Effects of different reflecting films,including red film(RF),blue film(BF) and aluminum film(AF),on photosynthetic characteristics and the enzyme activities related with sucrose metabolism in leaves were studied.The results showed that net photosynthesis rates(Pn) of RF and BF treatments were higher than that of CK.Compared with CK,all treatments' leaves had higher Chl b/a ratios and higher level of total Chl contents in the prophase of berries development but they were lower in the anaphase.In leaves,SS(su...