Silencing MdGH3-2/12 in apple reduces cadmium resistance via the regulation of AM colonization.

Abstract:

:Arbuscular mycorrhizal fungi (AMF) can form a symbiotic relationship with most terrestrial plant roots, promote plant growth, and heavy metal (HM) tolerance and thus plays a crucial role in phytoremediation. However, research on the relationship between colonization level and HM tolerance is limited. In this study, apple (Malus domestica) Gretchen Hagen3 genes MdGH3-2/12 silencing plants were treated with four AMF and Cd combination treatments to determine AMF colonization levels, biomass, Cd accumulation, photosynthesis, fluorescence, reactive oxygen species (ROS) and antioxidant substance accumulation, and Cd uptake, transport and detoxification gene expression levels. Results indicate the greater sensitivity of transgenic plants under AMF inoculation and Cd treatment compared with wild type (WT) via lower AMF colonization levels, biomass accumulation, photosynthetic parameters, and the accumulation and clearance homeostasis of ROS, as well as lower detoxification expression levels and higher Cd uptake and transport expression levels. Our study essentially demonstrates that MdGH3-2/12 plays an important role in Cd stress tolerance by regulating AM colonization in apple.

journal_name

Chemosphere

journal_title

Chemosphere

authors

Huang D,Wang Q,Zou Y,Ma M,Jing G,Ma F,Li C

doi

10.1016/j.chemosphere.2020.129407

subject

Has Abstract

pub_date

2020-12-22 00:00:00

pages

129407

eissn

0045-6535

issn

1879-1298

pii

S0045-6535(20)33605-5

journal_volume

269

pub_type

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