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Dark septate endophyte enhances maize cadmium (Cd) tolerance by the remodeled host cell walls and the altered Cd subcellular distribution
Shen, Mi; Schneider, Harald1; Xu, Runbing; Cao, Guanhua2; Zhang, Hanbo; Li, Tao; Zhao, Zhiwei
2020
Source PublicationENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN0098-8472
Volume172Pages:-
AbstractEvidence accumulated in recent years supports the crucial role of remodeled cell walls (CWs) in enabling plants to adapt to environmental challenges. However, the metal tolerance and alleviation mechanisms involving the CWs by endophyte-plant interactions to toxic metals have not yet been elucidated. In the present study, these mechanisms are tested by exploring the maize (Zea mays) Cd tolerance by modifying its root CW structure via inoculation with a dark septate endophyte (DSE) fungus Exophiala pisciphila. Our present study demonstrates that the root CWs were the primary site for Cd accumulation, functioning as a sink for toxic Cd ions. Interestingly, E. pisciphila colonization significantly bioaugmented subcellular compartmentalization of maize roots and increased the Cd content of various CW subfractions through a significantly increased enzyme activity, e.g., pectin methylesterase, as well as an upregulated expression of genes involved in CW biosynthesis and changes in the contents of functional groups in pectin and hemicellulose 1 in response to Cd stress. Consequently, the enhanced Cd compartmentation in plant CWs by DSE lowers the entry of trace metals in the protoplast, thereby conferring the tolerant races of plants that can survive and thrive on metal-contaminated soils.
KeywordDark septate endophyte (DSE) Exophiala pisciphila Maize (Zea mays) Cell wall Cadmium tolerance mechanism
Subject AreaPlant Sciences ; Environmental Sciences
DOI10.1016/j.envexpbot.2020.104000
Indexed BySCI
Language英语
WOS IDWOS:000518704100013
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11662
Collection2012年后新成立研究组
Affiliation1.Yunnan Univ, State Key Lab Conservat & Utilizat Bioresources Y, Kunming 650091, Yunnan, Peoples R China
2.Chinese Acad Sci, Ctr Integrated Conservat, Xishuangbanna Trop Bot Garden, Menglun Township 666303, Yunnan, Peoples R China
3.Yunnan Univ Tradit Chinese Med, Sch Tradit Chinese Med, Kunming 650500, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Shen, Mi,Schneider, Harald,Xu, Runbing,et al. Dark septate endophyte enhances maize cadmium (Cd) tolerance by the remodeled host cell walls and the altered Cd subcellular distribution[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2020,172:-.
APA Shen, Mi.,Schneider, Harald.,Xu, Runbing.,Cao, Guanhua.,Zhang, Hanbo.,...&Zhao, Zhiwei.(2020).Dark septate endophyte enhances maize cadmium (Cd) tolerance by the remodeled host cell walls and the altered Cd subcellular distribution.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,172,-.
MLA Shen, Mi,et al."Dark septate endophyte enhances maize cadmium (Cd) tolerance by the remodeled host cell walls and the altered Cd subcellular distribution".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 172(2020):-.
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