Molecular Genetics of Rhizosphere and Plant-Root Colonization

Vanbleu, Els; Vanderleyden, Jos

doi:10.1007/1-4020-3546-2_5

Cited by 5 publications

(2 citation statements)

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“…of the in situ soil (every 10 cm depth corresponds to the same layer). Additionally, outlets were strategically installed at 10 cm intervals along the side of the column to facilitate the study [43][44][45].…”

Section: Soil Column Experimentsmentioning

confidence: 99%

“…Mesophilic microbes, such as bacteria and coliforms, exhibit optimal growth within specific temperature ranges. Coliforms, which are commonly found in the intestines of animals and humans, demonstrate optimal growth at temperatures ranging from 30 • C to 40 • C, with the most rapid reproduction occurring at 37 • C. The quantity, metabolism, and activity are subject to change when the temperatures are not conducive to their survival [44][45][46][47][48]. This is consistent with our finding that TBC and TEC values are lower below 30 • C. In summer, with high temperatures, the average groundwater TEC values are approximately seven times higher than in other seasons.…”

Section: The Temperature and Porosity Effects On Groundwater Qualitymentioning

confidence: 99%

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Analysis of Pathogen-Microbiota Indicator Responses in Surface Karst Springs under Various Conditions in a Rocky Desertification Area: A Case Study of the Xiaojiang Watershed in Yunnan

Sun,

Wang,

Ning

et al. 2024

Applied Sciences

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The Xiaojiang watershed in Luxi, Yunnan, is a typical rocky desertification area, in which karst groundwater pollution is severe and water resources are scarce. This article takes the watershed as an example and investigates the response mechanisms of surface karst spring water quality to agricultural pollution in rocky desertification areas. Specifically, the study was conducted as follows: (I) A total of 108 water samples from 54 sources were collected during the dry and wet seasons for analysis. (i) Principal component and correlation analyses identified the main pollution indicators in the soil surface karst zone of the area, including total bacterial count, total coliforms, COD, pH, and redox potential. (ii) It was also discovered that surface soil, impacted by agricultural activities, directly contributes to groundwater pollution in the soil surface karst zone. (II) Local soil was used to prepare soil columns under various conditions for simulation. The findings indicate: (i) Temperature significantly affects the surface karst springs, with higher temperatures leading to more pronounced water quality responses, increased enrichment of pathogen-microbiota indicators, and degraded water quality. (ii) Soil porosity substantially influences the water quality of surface karst springs. Increased porosity results in looser soil, more oxidizing conditions in the storage matrix, reduced pathogen-microbiota development, and consequently, less water pollution. This study offers theoretical and technical references for evaluating, monitoring, and issuing early warnings for pathogenic bacteria-microbiota pollution in groundwater in rocky desertification areas.

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Section: Soil Column Experimentsmentioning

confidence: 99%