当前位置： SCI文献检索 > ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY期刊下所有文献 > Arbuscular mycorrhiza augments cadmium tolerance in soybean by altering accumulation and partitioning of nutrient elements, and related gene expression.

Arbuscular mycorrhiza augments cadmium tolerance in soybean by altering accumulation and partitioning of nutrient elements, and related gene expression.

Abstract：

:Arbuscular mycorrhizal (AM) fungi can protect plants against cadmium (Cd) stress, and are the most prominent symbiotic fungi for contribution to phytoremediation. However, the tolerance mechanism for AM symbiosis on Cd toxicity still remains unclear, especially the related molecular mechanisms. In this study, different Cd treatments were applied to two soybean genotypes with different Cd tolerance in the presence or absence of AM fungal inoculation. The results showed that Cd addition obviously decreased AM colonization. AM symbiosis significantly increased plant dry weight, root growth, and P acquisition in Cd-tolerant HX3 genotype at Cd addition treatments. The effectiveness was associated with a concomitant increased expression of the AM inducible phosphate (Pi) transporter genes GmPT8, GmPT9, GmPT10, and upregulated expression of P-type heavy metal ATPase gene GmHMA19. Additionally, AM fungal inoculation effectively impacted the partitioning of Mg, Cu and Zn, including increased Mg, and decreased Cu and Zn relative concentrations in shoots of Cd tolerant HX3. Taken together, these results suggest that AM symbiosis can alleviate Cd toxicity in soybean through enhanced P nutrition, up-regulated expression of AM inducible GmPTs and GmHMA19, as well as, the alteration of the partitioning of essential nutrient elements.

journal_name

Ecotoxicol Environ Saf

journal_title

Ecotoxicology and environmental safety

authors

Cui G,Ai S,Chen K,Wang X

doi

10.1016/j.ecoenv.2018.12.093

subject

Has Abstract

pub_date

2019-04-30 00:00:00

pages

231-239

eissn

0147-6513

issn

1090-2414

pii

S0147-6513(18)31392-7

journal_volume

171

pub_type

杂志文章

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