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UID:1218@biology.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20240403T130000

DTEND;TZID=Asia/Jerusalem:20240403T140000

DTSTAMP:20240321T102102Z

URL:https://biology.technion.ac.il/en/seminars/phd-graduate-seminar-guy-le
 vin/

SUMMARY:PhD Graduate Seminar- Guy Levin [No Categories]
DESCRIPTION:Location: Hybrid- in the Faculty Auditorium/ZOOM: https://techn
 ion.zoom.us/j/97557530438   Guy Levin\n Affiliation: \n Host:Professor Eme
 ritus Schuster Gadi\, Associate Prof. Yehezkeli Omer\n The unique mechanis
 ms that enable Chlorella ohadii to thrive in light intensities that are fa
 tal to most photosynthetic organisms\nAlthough light is required for photo
 synthesis\, too much light is harmful and may cause damage to the photosyn
 thetic proteins in a process known as photoinhibition. During photoinhibit
 ion\, photosynthesis is inhibited in plants\, algae\, and cyanobacteria\, 
 and may lead to retarded growth and death. Improving photoinhibition resis
 tance to increase crop production is a long-standing goal for plant scient
 ists worldwide. Here we reveal the unique mechanisms of photoinhibition re
 sistance in the desert green algae Chlorella ohadii\, one of the most high
 -light tolerant organisms on the planet. We show that C. ohadii lacks some
  of the most important photoinhibition resistance mechanisms in other mode
 l organisms\, such as non-photochemical quenching (NPQ)\, the PsbS and Lhc
 SR proteins\, and state transitions. Instead\, C. ohadii protects photosyn
 thesis by eliminating the photosynthetic antenna and minimizing excess ene
 rgy uptake\, while maximizing cyclic electron flow around photosystem I an
 d antioxidant activity via carotenoids and enzymatic detoxification\, thus
  protecting the photosynthetic proteins. Our work describes a new efficien
 t mechanism for photoinhibition resistance under extreme light intensities
  and provides potential targets for improving photoinhibition resistance i
 n crop plants.\n 
LOCATION:Hybrid- in the Faculty Auditorium/ZOOM: https://technion.zoom.us/j
 /97557530438

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