The effects ofsodium nitroppm sside (SNP) as an exogenous nitric oxide donor atthe -4 ℃ low tem perature stress conditions on the dynam ic changes ofconductivity and relative decline in the amount of contentin tea leaves under low tem perature stress were studied.The results showed thatexogenous NO can reduce the relative conductivity of tea leaves under lowtem perature stress, and to deal with the effect of SNP concentration in 0.2m mol/L for the best, but there are differences in the effects of different varieties and tim es , 0.2m mol/L SNP...