Functional potential differences between and in response to manure amendment in a reclaimed soil.

Manure amendment generally bolsters soil organisms but not all bacteria equally. To understand why different taxa respond differently, we used shotgun metagenomic approaches to profile functional potentials and correlate them with taxon abundances. A soil originally unproductive was reclaimed using commercial manure and finally became productive.

sp. nov., isolated from cattail root soil from mine tailings.

A yellow-pigmented, Gram-stain-negative, aerobic, non-motile rod shaped, mesophilic bacterium, designated strain N7XX-4, was isolated from cattail root grown on the mine tailings of Phoenix mountain, Tongling city, Anhui Province (PR China). Analysis of the 16S rRNA gene sequence revealed that the strain represented a novel member of the family . The nearest phylogenetic neighbour was MSL-13 (97.

Using as an environmental-friendly alternative to for the aquaculture of Chinese mitten crab.

is widely used in Chinese mitten crab (CMC) rearing practice, but it is not a native aquatic plant and cannot endure high temperature. Thus, large mortality and water deterioration events could occur during high-temperature seasons. The aim of this study was to identify the use of local macrophytes in CMC rearing practice, including and .

Microbial community diversities and taxa abundances in soils along a seven-year gradient of potato monoculture using high throughput pyrosequencing approach.

Background: Previous studies have focused on linking soil community structure, diversity, or specific taxa to disturbances. Relatively little attention has been directed to crop monoculture soils, particularly potato monoculture. Information about microbial community changes over time between monoculture and non-monoculture treatments is lacking.

[Screening and identification of plant growth-promoting rhizobacteria].

Objective: The interaction between plant growth promoting rhizobacteria (PGPR) and plants can be unstable, PGPR with PGP activities may be well adapted to particular soil environment. Based on this, we isolated and identified PGPRs from different rhizosphere soils according to their multiple mechanisms.

Methods: Preliminary screening of PGPRs under the premises of PGPR may having the abilities of N2-fixing, phosphate and potassium solubilization, and resistance against six common pathogenic fungi as well as rhizosphere colonization.

[Action mechanisms of plant growth-promoting rhizobacteria (PGPR): a review].

Plants during their growth may suffer from many biotic and abiotic stresses, resulting in a decrease of biological production. They may also establish some mechanisms to resist or tolerate the stresses under the stimulation or induction by a variety of factors, among which, plant growth-promoting rhizobacteria (PGPR) is an important one. In this paper, the recently published papers related to this subject were reviewed, and two categories of the action mechanisms of PGPR, namely, induced systemic resistance (ISR) and induced systemic tolerance (IST), were elaborated.

[Humus composition and stable carbon isotope natural abundance in paddy soil under long-term fertilization].

Soil samples were collected from an experimental paddy field with long-term (26 years) fertilization in Taihu Lake region of Jiangsu Province to study the effects of different fertilization on the organic carbon distribution and stable carbon isotope natural abundance (delta 13C) in the soil profile, and on the humus composition. The results showed that long-term fertilization increased the organic carbon content in top soil significantly, and there was a significantly negative exponential correlation between soil organic carbon content and soil depth (P < 0.01).

Actinobacterial community structure in soils receiving long-term organic and inorganic amendments.

The impact of long-term organic and inorganic amendments on the actinobacterial community in soils was studied. Denaturing gradient gel electrophoresis patterns based on the V3 region of 16S rRNA suggested that there was no significant difference between the communities occurring in the different amendments. However, analysis of the clone libraries of the actinobacterial communities by the use of multiple statistical approaches showed that these communities were significantly different from each other.

Use of a green fluorescent protein-based reporter fusion for detection of nitric oxide produced by denitrifiers.

To determine if green fluorescent protein could be used as a reporter for detecting nitric oxide production, gfp was fused to nnrS from Rhodobacter sphaeroides 2.4.3.