תפריט נגישות
ניגודיות עדינהניגודיות גבוהה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
איפוס הגדרות נגישות
להורדת מודול נגישות חינם תפריט נגישותניגודיות עדינהניגודיות גבוההמונוכרוםהדגשת קישוריםחסימת אנימציהפונט קריאסגוראיפוס הגדרות נגישותלהורדת מודול נגישות חינםWolf, B.-C., Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel;
Tiwari, V., Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel;
Dangoor, I., Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel;
Mufkadi, S., Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel;
Danon, A., Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel
PGR5-LIKE PHOTOSYNTHETIC PHENOTYPE1 (PGRL1) regulates photosystem I cyclic electron flow which transiently activates non-photochemical quenching at the onset of light. Here, we show that a disulfide-based mechanism of PGRL1 regulated this process in vivo at the onset of low light levels. We found that PGRL1 regulation depended on active formation of key regulatory disulfides in the dark, and that PGR5 was required for this activity. The disulfide state of PGRL1 was modulated in plants by counteracting reductive and oxidative components and reached a balanced state that depended on the ight level. We propose that the redox regulation of PGRL1 fine-tunes a timely activation of photosynthesis at the onset of low light.
Wolf, B.-C., Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel;
Tiwari, V., Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel;
Dangoor, I., Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel;
Mufkadi, S., Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel;
Danon, A., Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel
PGR5-LIKE PHOTOSYNTHETIC PHENOTYPE1 (PGRL1) regulates photosystem I cyclic electron flow which transiently activates non-photochemical quenching at the onset of light. Here, we show that a disulfide-based mechanism of PGRL1 regulated this process in vivo at the onset of low light levels. We found that PGRL1 regulation depended on active formation of key regulatory disulfides in the dark, and that PGR5 was required for this activity. The disulfide state of PGRL1 was modulated in plants by counteracting reductive and oxidative components and reached a balanced state that depended on the ight level. We propose that the redox regulation of PGRL1 fine-tunes a timely activation of photosynthesis at the onset of low light.
