盐胁迫下不同桑品种种子萌发特性研究  

Study on Seed Germination Characteristics of Different Mulberry Materials under Salt Stress

作　　者：祝娟娟[1] 丁天龙[1] 魏从进[1] 边晨凯[1] 刘雪琴[1] 范丽[1] 曾其伟[1] 何宁佳[1] 赵爱春[1] 

机构地区：[1]家蚕基因组生物学国家重点实验室西南大学蚕学与系统生物学研究所,重庆400716

出　　处：《蚕学通讯》2013年第1期1-6,共6页Newsletter of Sericultural Science

基　　金：重庆市自然科学基金计划项目(编号:cstc2012jjA80039和cstc2012jjys80001)

摘　　要：设置7个NaCl质量浓度梯度(0,0.2%,0.4%,0.6%,0.8%,1.0%,1.2%)对粤桑69851、沙2×伦109、河南实生桑、桂优62四个桑品种种子进行NaCl胁迫处理,测定不同品种在不同处理下的发芽率、发芽势、发芽指数、盐害指数及胚根、胚芽长等指标,以研究NaCl胁迫对不同桑品种种子萌发特性的影响。结果表明,NaCl胁迫对不同桑种种子的萌发有相似的作用模式。低浓度的NaCl溶液(小于0.4%)可促进沙×伦109、河南实生桑、桂优62种子的萌发,当NaCl溶液浓度高于0.4%时则变为抑制作用。综合各项指标分析表明桂优62的耐盐性最强,其次为沙×伦109,再次为粤桑69851,河南实生桑的耐盐性最差。Seeds of mulberry varieties Yue-Sang69851, Sha2 X Lunl09, He-Nan Sang and Gui-You62 were treated with different mass concentrations of NaCl solution （0%,0.2%,0.4%, 0.6%, 0.8%,1.0% and 1.2%）, and their germination rate, germination vigor, germination index, salt injury index and radicle and plumule length were determined so as to study the in fluence of NaCl stress on their germination ability. The results showed that there was a simi- lar pattern of seed germination of different mulberry varieties under NaCl stress. Lower NaCl concentrations （〈0.4%） promoted the germination of Sha2 X Lun109, He-Nan-Sang and Gui-You62, while higher NaCl concentrations （〉0.4%） inhibited it. Taking all the parameters into consideration, it is concluded that of the four mulberry varieties studied Gui You62 had the best salt tolerance, followed in order by Sha2xLunl09, Yue-Sang69851 and He-Nan Sang.

关 键 词：桑树 NACL胁迫 萌发特性 耐盐性 

分 类 号：S888.2[农业科学—特种经济动物饲养]