Two low potassium(K) tolerance rice(Oryza sotiva L.)genotype,N18 and N19,and their recipient,N27(control) were used to investigate the effects of low K stress on the photosynthetic characteristics of different rice genotypes at seedling stage.The results showed that under low K stress condition,although the contents of chlorophyll a,chlorophyll b and chlorophyll(a+b) in leaves of all genotypes decreased,the contents of them were higher in N18 and N19 than that in N27.Also although the net photosynthetic rate,respiration rate,stomatic conductance,intercellular CO2 concentration and transpiratio...
