草业科学2026，Vol.43Issue(4)：924-933,10.DOI:10.11829/j.issn.1001-0629.2025-0545
钼和汞胁迫对辽宁碱蓬二型种子幼苗生长及生理特性的影响
Effects of molybdenum and mercury stress on growth and physiological characteristics of seedlings from dimorphic seeds of Suaeda liaotungensis
摘要
Abstract
This study investigated the effects of different Mo and Hg concentrations on the growth and physiological metabolism of seedlings from the dimorphic seeds of the halophyte Suaeda liaotungensis and explored their tolerance to heavy metal stress.The research provides a theoretical basis for the development and utilization of S.liaotungensis in remediating heavy metal-contaminated saline-alkali soils.The root length,shoot length,and root and shoot tolerance indices in seedlings of dimorphic seeds of S.liaotungensis decreased with increasing Mo2+and Hg2+concentrations.Seedlings from black and brown seeds exhibited greater tolerance to Hg and Mo stress,respectively.Under Mo and Hg stress,physiological indices such as malondialdehyde(MDA),catalase(CAT),soluble sugars,and proline displayed a significant increasing trend(P<0.05),whereas peroxidase(POD)showed a significant decreasing trend(P<0.05).In addition,under Mo and Hg stress,the root and shoot lengths of seedlings from dimorphic seeds were positively correlated with POD,but negatively correlated with MDA,CAT,proline,and soluble sugars.This indicates that the seedlings of dimorphic seeds adapt to Mo and Hg stress by accumulating large amounts of proline and soluble sugars,and elevating CAT activity.The differences in the tolerance of the seedlings dimorphic seeds of S.liaotungensis to heavy metal stress have driven the evolution of more adaptive ecological strategies.This provides an important theoretical basis for studying its tolerance mechanism to heavy metal stress,and confirms the value of this species in remediating heavy metal-contaminated saline-alkali soils.关键词
钼胁迫/汞胁迫/辽宁碱蓬/二型种子/幼苗生长/生理指标Key words
molybdenum stress/mercury stress/Suaeda liaotungensis/dimorphic seeds/seedling growth/physiological indicators引用本文复制引用
曹艺子涵,吴春艳,丁浩然,程诺,宋洁琼..钼和汞胁迫对辽宁碱蓬二型种子幼苗生长及生理特性的影响[J].草业科学,2026,43(4):924-933,10.基金项目
国家自然科学基金项目(32300315) （32300315）
大连市科技人才创新支持计划项目(2024RY036) （2024RY036）
