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The contents of chlorophyll, soluble sugars, soluble proteins and thiobarbituric acid reaction substance (TBARS), chlorophyll fluorescence parameters, net photosynthetic rate as well as the activities of superoxide dismutase (SOD) and peroxidase (POD) of flag leaves at the late growth stages were studied by using C Liangyou series of hybrid rice combinitions as material and Shanyou 63 as control....
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