摘要
绿穗苋(Amaranthus hybridus)是一种新型的优质牧草,不同品种的绿穗苋耐盐碱性差异较大。为了筛选耐盐碱性强的优良种质资源和育种材料,本研究选用8份不同基因型的绿穗苋种子为试验材料,采用培养皿滤纸发芽法测定分析了盐碱(100 mmol·L^(-1)NaHCO_(3)溶液,pH 8.35)胁迫对种子发芽势、发芽率、发芽指数、根长和芽长等性状的影响。结果表明,参试的8份绿穗苋种子在NaHCO_(3)胁迫下发芽指数和活力指数均受到一定的抑制,且不同材料对NaHCO_(3)胁迫的响应具有明显差异。通过模糊隶属函数对8份绿穗苋种子萌发期耐盐碱性进行综合性评价,结果表明,不同基因型的绿穗苋种子的耐盐碱性由强到弱顺序为:Ahb1>Ahb911>Ahb2>Ahb984>Ahb979>Ahb1025>Ahb986>Ahb1011。
Amaranthus hybridus is a new type of forage grass with high quality,which has a great difference in salt-alkali tolerance among different varieties.To select the germplasm resources and breeding materials with high saline-alkali tolerance,seeds of 8 A.hybridus genotypes were germinated in a sterilized NaHCO_(3) solution(100 mmol·L^(-1),pH=8.35).In this study,the seed germination traits including germination potential,germination rate,germination index,root length and bud length were investigated.The results showed that the response of 8 A.hybridus to saline-alkali stress was different,and compared with the control group,saline-alkali stress inhibited the seed germination and seeding growth of all A.hybridus genotypes.The membership function was used to synthetically assess the salt tolerance of 8 A.hybridus in germination stage.The results indicated that the 8 resources can be arranged as follows in the decreasing order of salt tolerance:Ahb1>Ahb911>Ahb2>Ahb984>Ahb979>Ahb1025>Ahb986>Ahb1011.
作者
朱依晗
刘宁芳
胡龙兴
徐倩
ZHU Yi-han;LIU Ning-fang;HU Long-xing;XU Qian(Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha, Hunan Province 410128,China)
出处
《草地学报》
CAS
CSCD
北大核心
2021年第10期2176-2183,共8页
Acta Agrestia Sinica
基金
湖南省教育厅项目(18B114,20C0934)
湖南省生态环境厅项目共同资助。
关键词
绿穗苋
碱性盐胁迫
种子发芽
Amaranthus hybridus
Alkaline salt stress
Seed germination
作者简介
朱依晗(1994-),女,汉族,湖南郴州人,硕士研究生,主要从事牧草逆境生理研究,E-mail:1347062601@qq.com;通信作者:胡龙兴,E-mail:grass@hunau.edu.cn;通信作者:徐倩,xq20052005@126.com。
