Microbial and hydrolase activity after release of low molecular weight organic compounds by a model root surface in a clayey and a sandy soil

Renella, Giancarlo; Landi, L.; Valori, F.; Nannipieri, Paolo

doi:10.1016/j.apsoil.2007.01.001

Cited by 73 publications

(35 citation statements)

References 33 publications

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“…In addition, rhizosphere microorganisms may strongly modify the fate of P through the release of exoenzymes such as e.g. phosphatases of bacterial or fungal origin (Courty et al 2010;George et al 2002;Hinsinger et al 2011;Koranda et al 2011;Renella et al 2007;Richardson and Hadobas 1997).…”

Section: Rhizodeposition and Rhizosphere Microorganismsmentioning

confidence: 99%

Acquisition of phosphorus and other poorly mobile nutrients by roots. Where do plant nutrition models fail?

et al. 2011

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Background In the context of increasing global food demand, ecological intensification of agroecosystems is required to increase nutrient use efficiency in plants while decreasing fertilizer inputs. Better exploration and exploitation of soil resources is a major issue for phosphorus, given that rock phosphate ores are finite resources, which are going to be exhausted in decades from now on. Scope We review the processes governing the acquisition by plants of poorly mobile nutrients in soils, with a particular focus on processes at the root-soil interface. Rhizosphere processes are poorly accounted for in most plant nutrition models. This lack largely explains why present-day models fail at predicting the actual uptake of poorly mobile nutrients such as phosphorus under low input conditions. A first section is dedicated to biophysical processes and the spatial/temporal development of the rhizosphere. A second section concentrates on biochemical/biogeochemical processes, while a third section addresses biological/ecological processes operating in the rhizosphere. Conclusions New routes for improving soil nutrient efficiency are addressed, with a particular focus on breeding and ecological engineering options. Better mimicking natural ecosystems and exploiting plant diversity appears as an appealing way forward, on this long and winding road towards ecological intensification of agroecosystems. (Résumé d'auteur

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Section: Rhizodeposition and Rhizosphere Microorganismsmentioning

confidence: 99%

Acquisition of phosphorus and other poorly mobile nutrients by roots. Where do plant nutrition models fail?

et al. 2011

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“…With respect to the soil enzyme activities, they are strongly dependent on the concentration and availability of root exudates (Renella et al 2007a). Both synthesis and persistence of enzymes have been quantified in studies based on the stimulation of microbial growth by adding easily degradable organic compounds to soil (Renella et al 2006b(Renella et al , 2007b, but the effects of flavonoids on soil enzyme activities have been poorly studied (Tomasi et al 2008).…”

Section: Concluding Remarks and Perspectivesmentioning

confidence: 99%

“…Renella et al (2006a) reported that different root exudates were mineralized to different extents and had different stimulatory effects on microbial growth and on hydrolase activities, mostly localized in the rhizosphere soil. As a consequence of the plant effect, enzymatic activities of the rhizosphere are often higher than those of the bulk soil, but it is difficult to discriminate between plant and microbial sources of enzymes in soil Renella et al 2006aRenella et al , 2007a.…”

Section: Impact On Soil Enzymesmentioning

confidence: 99%

Plant-borne flavonoids released into the rhizosphere: impact on soil bio-activities related to plant nutrition. A review

et al. 2012

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Plants produce and release in the surrounding soil, the so-called rhizosphere, a vast variety of secondary metabolites. Among them, flavonoids are the most studied, mainly for their role in the establishment of rhizobiumlegume symbiosis; on the other hand, some studies highlight that they are also important in the plant strategies to acquire nutrients from the soil, for example, by acting on its chemistry. The scope of this review is to give a quick overview on the types and amounts of plant-released flavonoids in order to focus on their effects on soil activities that in turn can influence nutrient availability and so plant mineral nutrition; emphasis is given to the different nutrient cycles, soil enzyme, and soil bacteria activities, and their influence on soil macrofauna and roots of other plants. Finally, the possible outcome of the climate change on these processes is discussed.

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“…Moreover, on day 1, increase in PT activity was reported in soil with the addition of tartaric acid. Renella et al (2007) have shown that the activity of phosphatase in the rhizosphere soil layer was generally stimulated by LMWOAs. The alkaline phosphomonoesterase activity was significantly stimulated by citric acid in both clay and sandy soils, whereas the acid phosphomonoesterase activity was significantly stimulated by citric acid in the clay soil and by citric acid and oxalic acid in the sandy soil.…”

Section: Resultsmentioning

confidence: 99%

Combined effect of low-molecular-weight organic acids and creosote on phosphatase activities in sandy soil

Telesiński

Płatkowski

Krzyśko–Łupicka

et al. 2018

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Abstract. This paper assesses the impact of creosote and low-molecular-weight organic acids (LMWOAs) on the activity of acid phosphomonoesterase, alkaline phosphomonoesterase, phosphotriesterase, and inorganic pyrophosphatase in soil. The experiment was carried out on loamy sand samples with organic carbon content of 8.71 g·kg -1 , with the following variable factors: dosages of creosote: 0, 0.5%, and 2.5%; type of LMWOAs: oxalic acid, tartaric acid, and citric acid in the amount of 50 mmol·kg -1 of soil; days of experiment: 1, 7, 14, 28, 56, 112. Obtained results showed that contamination with creosote caused decrease in the activity of soil phosphatases. The observed effect did not always increase with increase in the dosage of the pollutant. Among the assayed phosphatases, the biggest changes were noted in the activity of phosphomonoesterases. Application of LMWOAs to contaminated soil mainly effected the inhibition of phospha- tase, especially the activity of acid phosphomonoesterase. Comparison of the effects of LMWOAs showed that the citric acid was the least toxic to soil phosphatases.

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Microbial and hydrolase activity after release of low molecular weight organic compounds by a model root surface in a clayey and a sandy soil

Cited by 73 publications

References 33 publications

Acquisition of phosphorus and other poorly mobile nutrients by roots. Where do plant nutrition models fail?

Acquisition of phosphorus and other poorly mobile nutrients by roots. Where do plant nutrition models fail?

Plant-borne flavonoids released into the rhizosphere: impact on soil bio-activities related to plant nutrition. A review

Combined effect of low-molecular-weight organic acids and creosote on phosphatase activities in sandy soil

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