[대학원 생명과학과 세미나 안내]
연사 : 최길주 교수 (KAIST 생명과학과)
연제 : Light signaling in plants
일시 : 2018년 11월 30일 (금) 오후 5시
장소 : 하나과학관 A동 B131호
초청교수 : 오은규 교수
Abstract
Phytochrome B (phyB) is a plant photoreceptor regulating seed germination, seedling development, vegetative growth, and leaf senescence. Red light converts biologically inactive form of phyB (Pr) to biologically active form (Pfr), whereas far-red light converts back Pfr to Pr, making phyB a light switch. Pfr also relaxes to Pr without absorbing far-red light through a process called thermal reversion. Since the speed of thermal reversion is proportional to temperature, phyB has long been suggested to be a temperature sensor. Consistently, recent studies have shown that phyB acts as a temperature sensor for hypocotyl elongation. It is not known, however, phyB of which tissue senses temperature. I will present evidence that epidermal phyB senses both light and temperature signals to regulate hypocotyl elongation and hypocotyl negative gravitropism.