Publication detail

The arbuscular mycorrhizal fungus Rhizophagus irregularis differentially regulates the copper response of two maize cultivars differing in copper tolerance

MERLOS RODRIGO, M. ZÍTKA, O. ADAM, V. CONCEPCIÓN AZCÓN-AGUILAR NURRIA FERROL

Original Title

The arbuscular mycorrhizal fungus Rhizophagus irregularis differentially regulates the copper response of two maize cultivars differing in copper tolerance

Type

journal article in Web of Science

Language

English

Original Abstract

Arbuscular mycorrhiza can increase plant tolerance to heavy metals. The effects of arbuscular mycorrhiza on plant metal tolerance vary depending on the fungal and plant species involved. Here, we report the effect of the arbuscular mycorrhizal fungus Rhizophagus irregularis on the physiological and biochemical responses to Cu of two maize genotypes differing in Cu tolerance, the Cu-sensitive cv. Orense and the Cu-tolerant cv. Oropesa. Development of the symbiosis confers an increased Cu tolerance to cv. Orense. Root and shoot Cu concentrations were lower in mycorrhizal than in non-mycorrhizal plants of both cultivars. Shoot lipid peroxidation increased with soil Cu content only in non-mycorrhizal plants of the Cu-sensitive cultivar. Root lipid peroxidation increased with soil Cu content, except in mycorrhizal plants grown at 250 mg Cu kg−1soil. In shoots of mycorrhizal plants of both cultivars, superoxide dismutase, ascorbate peroxidase, catalase and glutathione reductase activities were not affected by soil Cu content. In Cu-supplemented soils, total phytochelatin content increased in shoots of mycorrhizal cv. Orense but decreased in cv. Oropesa. Overall, these data suggest that the increased Cu tolerance of mycorrhizal plants of cv. Orense could be due to an increased induction of shoot phytochelatin biosynthesis by the symbiosis in this cultivar.

Keywords

Arbuscular mycorrhiza; Copper; Maize; Oxidative stress; Phytochelatins

Authors

MERLOS RODRIGO, M.; ZÍTKA, O.; ADAM, V.; CONCEPCIÓN AZCÓN-AGUILAR; NURRIA FERROL

Released

1. 7. 2017

ISBN

0168-9452

Periodical

PLANT SCIENCE

Year of study

253

Number

1

State

Ireland

Pages from

68

Pages to

76

Pages count

9

BibTex

@article{BUT137877,
  author="MERLOS RODRIGO, M. and ZÍTKA, O. and ADAM, V. and CONCEPCIÓN AZCÓN-AGUILAR and NURRIA FERROL",
  title="The arbuscular mycorrhizal fungus Rhizophagus irregularis differentially regulates the copper response of two maize cultivars differing in copper tolerance",
  journal="PLANT SCIENCE",
  year="2017",
  volume="253",
  number="1",
  pages="68--76",
  doi="10.1016/j.plantsci.2016.09.010",
  issn="0168-9452"
}