Effects of Pot Cultivation on Photosynthesis and Chlorophyll Fluoresce Characteristics in Leaves of Citrus
文献类型： 会议论文
第一作者： Hongxia Xu
作者： Hongxia Xu 1 ; Huiqin Zhang 1 ; Ming Xie 1 ; Junwei Chen 1 ; Shunmin Fang 2 ;
作者机构： 1.Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
2.Speciality Station of Agricultural Bureau of Jinhua, Jinhua 321000
关键词： Citrus;Pot cultivated;Photosynthesis characteristic;Chlorophyll fluorescence
会议名称： International citrus congress
主办单位：
页码： 692-696
摘要： The effects of root restriction on the photosynthesis and chlorophyll fluorescence characteristics were studied in ' Tiancao' [ (Citrus sinensis X Citrus unshiu Marcov)×Citrus reticulate ] cultivated in pots with different sizes and in field. The results showed that the net photosynthesis rate (Pn) , stomatal conductance (G,) , intercellular CO2 concentration (C1)and transpiration rate (Tr) remained unchanged in large-pot-cultivated plants as compared to those in field at different photosynthetic photo flux density. However, Pn, G, and Tr in small-pot-cultivated plants decreased significantly, while C1 was unchanged. The capacity for CO2 utilization was reduced only at high concentration in large-pot cultivated plants, but it was significantly declined at all CO2 concentration in small-potcultivated plants in comparison with the control. Maximal efficiency of PS II photochemistry (Fv/Fm), effective PS II quantum yield (<ΦPSII), electron transport rate (ETR) and photochemical quenching (qP) as well as non-photochemical quenching (NPQ) hardly showed significant difference except that excitation energy capture efficiency of PS II reaction centers (FV'/Fm') decreased prominently in large pot-cultivated plants as compared with that in the field. However, Fv/Fm, ΦPSII, qP and ETR decreased and NPQ increased markedly in the plants cultivated in small pots. The results also showed that contents of Chl and soluble protein declined significantly in small-pot-cultivated plants, but remained stable in large-pot-cultivated plants. It indicated that small pot cultivation led to more rapid senescence in citrus leaves, which might be the reason for the declined photosynthetic capacity in small-pot-cultivated plant.
分类号： S666`S666
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