盐碱胁迫对三个品种桑树种子萌发的影响  

Effects of Saline Alkali Stress on Seed Germination of Three Mulberry Varieties

作　　者：赵东晓[1] 董亚茹[1] 杜建勋[1] 陈传杰[1] 王照红[1] 孙景诗[1] 梁明芝[1] 

机构地区：[1]山东省蚕业研究所,山东烟台264002

出　　处：《山东农业科学》2017年第7期49-55,共7页Shandong Agricultural Sciences

基　　金：山东省农业科学院农业科技创新工程项目(CXGC2016A03;CXGC2016B10);山东省农业科学院科技创新重点项目(2014CXZ04-2);国家蚕桑产业技术体系烟台综合试验站(CARS-22-SY212)

摘　　要：盐碱胁迫是植物遭受的主要非生物胁迫之一。本研究将两种中性盐(NaCl和Na_2SO_4)、两种碱性盐(NaHCO_3和Na_2CO_3)按1∶1混合,分别设置5个不同盐碱浓度,对3个品种桑树种子进行处理,测定发芽率、发芽势、相对发芽率、相对发芽势、发芽指数、相对盐害率和子叶生长率等参数。结果表明:碱性盐胁迫对桑树种子萌发和子叶生长的抑制作用比中性盐胁迫更强。低浓度的中性盐溶液(﹤50 mmol/L)可促进桂优12号种子萌发,当盐溶液浓度高于50 mmol/L时则变为抑制。综合各项指标分析表明,中性盐胁迫下桂优12号抗性最强,桂优62号次之,8036×农14最差;碱性盐胁迫下桂优62号抗性最强,桂优12号次之,8036×农14最差。Saline alkali stress is one of the major abiotic stress in plants. In this study,two kinds of neutral salts（ NaCl and Na2SO4） and two kinds of alkaline salts（ NaHCO3 and Na2CO3） were mixed at 1∶ 1,and five different saline concentrations were set to dispose of three varieties of mulberry seeds. The germination rate,germination potential,relative germination rate,relative germination potential,germination index,relative salt damage index and cotyledon growth rate were measured. The results showed that alkaline salt stress had stronger inhibitory effect on seed germination and cotyledon growth than that of neutral salt stress. The low concentration of neutral salt solution（ less than 50 mmol/L） could promote the germination of Guiyou 12,but when the concentration of salt solution was higher than 50 mmol/L,it became an inhibitory effect. Under the neutral salt stress,Guiyou 12 had the highest tolerance,followed by Guiyou 62,and 8036 × Nong 14 was the worst; under the alkaline salt stress,Guiyou 62 had the highest tolerance,followed by Guiyou 12,and 8036 × Nong 14 was the worst.

关 键 词：桑树 品种 盐碱胁迫 种子萌发 

分 类 号：S888.2[农业科学—特种经济动物饲养]