Effects of rare earth element lanthanum on drought tolerance of Robinia pseudoacacia L. seedlings
The effects of lanthanum on drought tolerance of Robinia pseudoacacia L. were investigated, in order to provide evidence for its application in the water management of Robinia pseudoacacia L seedlings. By the artificial control method, the effects of lanthanum chloride on the leaf relative water content, photosynthetic rate and biomass, the activities of SOD, POD and CAT, the membrane permeability and MDA content in leaves under drough were studied by pot experiment. The results show that the drought stress significantly decreased leaf relative water content, photosynthetic rate and biomass, and significantly increased the activities of SOD and POD, the membrane permeability and MDA content in leaves, however, the drought stress had no obvious effect on the activity of CAT;Compared with drought stress alone, 10μmol and 20μmol lanthanum chloride significantly increased leaf relative water content, photosynthetic rate, biomass and the activities of SOD, POD and CAT, and significantly decreased the membrane permeability and MDA content in leaves, 40μmol lanthanum chloride had no significant effects on above indicators, however, 80μmol lanthanum chloride significantly decreased leaf relative water content, photosynthetic rate, biomass and the activities of SOD, POD and CAT, and significantly increased the membrane permeability and MDA content in leaves;Low concentrations of lanthanum could alleviate the injury of R. pseudoacacia seedlings caused by drought stress. The findings provide evidence for the application of lanthanum in the water management of R. pseudoacacia seedlings.
NETL
NSTL
万方数据
维普
