ABSTRACT
It is apparent from the foregone account that a major problem attracting the utmost attention relates to the plant stress caused by excessive light energy absorbed. The inability of plants to match the amount of light energy absorbed with that utilized in photosynthesis results in excess excitation energy. Photosynthetic capacity is the principal determinant for the utilization of harvested light energy. Light energy unutilized during photosynthesis or otherwise not dissipated through the existing photoprotective strategies produces photoinactivation of photosystem II and photoinhibition of photosynthesis (Kato et al., 2003). Therefore, a higher photosynthetic capacity or an efficient operation of different photoprotective safety valves (Niyogi, 2000) should lower the risk of photoinhibition.
