Germination Characteristics and Salt Tolerance Evaluation of Eight Peanut Varieties under NaCl Stress
In this study,eight peanut varieties with good performance and yield potential in Xinjiang in recent years were used as materials,and their salt tolerance characteristics were comprehensively evaluated by multiple germination indexes,and their salt tolerance characteristics under different NaCl concentration stress were analyzed.NaCl solutions with concentration gradients of 0,0.1％,0.3％,0.5％,0.7％and 1.0％were used to simulate salt stress conditions.The germination rate,relative germination poten-tial,germination index,salt damage rate,dry and fresh mass ratio,root-stem ratio in seedling stage were measured,and the salt tolerance of eight peanut varieties was comprehensively evaluated by combining the membership function method in fuzzy mathematics.The results showed that:① As the NaCl stress concentration increased,the germination rate and germination index of the tested peanut varieties generally showed a downward trend,and there were significant differences among varieties and treatments(P＜0.05).② The relative germination potential of peanut seeds under NaCl stress showed significant differences among varieties and treatments(P＜0.05).Under low-concentration NaCl stress,the relative germination potential of peanut seeds was less affected.For varieties such as Zhonghua16,Jinhua10,and Shanhua7,their relative germination potential showed a slight increase.However,as the NaCl concentration increased,the overall impact on their relative germination poten-tial gradually increased.③ The ratios of hypocotyls,radicles,dry and fresh mass of the eight peanut varieties generally showed an upward trend as the NaCl stress concentration increased,and there were significant differences among treatments(P＜0.05).④ The results of the dry and fresh mass ratios a-mong varieties showed that 0.3％and 0.5％NaCl stress treatments were beneficial for the accumulation of dry mass in the seedlings of these eight peanut varieties.However,different varieties had different tolerances to NaCl concentrations.Using the membership function method for comprehensive evaluation,the salt resist-ance ability of the eight peanut varieties was ranked as follows:Tianfu18＞Jinhua10＞Huayu33＞Huayu25＞Jinhua7＞Zhonghua16＞Shanhua7＞Shanhua9.
万方数据
维普
