Abstract:

In this paper, the inhibition of sea brine on Alternaria solani was measured by adopting the method of hypha growth rate and defense enzymes in tomato leaves were studied by using determination of PAL, CAT and PPO. The results showed that the inhibition of sea brine on hypha of Alternaria solani was inhibition-promotion-inhibition according to the concentration decrease of sea brine. There was a best inhibition rate (42.3%) at the concentration was 0.0050%. In addition, 0.050% sea brine could enhance the activity of PAL, CAT and PPO in tomato leaves.