Physico-chemical, biochemical and microbial properties of the rhizospheric soils of tree species used as supports for black pepper cultivation in the humid tropics

Nutrients, microbial community structure and functional gene abundance of rhizosphere and bulk soils of halophytes

“…Suaeda is a perennial, dicotyledonous with high biomass producing plant community and higher enzymatic activities can probably be ascribed to sufficient levels of substrates being available from the root exudates. Enzyme activities were markedly higher in rhizosphere compared to control soil but all plants were not affected enzyme activities to the same degree (Dinesh et al, 2010). Such differences in biochemical parameters between rhizopshere and bulk soil have been previously described in different plant communities (Caravaca et al, 2005;Dinesh et al, 2010;Cao et al, 2014).…”

“…Our results indicated that the rhizosphere soil induces the enzyme as a consequence of enhanced substrate and microbial activity level (Caravaca et al, 2005;Dinesh et al, 2010). This was clearly evident from the positive correlation (r = 0.52; p < 0.02) between organic carbon and b-glucosidase activity, which appears logical because enzymes are synthesized by soil microbes in response of substrate (Dinesh et al, 2010).…”

“…This was clearly evident from the positive correlation (r = 0.52; p < 0.02) between organic carbon and b-glucosidase activity, which appears logical because enzymes are synthesized by soil microbes in response of substrate (Dinesh et al, 2010).…”

Nitrogen transformation in the rhizospheres of two subalpine coniferous species under experimental warming

“…However, only limited effort has been made to link rhizosphere processes with soil processes, such as N cycling and nutrient availability (Dinesh et al, 2010). Consequently, tree roots and their rhizosphere interactions are at the centre of many ecosystem processes yet remain highly uncertain (Bader and Cheng, 2007;von Lutzow and Kogel-Knabner, 2009).…”

Soil labile organic carbon fractions in rhizosphere soil in citrus plantations in the Three Gorges Reservoir Area

“…The quality and quantity of root exudates are significantly affected by plant species and the age of the plant (Hamlen et al 1972). While some studies reported the rhizospheric soil physico-chemical, biochemical, and microbial properties of tree species (Steer and Harris 2000;Dinesh et al 2010), the changes in rhizosphere soil labile organic carbon fractions with tree age are largely unknown. Soil labile organic carbon fractions such as microbial biomass C (MBC), dissolved organic C (DOC), water-soluble carbohydrate (WSCh), and readily oxidizable C (ROC) can respond rapidly to changes in C supply and the physical environment compared with total soil organic carbon and are important in ensuring soil productivity and improving soil quality (Hu et al 1997;Jia et al 2014).…”