干旱地区农业研究2025，Vol.43Issue(5)：26-33,46,9.DOI:10.7606/j.issn.1000-7601.2025.05.03
干旱胁迫下4种一年生植物种子萌发特性及抗旱性评价
Seed germination characteristics and drought resistance evaluation of four annual plants under drought stress
摘要
Abstract
This study aimed to investigate the effects of drought stress on seed germination of annual desert herbaceous plants.The seeds of Bassia dasyphylla,Halogeton arachnoideus,Agriophyllum squarrosum,and Er-ag rostis pilosa in the Minqin Desert Oasis Transitional Zone were used as experimental materials.PEG-6000 of dif-ferent concentrations was applied to simulate drought stress.The response of germination indicators,growth indica-tors,and germination recovery rate of four annual herbaceous plant seeds to drought stress was analyzed,and the drought resistance of four plant seeds was evaluated comprehensively by the subordinate function method.The results showed that:(1)As PEG-6000 concentration increased,the germination indices of all four plant species declined significantly.When PEG-6000 concentrations were ≥20％,30％,10％,and 30％,seed germination of B.dasyphylla,H.arachnoideus,A.squarrosum,and E.pilosa was significantly inhibited.Compared to the control,their germination rates decreased markedly by 14.66％～99.14％,65.71％～83.81％,5.00％～95.00％,and 44.86％～73.83％,correspondingly.The germination potential and germination index of A.squarrosum seeds were significantly higher than those of the other three species(P＜0.05),while the vitality index of H.arachnoideus and B.dasyphyl-la seeds was significantly higher than that of the other two species(P＜0.05).(2)The germ length,radicle length,and fresh mass of four plant seeds decreased with increasing PEG-6000 concentrations.When PEG-6000 concen-tration was ≥10％,the growth indicators of B.dasyphylla,H.arachnoideus,A.squarrosum,and E.pilosa seeds were significantly inhibited,showing reductions of 21.57％～98.24％,17.48％～87.91％,16.64％～89.58％,and 12.86％～94.87％,respectively,compared to the control group.(3)After drought stress relief,recovery germination rates varied among the species,ranked as B.dasyphylla＞E.pilosa＞A.squarrosum＞H.arachnoideus.Seeds of B.dasyphylla,H.arachnoideus,and A.squarrosum could resume germination at PEG concentrations of 5％～25％,while E.pilosa seeds exhibited recovery germination across all tested concentrations.(4)The drought resistance of the seeds of four plants during germination was as follows:H.arachnoideus＞A.squarrosum＞B.dasyphylla＞E.pilosa.关键词
荒漠草本植物/一年生植物/干旱胁迫/萌发特性/抗旱性评价Key words
desert herbaceous plant/annual plant/drought stress/germination characteristics/drought resist-ance evaluation分类
农业科学引用本文复制引用
肖斌,郭树江,李亚,李得禄,王飞..干旱胁迫下4种一年生植物种子萌发特性及抗旱性评价[J].干旱地区农业研究,2025,43(5):26-33,46,9.基金项目
中央引导地方发展专项(2424ZYQA052) （2424ZYQA052）
国家地区科学基金(32360271,32360329) （32360271,32360329）
中央林业草原生态保护恢复资金项目(甘林规函[2024]755号) （甘林规函[2024]755号）
