[Photosynthetic characteristics of grapevine varieties with different ecological adaptabilities grown in a rain-shelter plastic greenhouse in the Yangtze River Delta region].

The study with two grapevine varieties Manicure Finger and Fujiminori grown in a rain-shelter plastic greenhouse in the Yangtze River Delta region showed that in the greenhouse, the photon flux density (PFD) decreased greatly, while air temperature (Ta), vapor pressure (Vp) and transpiration rate (Tr) had little changes, no matter in sunny or cloudy days. The leaf thickness and fresh weight per cm2 of the two varieties decreased by 28.6% and 18.