摘要
以垂穗披碱草"康北"为材料,研究了不同浓度(0、50、100、150、200 mmol·L^(-1))NaCl盐胁迫对其种子萌发的影响,以及外源γ-氨基丁酸(GABA)浸种对盐胁迫的缓解作用。结果表明,随着NaCl胁迫浓度的升高,垂穗披碱草种子的各项萌发指标以及胚芽长和胚根长均呈下降趋势。在100 mmol·L^(-1)的NaCl胁迫下,0.2~2 mmol·L^(-1)的GABA浸种均能不同程度地缓解盐胁迫对垂穗披碱草种子萌发的影响,提高了发芽率、发芽势、发芽指数及活力指数,增加了幼苗重量,且缓解能力随着GABA浓度的升高而增强,其中2 mmol·L^(-1) GABA浸种处理的效果最好。
In this paper, the effects of NaCl stress with different concentrations(0, 50, 100, 150, 200 mmol·L^(-1)) on seed germination and the alleviating effect of soaking seeds with exogenous γ-aminobutyric acid(GABA) on salt stress of Elymus nutans variety ’Kangbei’ were studied. The results showed that the germination indexes, embryo length and radicle length of E. nutans seeds were decreased with the increase of NaCl stress concentration. Under 100 mmol·L^(-1) NaCl stress, the soaking seeds with 0.2-2 mmol·L^(-1) GABA could alleviate the effect of salt stress on the germination of E. nutans seeds, and improved the germination rate, germination potential, germination index and vigor index and increased the weight of seedlings. Simultaneously, the alleviating ability was enhanced with the increase of GABA concentration, and seed-soaking treatment with 2 mmol·L^(-1) GABA had the best effect.
作者
赵旭
陈仕勇
刘伟
李丹丹
文景锜
马展登
ZHAO Xu;CHEN Shiyong;LIU Wei;LI Dandan;WEN Jingqi;MA Zhandeng(Institute of Qinghai-Tibetan Plateau,Southwest Minzu University,Chengdu Sichuan 610041,China;College of Animal and Veterinary,Southwest Minzu University,Chengdu Sichuan 610041,China;College of Grassland Science and Technology,Sichuan Agricultural University,Chengdu 611130,China;Grassland Working Station of Ganzi Prefecture,Kangding Sichuan 626000,China)
出处
《种子》
北大核心
2021年第7期39-44,共6页
Seed
基金
四川省应用基础项目(2019 YJ 0253)
四川省农业科技成果转化项目(2020 NZZJ 004)
四川省十四五饲草育种攻关项目(2021 YFYZ 0013)。
