacerbated the PSI Photoinhibition in pgr5/pgrl1 Mutants; Caution for Overestimation of the Phenotypes in Arabidopsis pgr5-1 Mutant