| Title | Distance-dependent varieties of microbial community structure and metabolic functions in the rhizosphere of Sedum alfredii Hance during phytoextraction of a cadmium-contaminated soil |
| Publication Type | Journal Article |
| Year of Publication | 2017 |
| Authors | Yang W.H, Zhang T.X, Lin S., Ni W.Z |
| Journal | Environmental Science and Pollution Research |
| Volume | 24 |
| Pagination | 14234-14248 |
| Date Published | Jun |
| Type of Article | Article |
| ISBN Number | 0944-1344 |
| Accession Number | WOS:000402748300030 |
| Keywords | cadmium, chemical-changes, different amendments, Environmental Sciences & Ecology, grassland ecosystems, heavy-metals, metal-polluted soils, method, microbial community, microresp (tm), MICRORESP(TM), mycorrhizal fungi, physiological, Phytoextraction, plfa, PROFILES, Rhizospheric, substrate utilization, thlaspi-caerulescens |
| Abstract | The recovery of microbial community and activities is crucial to the remediation of contaminated soils. Distancedependent variations ofmicrobial community composition and metabolic characteristics in the rhizospheric soil of hyperaccumulator during phytoextraction are poorly understood. A 12-month phytoextraction experiment with Sedum alfredii in a Cd-contaminated soil was conducted. A prestratified rhizobox was used for separating sub-layer rhizospheric (0-2, 2-4, 4-6, 6-8, 8-10 mm from the root mat)/bulk soils. Soil microbial structure and function were analyzed by phospholipid fatty acid (PLFA) and MicroResp T methods. The concentrations of total and specified PLFA biomarkers and the utilization rates for the 14 substrates (organic carbon) in the 0-2-mm sub-layer rhizospheric soil were significantly increased, as well as decreased with the increase in the distance from the root mat. Microbial structure measured by the ratios of different groups of PLFAs such as fungal/bacterial, monounsaturated/saturated, ratios of Gram-positive to Gram-negative (GP/GN) bacterial, and cyclopropyl/monoenoic precursors and 19:0 cyclo/18:1 omega 7c were significantly changed in the 0-2-mm soil. The PLFA contents and substrate utilization rates were negatively correlated with pH and total, acid-soluble, and reducible fractions of Cd, while positively correlated with labile carbon. The dynamics of microbial community were likely due to root exudates and Cd uptake by S. alfredii. This study revealed the stimulations and gradient changes of rhizosphere microbial community through phytoextraction, as reduced Cd concentration, pH, and increased labile carbons are due to the microbial community responses.
|
| Short Title | Environ. Sci. Pollut. Res.Environ. Sci. Pollut. Res. |
| Alternate Journal | Environ. Sci. Pollut. Res. |
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Yang, Wenhao Zhang, Taoxiang Lin, Sen Ni, Wuzhong
National Natural Science Foundation of China [41501345]; Natural Science Foundation of Fujian Province [2015J01155]; Foundation for Distinguished Young Scholars of Fujian Agriculture and Forestry University [XJQ201628]
We sincerely acknowledge the supports from the National Natural Science Foundation of China (No. 41501345), the Natural Science Foundation of Fujian Province (No. 2015J01155), and the Foundation for Distinguished Young Scholars of Fujian Agriculture and Forestry University (No. XJQ201628).
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Springer heidelberg
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