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Arbuscular mycorrhiza augments cadmium tolerance in soybean by altering accumulation and partitioning of nutrient elements, and related gene expression.
Ecotoxicol Environ Saf. 2019 Apr 30; 171:231-239.EE

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.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Cui G
State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Root Biology Center, South China Agricultural University, Guangzhou 510642, China.
Ai S
Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.
Chen K
State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Root Biology Center, South China Agricultural University, Guangzhou 510642, China.
Wang X
State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Root Biology Center, South China Agricultural University, Guangzhou 510642, China. Electronic address: xrwang@scau.edu.cn.

MeSH

Biodegradation, EnvironmentalCadmiumDrug ToleranceGlomeromycotaModels, TheoreticalMycorrhizaePhosphatesPlant RootsSoil PollutantsSoybeansSpecies SpecificitySymbiosis

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30612010

Citation

Cui, Guangjuan, et al. "Arbuscular Mycorrhiza Augments Cadmium Tolerance in Soybean By Altering Accumulation and Partitioning of Nutrient Elements, and Related Gene Expression." Ecotoxicology and Environmental Safety, vol. 171, 2019, pp. 231-239.
Cui G, Ai S, Chen K, et al. Arbuscular mycorrhiza augments cadmium tolerance in soybean by altering accumulation and partitioning of nutrient elements, and related gene expression. Ecotoxicol Environ Saf. 2019;171:231-239.
Cui, G., Ai, S., Chen, K., & Wang, X. (2019). Arbuscular mycorrhiza augments cadmium tolerance in soybean by altering accumulation and partitioning of nutrient elements, and related gene expression. Ecotoxicology and Environmental Safety, 171, 231-239. https://doi.org/10.1016/j.ecoenv.2018.12.093
Cui G, et al. Arbuscular Mycorrhiza Augments Cadmium Tolerance in Soybean By Altering Accumulation and Partitioning of Nutrient Elements, and Related Gene Expression. Ecotoxicol Environ Saf. 2019 Apr 30;171:231-239. PubMed PMID: 30612010.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Arbuscular mycorrhiza augments cadmium tolerance in soybean by altering accumulation and partitioning of nutrient elements, and related gene expression. AU - Cui,Guangjuan, AU - Ai,Shaoying, AU - Chen,Kang, AU - Wang,Xiurong, Y1 - 2019/01/03/ PY - 2018/08/10/received PY - 2018/11/29/revised PY - 2018/12/27/accepted PY - 2019/1/7/pubmed PY - 2019/3/21/medline PY - 2019/1/7/entrez KW - Cd KW - Essential nutrient elements KW - Glycine max KW - Molecular mechanism KW - Rhizophagus irregularis KW - Translocation and distribution SP - 231 EP - 239 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 171 N2 - 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. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/30612010/Arbuscular_mycorrhiza_augments_cadmium_tolerance_in_soybean_by_altering_accumulation_and_partitioning_of_nutrient_elements_and_related_gene_expression_ DB - PRIME DP - Unbound Medicine ER -