Enhancement of waterlogging tolerance of cucumber seedlings by nitric oxide
In order to enhance the waterlogging tolerance of cucumber seedlings,100 μmol· L-1 sodium nitroprusside (SNP) was used as a donor of exogenous nitric oxide (NO),the effects of exogenous NO on the plasma membrane,photosynthetic characteristics and antioxidant enzyme activities of cucumber seedlings under waterlogging stress were explored.The results indicated that exogenous NO could inhibited the increase of relative plasmalemma permeability and malondialdehyde of cucumber seedlings under waterlogging stress.The relative plasma membrane permeability and MDA content of the cucumber root treated by SNP were extremely significant different from that of control under waterlogging stress for 8 days.Exogenous NO could retard the decomposing of chlorophyll,maintain the photosynthetic capacity of cucumber seedlings under waterlogging.The chlorophyll content and photosynthetic rate of cucumber leaves treated by SNP were extremely higher than that of control group under waterlogging stress for 8 days.Exogenous NO could increase the activities of SOD,POD,CAT.The activities of SOD and POD of the cucumber root treated by SNP were highly significant and that of CAT were significant different from that of control group under waterlogging stress for 8 days.This experiment showed that exogenous NO could impove the capacity of anti-waterlogging stress of cucumber seedlings.
NETL
NSTL
万方数据
维普
