首页|Occurrence of dark septate endophytes in Phragmites australis in the Baiyang Lake and their resistance to Cd stress

Occurrence of dark septate endophytes in Phragmites australis in the Baiyang Lake and their resistance to Cd stress

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Heavy metal pollution poses a serious hazard to human health,and microbial remediation of heavy metals in soil has been widely studied.A group of ascomycetes classified as dark septate endophytes(DSEs)colonize plant roots and benefit host plants under abiotic stress conditions.In this study,Phragmites australis,a common remediation plant in the Baiyang Lake in North China,was investigated.Soils and roots of P.australis were collected in typical heavy metal-contaminated sites,and the species diversity and community structure of DSEs in P.australis roots were studied.In addition,DSE strains were isolated,cultured,and tested for their tolerance to Cd stress.The results showed that DSEs occurred extensively in P.australis roots,forming typical dark septate hyphae,with a total colonization rate of 19.7％-83.1％o.Morphological and internal transcribed spacer sequencing analyses were used to identify 10 species within 9 genera of DSE fungi.Among these fungi,6 strains with considerable resistance to Cd stress were identified.The biomasses of Poaceascoma helicoides,Alternaria doliconidium,and Acrocalymma vagum strains increased as the Cd levels increased.These results can not only help to understand plant-DSE interactions in wetland environments,but also provide a theoretical basis for making full use of DSE fungi to alleviate heavy metal contamination in soil.

ascomycetecolonization ratecontaminated siteevenness indexheavy metalShannon-Wiener indexSimpson indexwetland

Minghui XU、Xia LI、Qiannan YE、Feng GONG、Xueli HE

展开 >

School of Life Sciences,Hebei University,Baoding 071002(China)

Key Laboratory of Microbial Diversity Research and Application of Hebei Province,Hebei University,Baoding 071002(China)

国家自然科学基金国家自然科学基金National Science Foundation of Hebei Province,ChinaNational Science Foundation of Hebei Province,ChinaNatural Science Interdisciplinary Research Program of Hebei University,ChinaPostgraduate's Innovation Fund Project of Hebei Province,China

3180034531770561C202020104322E50029DDXK202311CXZ-ZSS2023010

2024

10.1016/j.pedsph.2023.07.009

土壤圈(英文版)
中国土壤学会,中科院南京土壤研究所和土壤与农业可持续发展国家重点实验室

土壤圈(英文版)

CSTPCD
影响因子：0.477
ISSN：1002-0160
年,卷(期)：2024.34(2)