NaCl胁迫对六个不同类型黑果枸杞种子萌发的影响  

Effects of NaCl Stress on Seed Germination of Six Lycium ruthenicum Murr. Types

作　　者：刘秋辰[1] 冯建荣[1] 郝玉杰[1] 樊新民[1] 张永东 

机构地区：[1]石河子大学农学院/特色果蔬栽培生理与种质资源利用兵团重点实验室,新疆石河子832000 [2]新疆果王生态农业科技开发有限公司,乌鲁木齐830001

出　　处：《新疆农业科学》2016年第11期2040-2046,共7页Xinjiang Agricultural Sciences

基　　金：国家自然科学基金项目(31272129)~~

摘　　要：【目的】对6个不同类型的黑果枸杞种子耐盐性进行评价比较,筛选出耐盐性较高的类型,为在新疆北疆地区推广提供理论基础。【方法】以西宁野生、库尔勒野生、武威野生三个生态型及其相应的优选系：西宁优系、库尔勒优系、武威优系黑果枸杞种子为试验材料,在50、100、150、200、250、300 mmol/L Na Cl浓度下进行种子发芽试验,以发芽率达到50%为生产要求,低于50%为受到明显胁迫的标准,测定不同浓度Na Cl对发芽率、相对盐害率、耐盐浓度及幼苗生长的影响。【结果】在50~300 mmol/L Na Cl浓度处理下,发芽率、胚根、胚轴长随Na Cl浓度升高总体呈显著下降趋势;用种子发芽率和Na Cl浓度进行回归分析,发现优选型黑果枸杞种子耐盐临界浓度显著高于野生型,优选型耐盐临界浓度为150~300 mmol/L,野生型耐盐临界浓度为100~150 mmol/L。【结论】武威优系、库尔勒优系耐盐能力显著较强;西宁优系、库尔勒野生中等;西宁野生、武威野生显著较差。【Objective】The objective of this experiment is to compare the salt tolerance of six types of Lycium ruthenicum Murr. The results of this study might provide a technical basis for promoting the best type in Northern Xinjiang.【Method】The study included three ecotypes of L. ruthenicum（ Xining wild type,Korla wild type,Wuwei wild type） and the corresponding promising selection（ Xining promising selection,Korla promising selection,Wuwei promising selection）. The seeds were treated with Na Cl concentrations of 50,100,150,200,250,and 300 mmol / L. A standard of 50 percent germination rates was set for production requirements. Seeds were considered to be under significant duress when the germination rates were less than 50 percent. Seed germination rate,relative salt injury rate,salt tolerance concentration,and seedling growth were measured under different Na Cl concentrations.【Result】Germination rate,seedling growth decreased as Na Cl concentrations increased between 50 and 300 mmol / L. Regression analysis was conducted to determine the relationship between Na Cl concentration and germination rate. The regression analysis indicated that the critical Na Cl concentration was greater for the promising selection type seeds than for wild type seeds. The critical Na Cl concentration was 150-300 mmol / L for the promising selection type seeds and 100-150 mmol / L for the wild type seeds.【Conclusion】The results indicated that among the six types,the promising selection Wuwei type and the promising selection Korla type had relatively high salt tolerance,whereas wild Xining type and wild Wuwei type had relatively low salt tolerance.

关 键 词：黑果枸杞 NACL胁迫 种子萌发 

分 类 号：S663[农业科学—果树学]