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... BACKGROUND AND AIM: Entomopathogenic nematodes (EPN) use odor cues to locate and infect their insect hosts in the soil, making them an important tool in sustainable management of agricultural insect pests. However, very little information is available on the role of soil bacteria in mediating belowground interactions between plants, herbivores and the EPN. In this study, a maize-herbivore-entomopa ...
... BACKGROUND AND AIMS: Soil water repellency (SWR, i.e. the reduced affinity for water due to the presence of hydrophobic coatings on soil particles) has relevant hydrological implications on the rate of water infiltration, surface runoff, and overland flow. Here, we test how SWR varies along a 2490 m altitudinal gradient encompassing six ecosystems including Mediterranean, Temperate, and Alpine veg ...
... BACKGROUND AND AIMS: Information regarding the influence of endophyte-tall fescue symbiosis on soil hydraulic properties is rare. The hypothesis in this study was that the presence of Epichloë coenophialum in the tall fescue shoot may alter chemical and biological properties of rhizospheric soil and, as a consequence, the soil hydraulic properties and aggregate stability in texture-dependent ways. ...
... BACKGROUND AND AIMS: Iron plaque commonly forms on rice root surfaces under flooded conditions. However, little is known about the role of iron plaque in Se movement from rhizosphere to plant. A compartmented soil-quartz sand culture system was applied to investigate the effects of iron plaque on Se uptake by rice and document Se speciation dynamics in soil solution under flooded conditions. METHO ...
... BACKGROUND: Inoculation of plants to enhance yield of crops and performance of other plants is a century old, proven technology for rhizobia and a newer venue for plant growth-promoting bacteria and other plant symbionts. The two main aspects dominating the success of inoculation are the effectiveness of the bacterial isolate and the proper application technology. SCOPE: An assessment of practical ...
Nostoc; agricultural soils; chemical analysis; coatings; corn; dry matter accumulation; germination; scanning electron microscopy; soil erosion; soil structure; South Africa
Abstract:
... Many soils in South Africa have low nutrient supply, poor structural stability and are prone to soil erosion due to susceptibility to surface sealing and crusting. Two crusting soils from the Eastern Cape Province, South Africa were used to evaluate the effects of inoculation with a strain of Nostoc on soil structure, fertility and maize growth. The Nostoc suspension was uniformly applied over pot ...
Oumarou Malam Issa; Christian Défarge; Yves Le Bissonnais; Béatrice Marin; Odile Duval; Ary Bruand; Luigi Paolo D’Acqui; Sofie Nordenberg; Marcus Annerman
Nostoc; aggregate stability; coatings; humidity; inoculum; lighting; microstructure; nitrogen; polymers; soil aggregates; tropical soils; South Africa
Abstract:
... Cyanobacteria are widespread photosynthetic microorganisms among which some are able to fix atmospheric nitrogen. We investigated the impact of indigenous cyanobacteria strains (Nostoc) inoculation on physical characteristics of poorly aggregated soils from Guquka (Eastern Cape, South Africa). The soil aggregates (3–5 mm) were arranged into a layer of 10–20 mm thick, and sprayed with cyanobacteria ...
... EDTA-assisted phytoextraction of lead (Pb) has been developed, but concerns have arisen due to the possibility of leaching of both Pb and EDTA to ground water caused by uncontrolled release. We developed five types of controlled-release EDTA (polymer-coated EDTA) by coating the EDTA with a polyolefin polymer. A test of the release rate showed that the duration for the release of 75% of total EDTA ...
Burkholderia cepacia; Pseudomonas fluorescens; active ingredients; coatings; cotton; field experimentation; monitoring; pendimethalin; population size; prometryn; rhizosphere; seed dressings; seedlings; soil; soil bacteria; soil drenching; sowing; trifluralin; Arizona
Abstract:
... The potential impact of three widely used herbicides, pendimethalin, prometryn, and trifluralin, on populations of five plant disease suppressing bacterial isolates (three isolates of Pseudomonas fluorescens and two isolates of Burkholderia cepacia) in the rhizosphere of cotton seedlings was investigated. All isolates are efficient cotton root colonizers and each is capable of suppressing a plant ...