西南林业大学学报2025，Vol.45Issue(9)：46-54,9.DOI:10.11929/j.swfu.202407010
盐胁迫对5种草本植物生理生长特性的影响及耐盐性评价
Assessment of Salt Stress Effects on Physiological and Growth Traits of 5 Herbaceous Plants and Their Salt Tolerance
摘要
Abstract
Five species of herbs,including Asparagus cochinchinensis,Wedelia chinensis,Sesuvium portu-lacastrum,Ipomoea pescaprae,Gaillardia pulchella were studied.The growth and physiological characteristics of 5 tested plants were studied by means of 2 salt stress methods of roots and leaves,and their salt tolerance was comprehensively evaluated by principal component analysis and membership function analysis.The results showed that the growth of 5 plants was inhibited by salt stress to different degrees.Under root salt stress,the RWC of S.portulacastrum in 0.1％(G1)salt concentration group was significantly higher than that of CK,the RWC of W.chinensis in 0.2％(G2)and 0.3％(G3)salt concentration groups was significantly higher than that of CK except day 28.The POD activity of G.pulchella was higher than CK in all treatment groups.The CAT activ-ity of W.chinensis,S.portulacastrum and G.pulchella was higher than CK.Under leaf salt stress,the RWC of S.portulacastrum in 0.2％(Y1)salt treatment group was higher than CK,POD activities of W.chinensi and I.pes-capra were higher than CK,and the RWC of G.pulchella in 0.3％(Y2)salt treatment group was significantly high-er than CK at the 14th and 28th days,POD activities of W.chinensis were higher than CK.The CAT activities of W.chinensis,S.portulacastrum and I.pescapra were higher than those of CK in all treatment groups.Under the 2 salt stress modes,SPAD value of 5 tested plants in each treatment group was significantly lower than CK after 14 days of salt treatment,and MDA content was higher than CK during the whole salt stress stage.The salt tolerance of 5 tested plants was evaluated comprehensively.The salt tolerance of the 5 tested plants under root salt stress was ranked as S.portulacastru＞A.cochinchinensis=G.pulchella＞W.chinensis＞I.pescaprae.The order of salt tolerance of 5 plants under salt stress was W.chinensi＞SS.portulacastrum＞A.cochinchinensis＞G.pulchella＞I.pescapra.The comprehensive analysis showed that SS.portulacastru,A.cochinchinensis and W.chinensi showed stronger salt tolerance after root salt stress,while only S.portulacastru and W.chinensi showed stronger salt tolerance after leaf salt stress,and S.portulacastrum showed stronger salt tolerance after root and leaf salt stress.关键词
草本植物/生长生理/盐胁迫/耐盐性/评价Key words
herb/growth physiology/salt stress/salt tolerance/evaluation分类
农业科技引用本文复制引用
王晓玲,杨洁,王思凡,林文波,郭萍萍,刘芳,袁宗胜..盐胁迫对5种草本植物生理生长特性的影响及耐盐性评价[J].西南林业大学学报,2025,45(9):46-54,9.基金项目
福州海洋研究院科技项目(2022F06)资助 （2022F06）
福建省林业科技项目(2023FKJ12)资助. （2023FKJ12）
