西北林学院学报2026，Vol.41Issue(3)：38-46,9.DOI:10.3969/j.issn.1001-7461.2026.03.04
干旱胁迫对蒙古沙冬青种子萌发及幼苗生长的影响
Effects of Drought Stress on Seed Germination and Seedling Growth of Ammopiptanthus mongolicus
摘要
Abstract
To clarify the effects of drought stress on seed germination and subsequent seedling growth and physiology of Ammopiptanthus mongolicus,so as to provide reference for plant breeding and ecological restoration in arid areas.PEG-6000 solution with gradient contents(0%,2%,4%,6%,8%,10%,12%,14%,16%,18%,20%)was set to simulate drought stress with different intensities to study the seed ger-mination,seedling morphological indexes and physiological and biochemical characteristics of A.mongoli-cus.The result showed that,Low content promoted seed germination,and seedling hypocotyls were more robust.As content increased,seed germination was inhibited.When the content was≥12%,germination rate was below 50%,germination potential below 10%,seedling cotyledons failed to unfold normally,and radicle development was hindered or even absent.With increasing stress intensity,proline(Pro)content first increased and then decreased,malondialdehyde(MDA)content continued to increase,and activities of superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT)generally showed a first increasing and then decreasing trend,with different degrees of concentration sensitivity.PEG-6000 effectively simu-lates the effects of drought stress on seed germination and seedling growth of A.mongolicus,and a dynam-ic response law of"moderate promotion and excessive inhibition"is revealed.The study concludes that 12%PEG-6000 is the suitable content for simulating drought stress on A.mongolicus seeds,at which seeds reach semi-lethality,and germination and seedling growth physiology are significantly inhibited.关键词
蒙古沙冬青/PEG-6000/干旱胁迫/种子萌发/幼苗生长Key words
Ammopiptanthus mongolicus/PEG-6000/drought stress/seed germination/seedling growth分类
农业科技引用本文复制引用
邓煜,马正政,王先英,鲁松辉,侯佳..干旱胁迫对蒙古沙冬青种子萌发及幼苗生长的影响[J].西北林学院学报,2026,41(3):38-46,9.基金项目
内蒙古自治区高等学校碳达峰碳中和研究专项(STZX20222). （STZX20222）
