镉胁迫下AMF与DSE双接种促进黄芪生长和土壤镉化学形态转化

doi:10.3969/j.issn.1000-1565.2026.05.010

摘要/Abstract

摘要： 镉(cadmium,Cd)是典型重金属污染物,严重抑制药用植物生长.通过设置0、5、10、15 mg/kg共4个Cd质量分数开展盆栽实验,探究丛枝菌根真菌(arbuscular mycorrhizal fungi,AMF)与深色有隔内生真菌(dark septate endophytes,DSE)双接种对黄芪(Astragalus mongholicus)生长及Cd耐受性的影响.结果表明:AMF和DSE均能有效侵染黄芪根系,各接菌处理显著提高了黄芪地上、地下生物量和药用成分含量;高Cd质量分数下,双接种相较单接种显著提高了植株渗透调节物质含量,改善了根际土壤养分状况,降低了根部Cd含量,并促使土壤Cd由可交换态向残渣态转化.接菌种类和土壤因子交互作用是影响黄芪生长、生理指标的主要因素,黄芪Cd含量主要受土壤因子和Cd胁迫交互作用调控.黄芪地上、地下生物量与土壤因子、药用成分含量显著正相关,与丙二醛含量显著负相关.双接种AMF和DSE通过生理调控与土壤Cd化学形态转化,协同缓解Cd胁迫对黄芪生长的抑制作用,为重金属污染土壤修复及药用植物培育提供了有效途径.

关键词: 丛枝菌根真菌, 深色有隔内生真菌, 促生降镉, 黄芪, 镉胁迫

中图分类号:

Q948.12

李春苗, 孟静静, 刘秀荣, 张楠楠, 杨晓童, 贺超, 贺学礼. 镉胁迫下AMF与DSE双接种促进黄芪生长和土壤镉化学形态转化[J]. 河北大学学报(自然科学版), 2026, 46(5): 541-553.

LI Chunmiao, MENG Jingjing, LIU Xiurong, ZHANG Nannan, YANG Xiaotong, HE Chao, HE Xueli. Dual inoculation of AMF and DSE promotes the growth of Astragalus mongholicus and the transformation of cadmium chemical forms in soil under cadmium stress[J]. Journal of Hebei University(Natural Science Edition), 2026, 46(5): 541-553.

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