- Title
- Climate and edaphic factors drive soil enzyme activity dynamics and tolerance to Cd toxicity after rewetting of dry soil
- Creator
- Tan, Xiangping; He, Jinhong; Nie, Yanxia; Ni, Xiuling; Ye, Qing; Ma, Lei; Megharaj, Mallavarapu; He, Wenxiang; Shen, Weijun
- Relation
- Science of the Total Environment Vol. 855, Issue 10 January 2023, no. 158926
- Publisher Link
- http://dx.doi.org/10.1016/j.scitotenv.2022.158926
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2023
- Description
- The intense drying-rewetting cycle due to climate change can affect soil microbial community composition and function, resulting in long-term consequences for belowground carbon and nutrient dynamics. However, how climatic and edaphic factors influence the responses of enzymes to rewetting and their responses to additional perturbation (e.g., heavy metal pollution) after the drying-rewetting history are not well understood. In this study, we collected 18 surface soils from farmlands across various climate zones in China. We chose dehydrogenase (DHA) and alkaline phosphomonoesterase (ALP) as representative intracellular and extracellular enzymes, respectively, and investigated their tolerance to additional perturbation by adding metal ions (i.e., Cd2+) upon rewetting. In all soils, rewetting increased DHA activities but did not affect ALP activities compared to air-dried soils. Rewetting increased the tolerances of DHA and ALP to Cd stress, suggesting that the drying-rewetting history may reduce the susceptibility of soil enzymes to additional disturbance. The results demonstrate that differentiating enzymes based on their location in the soil will improve our ability to assess the stress response of microbial communities to drastic fluctuations in soil moisture, thereby better predicting the legacy of climate change on microbial function in soils contaminated with heavy metals.
- Subject
- drying-rewetting; dehydrogenase; alkaline phosphomonoesterase; resistance; soil property; heavy metal stress; SDG 13; SDG 17; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1478764
- Identifier
- uon:50223
- Identifier
- ISSN:0048-9697
- Language
- eng
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