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- Title
Impact of Elevated O<sub>3</sub> on Soil Microbial Community Function Under Wheat Crop.
- Authors
Chen, Zhan; Wang, Xiaoke; Feng, Zhaozhong; Xiao, Qin; Duan, Xiaonan
- Abstract
This study was initiated to explore the effects of ozone (O3) exposure on potted wheat roots and soil microbial community function. Three treatments were performed: (1) Air with daily averaged O3 concentration of 4–10 ppb (control situation, CK), (2) Air plus 8 h averaged O3 concentration of 76.1 ppb (O3-1), and (3) Air plus 8 h averaged O3 concentration of 118.8 ppb (O3-2). In treatments with elevated O3 concentration (O3-1 and O3-2), the root and shoot biomass were reduced by 25% and 18%, respectively, compared to the control treatment (CK). On the other hand, root activity was significantly reduced by 58% and 90.8% in the O3-1 and O3-2 treatments, respectively, compared to CK. The soil microbial biomass was significantly reduced only in the highest O3 concentration (O3-2 treatment) in the rhizosphere soil. Soil microbial community composition was assessed under O3 stress based on the changes in the sole carbon source utilization profiles of soil microbial communities using the Biolog™ system. Principal component analysis showed that there was significant discrimination in the sole-carbon source utilization pattern of soil microbial communities among the O3 treatments in rhizosphere soil; however, there was none in the bulk soil. In rhizosphere soil, the functional richness of the soil microbial community was reduced by 27% and 38% in O3-1 and O3-2 treatments, respectively, compared to CK. O3-2 treatment remarkably decreased the Shannon diversity index of soil microbial community function in rhizosphere soil, but the O3-1 treatment did not. In the dominant microorganisms using carbon sources of carbohydrates and amino acids groups were significantly reduced by an elevated O3 concentration in the rhizosphere soil. Our study shows that...
- Subjects
EFFECT of ozone on plants; EXPERIMENTAL botany; WHEAT; PLANT roots; SOIL microbiology; SCIENTIFIC method; PRINCIPAL components analysis; PLANT growth-promoting rhizobacteria; MICROBIAL ecology
- Publication
Water, Air & Soil Pollution, 2009, Vol 198, Issue 1-4, p189
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-008-9838-1