Cell wall modification induced by an arbuscular mycorrhizal fungus enhanced cadmium fixation in rice root

Meng Ying GAO, Xun Wen CHEN, Wei Xiong HUANG, Li WU, Zheng Sheng YU, Lei XIANG, Ce Hui MO, Yan Wen LI, Quan Ying CAI, Ming Hung WONG, Hui LI

Research output: Contribution to journalArticlespeer-review

2 Citations (Scopus)

Abstract

The chemistry of root cell wall of rice could be changed by inoculation of arbuscular mycorrhizal fungi (AMF). Hydroponic experiments were conducted to investigate the roles of such changes on cadmium (Cd) uptake and distribution in rice. Results showed that inoculation of AM fungus Rhizophagus intraradices (RI) significantly enhanced (p < 0.05) shoot biomass, plant height and root length of rice, and decreased Cd concentration in shoot and root under Cd stress. Moreover, Cd in root was mainly found in pectin and hemicellulose 1 (HC1) components of root cell wall. Inoculation of RI increased the levels of pectin, HC1 and lignin content, accompanied by the increments of L-phenylalanine ammonia-lyase (PAL) and pectin methylesterase (PME) activities. Results of Fourier transform infrared spectroscopy further showed that more hydroxyl and carboxyl groups in root cell wall were observed in mycorrhizal treatment, compared with control. This study demonstrates that cell wall components could be the locations for Cd fixation, which reduced Cd transportation from root to shoot. Inoculation of AMF may remodel root cell wall biosynthesis and affect the characteristics of Cd fixation. The entering and fixing mechanisms should be further studied. Copyright © 2021 Elsevier B.V. All rights reserved.
Original languageEnglish
Article number125894
JournalJournal of Hazardous Materials
Volume416
Early online date15 Apr 2021
DOIs
Publication statusPublished - 15 Aug 2021

Citation

Gao, M. Y., Chen, X. W., Huang, W. X., Wu, L., Yu, Z. S., Xiang, L., . . . Li, H. (2021). Cell wall modification induced by an arbuscular mycorrhizal fungus enhanced cadmium fixation in rice root. Journal of Hazardous Materials, 416. Retrieved from https://doi.org/10.1016/j.jhazmat.2021.125894

Keywords

  • Heavy metal
  • Cereal
  • Pectin methylesterase
  • Hemicellulose
  • FTIR

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