盐胁迫对6种刺槐幼苗生长及耐盐能力的影响

Effects of Salinity Stress on Growth and Salt-tolerance ability of six Black Locust Seedlings

[目的]探讨盐胁迫对刺槐幼苗生长、叶绿素含量和质膜透性的影响。[方法]以匈牙利四倍体、韩国四倍体、3-I、3-K、8044、80332为试材,利用盐碱土浸提液法进行盐胁迫处理,28d后分别测定新梢生长量、干径生长量、盐害指数、叶绿素含量、质膜透性。[结果]盐胁迫处理显著降低了刺槐幼苗的新梢生长量、干径生长量、叶绿素含量,提高了叶片盐害指数、质膜透性。[结论]6个品种在不同盐胁迫处理下的耐盐能力有显著差异,表现为8044>80332>3-K>3-I>匈牙利四倍体>韩国四倍体。

[ Objective] The effects of salinity stress on Black Locust seedlings growth, chlorophyll content and membrane permeability were studied. [ Method] Take Hungary tetraploid, Korea tetraploid,3 -1,3 -K,8044 and 80332 for test materials, with saline-alkali soil leaching extract method for salinity stress treatment, shoot length, stem diameter growth, salt injury index, chlorophyll content and membrane permeability were determined respectively after 28 days. [ ResultSalinity] stress treatment decreased significantly shoot length, stem diameter growth and chlorophyll content, leaf salt injury index and membrane permeability were increased. [ Conclusion] Salt resistance ability of six varieties in diffm^nt salinity stress treatment showed significant difference, manifested as 8044 〉 80332 〉 3 - K 〉 3 - I 〉 Hungary tetraploid 〉 Ko- rea tetraploid.