作物杂志,2025, 第5期: 209220 doi: 10.16035/j.issn.1001-7283.2025.05.028
杜含梅1(
), 谭露1, 李声春1, 王清海1, 徐洲1, 吴丹丹2, 王安虎1(
)
Du Hanmei1(
), Tan Lu1, Li Shengchun1, Wang Qinghai1, Xu Zhou1, Wu Dandan2, Wang Anhu1(
)
摘要: 为探究镉胁迫对苦荞种子萌发和幼苗生理特性的影响,设置了0、50、100、200和300 μmol/L 5个CdCl2处理浓度,分析其对14份苦荞种质种子萌发、幼苗生理特性及其体内镉积累的影响。结果发现,不同浓度镉胁迫对苦荞的影响存在差异,随镉浓度增加,多数苦荞种质的发芽势、发芽率、发芽指数和活力指数呈下降趋势,高浓度(300 μmol/L)镉胁迫对种子萌发及幼苗生长均有抑制作用。综合评价分析发现,所有材料被分为3类,其中有6份材料为耐镉型,6份镉敏感型和2份中间型;其中,V14的镉耐受性最强,V4的镉耐受性最弱;根系和地上部分的镉积累随镉浓度的增加而增加,根系中镉离子的积累量远高于地上部分;镉胁迫将导致苦荞种子产生氧化应激,丙二醛和超氧阴离子含量随镉浓度的增加而增加,超氧化物歧化酶、过氧化物酶、过氧化氢酶和抗坏血酸过氧化物酶的活性则表现出先增加后降低的趋势,且在耐镉型苦荞种质中这些酶活性比镉敏感型种质高。
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