Germination Characteristics and Drought Resistance Evaluation of Seven Wild Elymus L. Germplasms in Xinjiang under Drought Stress

doi:10.6048/j.issn.1001-4330.2020.05.021

Abstract

Abstract: 【Objective】 To study the effects of drought stress on germination of wild Elymus L. materials and evaluate its drought resistance. 【Method】The experimental materials were seven wild germplasms which were collected from different areas of Xinjiang. During the whole germination period, PEG-6000 was used to simulate the drought environment and 6 different concentrations (0, 10%, 15%, 20%, 25% and 30%) were set and indicators of germination, radicle and plumule length of each material under different drought stress were measured.【Result】Low concentration of PEG promoted the germination of some materials, radicle and plumule of P03, P04, P06 and P07 germplasms. When the concentration of PEG reached more than 20%, the germination of all materials was inhibited and the length of radicle and plumule decreased.【Conclusion】The seven materials were sorted according to their drought resistance as follows: P01>P02>P03> P04>P07> P05>P06.

Key words: PEG-6000 stress; subordination function; Elymus.L; drought resistance

摘要： 【目的】研究干旱胁迫对野生披碱草种质萌发的影响,评价其抗旱性。【方法】以7份采自新疆不同地区的野生披碱草属(Elymus L.)种质资源为材料,以聚乙二醇溶液(PEG-6000)设置0、10%、15%、20%、25%和30%共6个浓度,进行萌发期抗旱试验,测定不同干旱胁迫下各种质材料发芽指标、胚根长、胚芽长变化。【结果】低浓度PEG对P03、P04、P06和P07种质材料的萌发及胚根长、胚芽长有一定促进作用;当PEG浓度达到20%以上时,7份种质材料的萌发均受到抑制,胚根长、胚芽长不断降低。【结论】7份野生披碱草属种质材料抗旱性由强至弱排序为P07>P04>P06>P01>P02> P03>P05。

关键词: PEG-6000胁迫, 隶属函数, 披碱草属, 抗旱性

CLC Number:

S543

LI Yao, SUI Xiaoqing, HAO Yuhui, ZHANG Shuzhen, CHEN Aiping, ZHANG Bo. Germination Characteristics and Drought Resistance Evaluation of Seven Wild Elymus L. Germplasms in Xinjiang under Drought Stress[J]. Xinjiang Agricultural Sciences, 2020, 57(5): 958-966.

李瑶, 隋晓青, 郝裕辉, 张树振, 陈爱萍, 张博. 干旱胁迫下新疆7份野生披碱草属种质材料萌发特性与抗旱性评价[J]. 新疆农业科学, 2020, 57(5): 958-966.

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