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Strain LXD30(T) was isolated from rhizosphere soil of a plant of the species Camptotheca acuminata Decne which is native to warm, humid stream banks in southern China. Analysis of the 16S rRNA gene sequence revealed that the Gram-negative, rod-shaped bacterium fell within the realm of the genus Rhizobium and was most closely related to Rhizobium huautlense SO2(T) (96.4% sequence similarity) and Rhizobium cellulosilyticum LMG 23642(T) (96.4%). The isolate grew optimally at pH7.0 and 25-28 degrees C in the presence of 0-1% (w/v) NaCl. Major fatty acids were C16:0 (17.5%) and summed feature 7 (C18:1omega7c/omega9t/omega12t, 58.3%). Unequivocally low 16S rRNA (<97%), recA (<92%) and atpD (<90%) gene sequence similarities to all existing species of the genus and phenotypic characteristics all suggested that strain LXD30(T) (=KCTC 22609(T)=CGMCC 1.8903(T)) represents a novel Rhizobium species, for which the name Rhizobium kunmingense sp. nov. is proposed.
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http://dx.doi.org/10.2323/jgam.56.143 | DOI Listing |
Pestic Biochem Physiol
November 2025
College of Resources and Environment, Northeast Agricultural University, Harbin 150030, Heilongjiang, PR China. Electronic address:
Fomesafen (FSA), a diphenyl ether herbicide, causes toxicity to non-target organisms and subsequent crops. Vermi-remediation is advocated as an effective remediation method, but there has been no research on the isolation and mechanism of FSA-degradation strains from earthworm gut. In this study, three ecotypes of earthworms- Eisenia foetida (epigeic), Metaphire guillelmi (anecic), and Aporrectodea caliginosa (endogenic), were used to investigate the degradation mechanism of FSA in soil-plant-earthworm systems for the first time.
View Article and Find Full Text PDFSci Total Environ
September 2025
Department of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea; KNU NGS Core Facility, Kyungpook National University, Daegu 41566, Republic of Korea; Microblance Inc., Daegu 41566, Republic of Korea. Electronic address:
Abandoned mines have created extensive idle areas contaminated with heavy metals (HMs). Conventional remediation methods are often costly, environmentally disruptive, and pose risks to human health. As a sustainable alternative, a biological approach utilizing metal-tolerant plant growth-promoting bacteria (mPGPBs) was employed to remediate HM-contaminated soils and assess their biological safety.
View Article and Find Full Text PDFFront Plant Sci
August 2025
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China.
Introduction: Wheat is one of the three major cereal crops in the world and is susceptible to the effects of drought stress. Rhizosphere microorganisms can affect plant growth by altering nutrient absorption and resistance to stress. Studying the plant-microbe interaction under drought stress to reveal the impact of soil microorganisms on plant growth in dry land has important scientific significance.
View Article and Find Full Text PDFInt Microbiol
September 2025
Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.
This study investigated the potential of native arbuscular mycorrhizal fungi (AMF) isolated from organic cassava fields as a biofertilizer, assessing their effects on cassava growth both alone and in combination with plant growth-promoting bacteria (PGPB). AMF spores were isolated from the rhizospheric soil of organic cassava field soils in northeastern Thailand and grouped into two consortia based on spore size: A45 and A75. Molecular identification revealed that both consortia were dominated by the genera Claroideoglomus and Entrophospora, with Paraglomus additionally present in the A45 consortium.
View Article and Find Full Text PDFBiology (Basel)
July 2025
Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China.
The cultivation of cowpea (), a vital vegetable crop, faces significant threats from spp.-induced root rot. In this study, three fungal pathogens ( HKFf, HKFi, and HKFo) were isolated from symptomatic cowpea plants, and we screened 90 rhizobacteria from healthy rhizospheres using six culture media.
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