草业科学2018，Vol.35Issue(1)：106-114,9.DOI:10.11829/j.issn.1001-0629.2017-0172
旱、盐胁迫下黄芪种子萌发及其对水杨酸的响应
Variations in seed germination and salicylic acid protective effect between two cultivars of Astragalus membranaceus under drought and salt stress
摘要
Abstract
To study the variations in seed germination between Astragalus membranaceus and A.membrana-ceus var.mongholicus under polyethylene glycol (PEG)and NaCl stresses,and to explore the differences in protective effects of salicylic acid (SA)for the two cultivars of A.membranaceus under severe PEG and NaCl stresses,we measured (1)the total germination percentage (TGP),germination energy (GE),vigor index (VI),shoot length (SL),root length (RL),shoot dry weight (SDW),and root dry weight (RDW)of two cultivars of A.membranaceus under gradually enhanced PEG and NaCl stresses;and(2)the differences in TGP of the two cultivars between application methods and concentrations of SA under severe PEG and NaCl stresses. Our results showed that all measurements of the two cultivars decreased with increasing stress intensity.Both low concentrations of PEG and NaCl can enhance seed germination in A.membranaceus.The VI in A.membranaceus var.mongholicus was higher than in A.membranaceus at —0.5 MPa PEG and —0.7 MPa NaCl stress levels (P<0.0 5).Soaking seeds with SA can enhance the TGP of of A.membranaceus.and A.membranaceus var.mongholicas The stress tolerance of A.membranaceus var.mongholicus was stronger than A.membranaceus.There were signifi-cant differences in seed performances between the two cultivars treated with SA.Soaking seeds with SA is was more effective than mixing seeds with SA.关键词
膜荚黄芪/蒙古黄芪/种子萌发/水杨酸/PEG/NaClKey words
Astragalus membranaceus/Astragalus membranaceus var.mongholicus/seed germination/sali-cylic acid/PEG/NaCl分类
农业科技引用本文复制引用
王楠,高静,黄文静,李铂,唐志书,宋忠兴..旱、盐胁迫下黄芪种子萌发及其对水杨酸的响应[J].草业科学,2018,35(1):106-114,9.基金项目
陕西省教育厅专项科研计划(16JK1202) （16JK1202）
陕西中医药大学科研基金项目(2016QN33) （2016QN33）
国家中药标准化项目(ZYBZH-C-QIN-45) （ZYBZH-C-QIN-45）
现代农业产业技术体系建设专项资金(CARS-21) （CARS-21）
