桑树种子萌发和幼苗生长耐镉耐铅能力综合评价  

COMPREHENSIVE EVALUATION OF CADMIUM AND LEAD TOLERANCE IN THE SEED GERMINATION AND SEEDLING GROWTH OF MULBERRY

作　　者：唐璐锜 许自龙 陈蓉萍 魏佳[2] 刘培刚[2] 朱燕[2] 林天宝[2] 刘岩[2] 范志强 TANG Luqi;XU Zilong;CHEN Rongping;WEI Jia;LIU Peigang;ZHU Yan;LIN Tianbao;LIU Yan;FAN Zhiqiang(School of Life Sciences,Anqing Normal University,Anqing,Anhui 246133,China;Sericulture and Tea Research Institute,Zhejiang Academy of Agricultural Sciences,Hangzhou,Zhejiang 310021,China)

机构地区：[1]安庆师范大学生命科学学院,安徽安庆246133 [2]浙江省农业科学院蚕桑与茶叶研究所,浙江杭州310021

出　　处：《井冈山大学学报（自然科学版）》2024年第6期49-58,共10页Journal of Jinggangshan University (Natural Science)

基　　金：“十四五”农业新品种选育重大育种专项蚕桑协作项目(2021C02072-5);现代农业产业技术体系建设专项(CARS-18-270203);皖西南生物多样性和生态保护安徽省重点实验室开放基金项目(2020zd04);安庆师范大学大学生创新创业训练计划项目(20220710)。

摘　　要：为探究重金属镉(Cd)、铅(Pb)胁迫对桑树种子萌发及幼苗生长的影响,评价其耐性,筛选抗性更好的桑树种质资源,以浙桑杂1号(ZZ-1)~浙桑杂9号(ZZ-9)(9种)桑树杂交品种为材料,分别测定了不同浓度重金属Cd(0、25、100、400、1000 mg/L)、Pb(0、250、500、1000、2000 mg/L)单一处理下,桑树种子萌发及幼苗生长的各项指标。结果表明:低浓度单一的Cd、Pb处理对桑树种子萌发未见明显影响,当单一Cd处理浓度>100 mg/L,以及单一Pb处理浓度>250 mg/L时,9种桑树种子的种子萌发指标以及种子活力指数、幼苗下胚轴和胚根长度等指标,均会随着重金属离子浓度升高而显著降低。9个品种对Cd、Pb的耐受能力存在差异,利用主成分分析和隶属函数法对其进行综合评价,其中ZZ-6耐受Cd和Pb能力最强,有望在农业生产中,作为植物修复Cd、Pb污染土壤的桑树是值得推广种植品种。In order to explore the effects of cadmium(Cd)and lead(Pb)stress on the seed germination and seedling growth of mulberry and to screen the germplasm resources with high resistance.Zheza-1(ZZ-1)~Zheza-9(ZZ-9)(9 kinds of mulberry hybrid varieties)were used as materials.The indexes of seed germination and seedling growth of mulberry were determined by Cd(0,25,100,400,1000 mg/L)and Pb(0,250,500,1000,2000 mg/L)at different concentrations.The results showed that the mulberry seed germination were not significantly inhibited by Cd and Pb at the low concentrations;but when the single Cd concentrations were more than 100 mg/L,and the single Pb concentrations were more than 250 mg/L,the seed germination index,seed vigor index,hypocotyl and radicle length of 9 mulberry seeds decreased significantly with the increase of heavy metal ion concentration.There were differences in the resistance of 9 varieties to Cd and Pb.Principal component analysis and membership function method were used to comprehensively evaluate the resistance of 9 varieties to Cd and Pb,among which ZZ-6 had the strongest resistance to Cd and Pb,and was expected to be popularized as a planting variety of mulberry in agricultural production to repair the soil contaminated by Cd and Pb.

关 键 词：桑树 CD PB 种子萌发 幼苗生长 品种筛选 

分 类 号：Q945.78[生物学—植物学]