Studies on Photosynthetic Characteristics of Gamellia sasangua inside Greenhouse

Abstract

Abstract: 【Objective】Studies on photosynthetic characteristics of Gamellia sasangua Thunb in greenhouse, which provides theory basis for cultivation of grape in greenhouse; 【Method】Photosynthetic characteristics and physio-ecological features of G. sasangua in greenhouse were examined using CI-301 CO2 GAS ANALYZER, and the principal factors to Pn were tried to find out through path analysis.【Results】(1)the curve of diurnal variation of G sasangua leaf photosynthesis showed two peaks, and had obvious ‘noon break’. The light saturation point and light compensation point of photosynthesis were 221μmol·/m2·s and 13.9μmol·/m2·s , respectively . When the leaf temperature was 27.5oC, the photosynthetic rate reached the highest point.(2)Pn was significantly correlated with Gs, CI, Tr, Ca, PAR, Tl, among which, Gs could be regarded as the principal physiological factor, and PAR the principal ecological factors.(3)Ci and Tr had a obvious positive relationship with Ca and PAR,respectively.【Conclusion】The curve of diurnal variation of G. sasangua leaf photosynthesis showed two peaks,and had obvious ‘noon break’.Gs could be regarded as the principal physiological factor, and PAR the principal ecological factors.

CLC Number:

S688

Yang Xiaopen,Yang Weihong,Guo Jinping. Studies on Photosynthetic Characteristics of Gamellia sasangua inside Greenhouse[J]. Chinese Agricultural Science Bulletin, 2007, 23(5): 139-139.

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