Λεπτομέρειες βιβλιογραφικής εγγραφής
| Τίτλος: |
Response of soil microbial activities and microbial community structure to vanadium stress. |
| Συγγραφείς: |
Xiao, Xi-Yuan1, Wang, Ming-Wei1, Zhu, Hui-Wen1, Guo, Zhao-Hui1 zhguo@csu.edu.cn, Han, Xiao-Qing1, Zeng, Peng1 |
| Πηγή: |
Ecotoxicology & Environmental Safety. Aug2017, Vol. 142, p200-206. 7p. |
| Θεματικοί όροι: |
Soil microbial ecology, Vanadium compounds, Urease genetics, Polymerase chain reaction methodology, Denaturing gradient gel electrophoresis, Standards |
| Περίληψη: |
High levels of vanadium (V) have long-term, hazardous impacts on soil ecosystems and biological processes. In the present study, the effects of V on soil enzymatic activities, basal respiration (BR), microbial biomass carbon (MBC), and the microbial community structure were investigated through 12-week greenhouse incubation experiments. The results showed that V content affected soil dehydrogenase activity (DHA), BR, and MBC, while urease activity (UA) was less sensitive to V stress. The average median effective concentration (EC 50 ) thresholds of V were predicted using a log-logistic dose-response model, and they were 362 mg V/kg soil for BR and 417 mg V/kg soil for DHA. BR and DHA were more sensitive to V addition and could be used as biological indicators for soil V pollution. According to a polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) analysis, the structural diversity of the microbial community decreased for soil V contents ranged between 254 and 1104 mg/kg after 1 week of incubation. As the incubation time increased, the diversity of the soil microbial community structure increased for V contents ranged between 354 and 1104 mg/kg, indicating that some new V-tolerant bacterial species might have replicated under these conditions. [ABSTRACT FROM AUTHOR] |
| Βάση Δεδομένων: |
Supplemental Index |