نتایج جستجو برای: sinorhizobium

تعداد نتایج: 1682  

ژورنال: :تولید محصولات زراعی و باغی 0
مجید طالبی بداف m talebi مسعود بهار m bahar قدرت اله سعیدی gh saeedi سید ابوالقاسم محمدی a mohamadi

به منظور تعیین پراکنش جغرافیایی سینوریزوبیوم های همزیست با یونجه در نواحی غرب و شمال غرب ایران، تعداد 950 جدایه از سینوریزوبیوم های همزیست با دو جمعیت یونجه داخلی (همدانی و نیک شهری) و یک جمعیت خارجی (کودی) در هشت خاک جمع آوری شده از استان های کردستان، کرمانشاه، آذربایجان شرقی و کردستان انتخاب شدند. شناسایی دقیق این جدایه ها به همراه 14 جدایه تولید کننده گره در یونجه زرد (melilotus officinalis)...

Journal: :Applied and environmental microbiology 2014
Hui Juan Guo En Tao Wang Xing Xing Zhang Qin Qin Li Yan Ming Zhang Chang Fu Tian Wen Xin Chen

In order to investigate the genetic differentiation of Sinorhizobium strains nodulating Glycine max and related microevolutionary mechanisms, three housekeeping genes (SMc00019, truA, and thrA) and 16 symbiosis-related genes on the chromosome (7 genes), pSymA (6 genes), and pSymB (3 genes) were analyzed. Five distinct species were identified among the test strains by calculating the average nuc...

2009
Reiner Rincón-Rosales Lourdes Lloret Edith Ponce Esperanza Martínez-Romero

Bacteria from nodules of the legume Acaciella angustissima native to the south of Mexico were characterized genetically and their nodulation and competitiveness were evaluated. Phylogenetic studies derived from rpoB gene sequences indicated that A. angustissima is nodulated by Sinorhizobium mexicanum, Rhizobium tropici, Mesorhizobium plurifarium and Agrobacterium tumefaciens and by bacteria rel...

اصغرزاده, احمد , حق نیا, غلامحسین , خاوازی, کاظم , کریمی, اسماعیل , لکزیان, امیر ,

  It is important to investigate the genetic diversity and evaluate symbiotic effectiveness of the indigenous rhizobial population. It helps understand the responses of indigenous isolates to different rhizobial inoculants. In spite of the importance of bacterial diversity, there are a few scientific reports about it in Iranian soils. Genetic diversity of 150 isolates of Sinorhizobium isolated ...

Journal: :FEMS microbiology letters 2003
Emanuele G Biondi Elena Pilli Elisa Giuntini Marina L Roumiantseva Euvgenij E Andronov Olga P Onichtchouk Oksana N Kurchak Boris V Simarov Nikolay I Dzyubenko Alessio Mengoni Marco Bazzicalupo

Sinorhizobium meliloti and Sinorhizobium medicae are two closely related species of the genus Sinorhizobium showing a similar host range, nodulating leguminous species of the genera Medicago, Melilotus and Trigonella, but their phylogenic relationship has not been elucidated yet. In this paper we report the application of three different molecular markers, (i) RFLP of nodD genes, (ii) 16S-23S r...

Journal: :Applied and environmental microbiology 2000
M Sánchez-Contreras J Lloret M Martín M Villacieros I Bonilla R Rivilla

A PCR identification method in which four primers that recognize homologous conserved regions in the Sinorhizobium meliloti genome are used was developed and tested. The regions used for identification were the nodbox 4 locus, which is located in one of the symbiotic megaplasmids, and the mucR gene, which is located in the chromosome. The new method was used to establish a collection of S. meli...

2013
Stefan Weidner Birgit Baumgarth Michael Göttfert Sebastian Jaenicke Alfred Pühler Susanne Schneiker-Bekel Javier Serrania Rafael Szczepanowski Anke Becker

Sinorhizobium meliloti Rm41 nodulates alfalfa plants, forming indeterminate type nodules. It is characterized by a strain-specific K-antigen able to replace exopolysaccharides in promotion of nodule invasion. We present the Rm41 genome, composed of one chromosome, the chromid pSymB, the megaplasmid pSymA, and the nonsymbiotic plasmid pRme41a.

Journal: :Journal of bacteriology 1999
L X Wang Y Wang B Pellock G C Walker

The production of succinoglycan by Sinorhizobium meliloti Rm1021 is required for successful nodule invasion by the bacterium of its host plant, alfalfa. Rm1021 produces succinoglycan, an acidic exopolysaccharide composed of an octasaccharide repeating unit modified with acetyl, succinyl, and pyruvyl moieties, in both low- and high-molecular-weight forms. Low-molecular-weight (LMW) succinoglycan...

Journal: :International journal of systematic and evolutionary microbiology 2002
En Tao Wang Zhi Yuan Tan Anne Willems Manuel Fernández-López Barbara Reinhold-Hurek Esperanza Martínez-Romero

Sinorhizobium morelense sp. nov. is described to designate a group of bacteria isolated from root nodules of Leucaena leucocephala. S. morelense shows 98% 16S rRNA gene sequence similarity to some Sinorhizobium species and to Ensifer adhaerens. This novel species is distinguished from other Sinorhizobium species and from E. adhaerens by DNA-DNA hybridization, 165 rRNA gene restriction fragments...

Journal: :Journal of bacteriology 2009
Tyler T Steele Christopher W Fowler Joel S Griffitts

The Sinorhizobium meliloti megaplasmid pSymA has previously been implicated in gluconate utilization. We report a locus on pSymA encoding a putative tripartite ATP-independent periplasmic (TRAP) transporter that is required for gluconate utilization. The expression of this locus is negatively regulated by a GntR family regulator encoded adjacent to the transporter operon.

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