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Tolerance and detoxification mechanisms to cadmium stress by hyperaccumulator Erigeron annuus include molecule synthesis in root exudate

Zhang, Hong and Heal, Kate and Zhu, Xiangdong and Tigabu, Mulualem and Xue, Yanan and Zhou, Chuifan (2021). Tolerance and detoxification mechanisms to cadmium stress by hyperaccumulator Erigeron annuus include molecule synthesis in root exudate. Ecotoxicology and Environmental Safety. 219 , 112359
[Research article]

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Abstract

Cadmium (Cd) is one of the most toxic environmental pollutants affecting the growth and reproduction of various plants. Analysis of the biological adaptation and tolerance mechanisms of the hyperaccumulator Erigeron annuus to Cd stress may help identify new plant species for phytoremediation and in optimizing the process. This study is to the first to analyze the molecular composition and diversity of dissolved organic matter (DOM) secreted by roots using FT-ICR MS, and multiple physiological and biochemical indexes of E. annuus seedlings grown in solutions containing 0-200 Cd mu mol L-1. The results showed that E. annuus had strong photosynthetic adaptation and protection ability under Cd stress. Cd was immobilized or compartmentalized by cell walls and vacuoles in the plant, thus alleviating Cd stress. Activation of anti-oxidation defense mechanisms also played an important role in alleviating or eliminating Cd toxicity in E. annuus. High Cd stress promoted production of a higher proportion of new molecules in DOM secreted by E. annuus roots compared to low Cd stress. DOM secreted by roots contributed to plant resistance to Cd-induced stress via producing more carbohydrates, aromatic structures and tannins. Results indicate the mechanisms underpinning the potential use of E. annuus as a phytoremediator in environments with moderate Cd pollution.

Authors/Creators:Zhang, Hong and Heal, Kate and Zhu, Xiangdong and Tigabu, Mulualem and Xue, Yanan and Zhou, Chuifan
Title:Tolerance and detoxification mechanisms to cadmium stress by hyperaccumulator Erigeron annuus include molecule synthesis in root exudate
Series Name/Journal:Ecotoxicology and Environmental Safety
Year of publishing :2021
Volume:219
Article number:112359
Number of Pages:10
Publisher:ACADEMIC PRESS INC ELSEVIER SCIENCE
ISSN:0147-6513
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:Antioxidants, Cadmium stress, Dissolved organic matter, FT-ICR MS, Proline
URN:NBN:urn:nbn:se:slu:epsilon-p-112211
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112211
Additional ID:
Type of IDID
DOI10.1016/j.ecoenv.2021.112359
Web of Science (WoS)000657192800004
ID Code:24501
Faculty:S - Faculty of Forest Sciences
Department:(S) > Southern Swedish Forest Research Centre
Deposited By: SLUpub Connector
Deposited On:10 Jun 2021 16:03
Metadata Last Modified:10 Jun 2021 16:11

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