| Abstract: | The photosynthetic functions of rice were obviously improved by pretreatment with 150 ppm 2,3-epoxypropionate. The activity of Photosystem Ⅱ (PSⅡ) and the efficiency of primary conversion of light energy of PSⅡ detected either with intact leaves or chloroplasts were enhanced by pretreatment of 2,3-cpoxypropionate. Electron transport rate of PSⅡ, Photosystem Ⅰ (PSⅠ) and the whole chain in chloroplasts were higher than those in untreated ones. It was also confirmed that the capacity of excitation energy distribution between PSⅡ and PSI which was regulated by Mg2+ or phosphorylation of chloroplast membrane proteins in pretreated rice was larger than that in the control. From these results it can be predicted that 2,3-epoxypropionate will have some prospect for practical application to rice production. |
