Dynamic response of O_2-dependent alternative electron flow to the growth irradiance in pea leaves

摘要

Plants require light and CO_2 for photosynthesis controlling their growth. However, one of the two substrates light can be the threatening factor damaging the photosynthesis and suppresses their growth. For example, on exposed to the environmental stress, drought, chilling or salinity stress, plants suffer from remarkable inhibition of growth. Under these conditions where the fixation of CO_2 by photosynthesis is suppressed, the excess photonenergy against its usage by photosynthesis causes photoinhibition at PSII of thylakoids in chloroplasts and gives destructive damages to the photosynthesis (Asada 1999).