莲藕资源耐盐性评价

Evaluation of Lotus Root Resources about Salt Tolerance

Abstract: For the study of the salt tolerance of different lotus root resources (E1, E2, E3, E4, H2, H5 and H8) dealt with 0.6%NaCl, a range of indicators which contained salt injury index, chlorophyll content, plasma membrane relative permeability, root activity and content of MDA, SOD and POD were determinate and the salt tolerance ability was evaluated comprehensively. The results showed that the salt injury index of H5 was the lowest. The chlorophyll content of E1 was the lowest and E2, E4, H5 and H8 were higher, whose salt tolerance were relatively strong. The plasma membrane relative permeability of H2 and E3 were not signifi cantly different but signifi cantly higher than other lotus root resources. The root activity of H5 was the highest, followed by H8, and root activity of E3 was the lowest. MDA content of E4 was the highest and was signifi cantly higher than that of other lotus root resources and MDA content of H5 was the lowest. POD and SOD content of lotus root resources were signifi cantly different. The POD content of E3 and E1 was lower while the POD content of H5 was the highest, followed by H8 with no signifi cant difference. The SOD content of H5, E2, E1 and H2 was higher than that of other lotus root resources and that of H5 and E4 was the highest and the lowest separately. The salt tolerances of seven lotus roots were signifi cantly different, and the descending order of that was H5, H8, E2, E4(E1), E3 and H2. The salt tolerances of H5 and H8 were relatively strong, those of E1, E2 and E4 were relatively moderate, and those of E3 and H2 were relatively weak.