黑麦草属9个品种萌发及苗期耐盐性研究  

Evaluation of salt tolerance of 9 cultivars of Lolium spp.in germination and seedling stage

作　　者：李孔晨[1] 卢欣石[1] 

机构地区：[1]北京林业大学草地资源与生态实验室,北京400083

出　　处：《草业科学》2008年第3期111-115,共5页Pratacultural Science

基　　金："十一五"国家科技支撑课题"优质抗逆专用草新品种选育(2006BAD01A19-2);农业部草地农业生态系统学重点开放实验室部分资助

摘　　要：通过不同浓度的NaCl对黑麦草属Lolium9个品种的种子和幼苗期进行处理,研究其对相对发芽率、相对发芽势、发芽进程、盐害级别、生长高度、相对地上生物量、细胞膜透性、叶绿素含量、叶片相对含水量、叶片脯氨酸含量等的影响,筛选出主要的耐盐指标和耐盐性强的品种。结果表明:随着盐浓度的升高,相对发芽率、相对发芽势、生长高度、相对地上生物量、叶片相对含水量呈现出下降的趋势;细胞膜透性、叶片脯氨酸含量与盐浓度成正比;而叶绿素的变化表现出的规律则不明显。通过萌发期和苗期耐盐性的综合评价得出,草坪型爱神特、金石和饲用型海湾属耐盐材料,而草坪型美达丽、夜影,饲用型凤凰属敏感材料,其他材料属中等耐盐材料。The seed germination and seedling were studied on 9 seed samples through simulating salt stress which was designed at different salinity levels. The performances of the materials were evaluated in terms of seed relative germination rate, relative germination potential, germination process, salt hurt levels, seedling height, relative aboveground biomass, relative conductivity, chlorophyll content, RWC and proline content in order to choose major physiological index and better materials. The results indicated that with the increasing of salt stress, all materials showed a decrease to various extents in relative germination rate, relative germination potential, plant height, relative aboveground biomass, RWC, while relative conductivity and proline content had opposite change. The rule of chlorophyll content was not obvious. The comprehensive appraisal resulted in salt tolerant groups including Accent brand, Key stone and Gulf, sensitive groups including Medalist, Evening shade, Phoenix, and intermediate groups including the others.

关 键 词：黑麦草属 耐盐 萌发期 苗期 生理指标 

分 类 号：S54[农业科学—作物学]