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Cultivar-specific response of bacterial community to cadmium contamination in the rhizosphere of rice (Oryza sativa L.).
Environ Pollut. 2018 Oct; 241:63-73.EP

Abstract

Cadmium accumulation in rice grains is highly dependent on its bioavailability that affected by various physicochemical properties and microbiological processes of soil. The rhizospheric bacterial communities of rice grown in contaminated soils by means of rice cultivars highly or weakly accumulating Cd in grains (HA and LA, respectively) were investigated. HA roots absorbed 7.26- and 2.25-fold more Cd than did LA roots at low (0.44 mg kg-1) and high (6.66 mg kg-1) soil Cd levels, respectively. Regardless of Cd levels, Cd bioavailability in the rhizosphere of HA was significantly higher than that of LA. Planting of rice and elevated Cd levels both significantly decreased bacterial α-diversity and altered bacterial community structure, with noticeable differences between the rice cultivars. Taxa specifically enriched in the HA rhizosphere (phyla Bacteroidetes, Firmicutes, and Deltaproteobacteria) can directly or indirectly participate in metal activation, whereas the LA rhizosphere was highly colonized by plant growth-promoting taxa (phyla Alphaproteobacteria and Gammaproteobacteria). The results indicate a potential association of Cd uptake and accumulation with rhizosphere bacteria in rice grown on a contaminated soil, thus providing baseline data and a new perspective on the maintenance of rice security.

Authors+Show Affiliations

MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; School of Marine Sciences, Ningbo University, Ningbo 315211, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.School of Marine Sciences, Ningbo University, Ningbo 315211, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.MOE Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China. Electronic address: tiansk@zju.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29800928

Citation

Hou, Dandi, et al. "Cultivar-specific Response of Bacterial Community to Cadmium Contamination in the Rhizosphere of Rice (Oryza Sativa L.)." Environmental Pollution (Barking, Essex : 1987), vol. 241, 2018, pp. 63-73.
Hou D, Wang R, Gao X, et al. Cultivar-specific response of bacterial community to cadmium contamination in the rhizosphere of rice (Oryza sativa L.). Environ Pollut. 2018;241:63-73.
Hou, D., Wang, R., Gao, X., Wang, K., Lin, Z., Ge, J., Liu, T., Wei, S., Chen, W., Xie, R., Yang, X., Lu, L., & Tian, S. (2018). Cultivar-specific response of bacterial community to cadmium contamination in the rhizosphere of rice (Oryza sativa L.). Environmental Pollution (Barking, Essex : 1987), 241, 63-73. https://doi.org/10.1016/j.envpol.2018.04.121
Hou D, et al. Cultivar-specific Response of Bacterial Community to Cadmium Contamination in the Rhizosphere of Rice (Oryza Sativa L.). Environ Pollut. 2018;241:63-73. PubMed PMID: 29800928.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cultivar-specific response of bacterial community to cadmium contamination in the rhizosphere of rice (Oryza sativa L.). AU - Hou,Dandi, AU - Wang,Runze, AU - Gao,Xiaoyu, AU - Wang,Kai, AU - Lin,Zhi, AU - Ge,Jun, AU - Liu,Ting, AU - Wei,Shuai, AU - Chen,Weikang, AU - Xie,Ruohan, AU - Yang,Xiaoe, AU - Lu,Lingli, AU - Tian,Shengke, Y1 - 2018/05/23/ PY - 2018/01/15/received PY - 2018/04/23/revised PY - 2018/04/25/accepted PY - 2018/5/26/pubmed PY - 2018/9/27/medline PY - 2018/5/26/entrez KW - Bacterial community KW - Cadmium KW - Proteobacteria KW - Rhizosphere KW - Rice cultivar SP - 63 EP - 73 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 241 N2 - Cadmium accumulation in rice grains is highly dependent on its bioavailability that affected by various physicochemical properties and microbiological processes of soil. The rhizospheric bacterial communities of rice grown in contaminated soils by means of rice cultivars highly or weakly accumulating Cd in grains (HA and LA, respectively) were investigated. HA roots absorbed 7.26- and 2.25-fold more Cd than did LA roots at low (0.44 mg kg-1) and high (6.66 mg kg-1) soil Cd levels, respectively. Regardless of Cd levels, Cd bioavailability in the rhizosphere of HA was significantly higher than that of LA. Planting of rice and elevated Cd levels both significantly decreased bacterial α-diversity and altered bacterial community structure, with noticeable differences between the rice cultivars. Taxa specifically enriched in the HA rhizosphere (phyla Bacteroidetes, Firmicutes, and Deltaproteobacteria) can directly or indirectly participate in metal activation, whereas the LA rhizosphere was highly colonized by plant growth-promoting taxa (phyla Alphaproteobacteria and Gammaproteobacteria). The results indicate a potential association of Cd uptake and accumulation with rhizosphere bacteria in rice grown on a contaminated soil, thus providing baseline data and a new perspective on the maintenance of rice security. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/29800928/Cultivar_specific_response_of_bacterial_community_to_cadmium_contamination_in_the_rhizosphere_of_rice__Oryza_sativa_L___ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(18)30193-3 DB - PRIME DP - Unbound Medicine ER -