Abstract
Chlorophyll metabolism has two roles. The first role is to supply chlorophyll molecules to photosystems during greening and to sweep away the disused chlorophyll that enables the efficient recovery of nitrogen of chlorophyll-binding proteins during senescence. The second role is to produce the intermediate metabolites of chlorophyll synthesis and degradation. Chlorophyll metabolism is considered to be strictly regulated to reduce the accumulation of intermediate molecules, because these molecules are powerful photosensitizers. However, they could be accumulated in stressed conditions or senescence. When these molecules are accumulated, they induce the oxidative stress response under illumination and affect the plant growth and development. In this symposium, we will discuss the functions of chlorophyll metabolism in relation to the plant growth and development.
