Physiological Responses of Eight Pyrus Calleryana Decne.Clones to Salt Stress
WANG Lili
WEI Haixia
YANG Qingshan
WANG Zhenmeng
LI Yongtao
ZHOU Jian
Abstract：Pot experiment was conducted with P.calleryana seedlings as test materials,and NaCl solution with concentration of 0(CK),4,8,12,16 ‰ was irrigated to observe the changes of physiological indexes;Then,eight P.calleryana of lines(species)were used as test materials,and NaCl solution with concentration of 0(CK)and 8 ‰ was irrigated to measure their physiological indexes and evaluate the salt tolerance of each line(species).The results showed that with the increase of NaCl stress,MDA and H2O2 of P.calleryana increased significantly.With the start of the protective enzyme system,the content of H2O2 produced in metabolism decreased gradually,avoiding membrane lipid peroxidation,which was conducive to the normal growth of P.calleryana under low concentration salt stress;With the increase of salt concentration,the protective enzymes SOD,POD,CAT all increased first and then decreased,and APX decreased first and then increased;It was found that the change rule of each index of each line number was not obvious compared with that of the control group,and there was a significant difference between each line number when each line number was treated with 8 ‰ NaCl solution;The subordination function method of fuzzy mathematics was used to comprehensively rank the salt tolerance of eight P.calleryana lines(species).It was found that the stronger salt tolerance were m11,m24 and sd,the middle salt tolerance was j2 and j8,and the weaker salt tolerance was m21,m10 and m12.
Keywords：Pyrus calleryana Decne.salt resistancephysiological characteristicsevaluate
Publication Date：2023-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 60-65 )