Effects of Rain Shelter Cultivation on Apparent Characteristics and Photo-synthetic Physiology of Mango Leaves
The present experiment was conducted to investigate the effects of rain shelter cultivation on apparent characteristics and photosynthetic physiology of mango leaves.In this study,'Nan Doc Mai No.4 mango'was used as material to compare the apparent characteristics such as leaf length,width,thickness,curl and chlorophyll fluores-cence under rain shelter cultivation and open field cultivation.At the same time,correlation analysis and principal component analysis were used to analyze the apparent characteristics and chlorophyll fluorescence of mango leaves.The results indicated that under rain shelter cultivation,mango leaves become longer,wider,thinner,with increased leaf area and reduced curl.The chlorophyll fluorescence parameters of Fo,Fm,and F(Fs)increased,and there was significant difference in Fo(P＜0.05).The chlorophyll fluorescence parameters of Fv/Fm,Fv'/Fm',NPQ,ETR,and Fq'/Fm'decreased,and there was significant difference in ETR and Fq'/Fm'(P＜0.05).The length and width of leaves are positively correlated with Fo.Chlorophyll fluorescence parameters such as ETR,Fq'/Fm',and leaf length and width are the main photosynthetic physiological indicators affected by cultivation conditions.In conclu-sion,the photosynthetic rate and efficiency of'Nan Doc Mai No.4 mango'in rain shelter have decreased compared to those in the open field.Mango can grow normally without environmental stress in rain shelter.Thus the rain shelter cultivation model can be promoted in mango planting areas in southern pluvial regions of China.
Nan Doc Mai No.4 mangoRain shelter cultivationChlorophyll fluorescence
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