干旱地区农业研究Issue(5)：73-77,265,6.
不同产地扁蓿豆种子萌发期抗旱性综合评价
Evaluation of drought resistance of different habitats of Medicago ruthenica seed germination stage under PEG-6000 stress
摘要
Abstract
Drought resistances were evaluated based on seeds germination stage under different osmotic potential of polyethylene glycol (PEG 6000)among 12 accessions of Medicago ruthenicac collected from Jingtai,Longxi,Zhenyuan, Yongchang,Tianshui,Yuzhong,Ningxian,Xiahe,Linxia and Weiyuan of Gansu Prvience,Tumote of Inner Mongolia, and Longxian of Shanxi .The results showed that the germination rate,germination index and vigor index of M.rutheni-ca decreased,and the growth of plumule and radical were inhibited under PEG stress .The seed germination of M. ruthenica (Longxi)was improved by draught stress of -0 .3 MPa osmotic potential,and the relative germination index and relative vigor index were significantly higher than other 1 1 materials under this concentration .The relative radical length of M.ruthenica (Jingtai)and M.ruthenica (Tumote)were higher than others under draught stress of -0 .3 MPa osmotic potential,which showed some drought resistance .The growth of radical was seriously inhibited under high osmotic potential stress .Based on the relative germination rate,relative germination index,relative vigor index,relative plumule length and relative radical length,The comprehensive evaluation of 12 accessions of M.ruthenica by the subor-dinate function method indicated that the drought resistance ability were ranked as Jingtai>Longxi>Tumote>Zhenyuan>Yongchang>Tianshui>Yuzhong>Ningxian>Xiahe>Linxia>Longxian (from Shanxi)>Weiyuan .关键词
扁蓿豆/萌发期/PEG胁迫/隶属函数Key words
Medicago ruthenica/seed germination/PEG stress/subordinate function分类
农业科技引用本文复制引用
肖红,徐长林,鱼小军,景媛媛,冯舒方,张玉琴,郑致宏..不同产地扁蓿豆种子萌发期抗旱性综合评价[J].干旱地区农业研究,2014,(5):73-77,265,6.基金项目
甘肃省高校基本科研业务费资助 （）
