Effects of seeds carried by satellite on photosynthetic characteristics of Trifolium repens

The Chlorophyll，photosynthetic characteristics,ultramicroscopic structure of Trifolium repens leaf were measured and observed when T.repens seeds were carried by satellite. The results of this study showed that the Chlorophyll a and total chlorophyll, photosynthetic rate (Pn), conductance to H2O (Cond) and transpiration rate (Tr) of leaves during 13:00-15:00 (P0.05) when T.repens seeds were carried by satellite were lower than that of leaves when seeds were not carried by satellite (P0.05). Compared with the plant leaves growing from seeds without satellite treatment, plant leaves with satellite treatment showed the more tortuously chloroplast, more starch grains with different size, in which some leaves were even filled by disorderly chloroplast.The osmiophilic globule were unevenly distributed in the disorderly chloroplasts and mitochondria cracked.From the ultrastructure pictures, grana lamellae of chloroplsts were reduced and their diameter became larger.