Characterization of Rhizobium Isolates and their Potential PGPR Characteristics of different Rhizosphere Soils of Telangana Region

Manasa, K.; Reddy, R. Subhash; Triveni, S.; Kumar, Bhupendra; Priya, N. Gowri

doi:10.20546/ijcmas.2017.605.316

Cited by 20 publications

(11 citation statements)

References 6 publications

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“…The reference strain has also exhibited strong (+++) HCN production ability. The results of this study are in line with the findings of Manasa et al (2017) they studied HCN production in fifteen Rhizobium isolates, among those 53% isolates showed positive for HCN and siderophore production. Siderophore production and utilization in rhizobia is of particular interest due to the dominant role of iron in the N 2 fixation and assimilation process (Schwyn and Neiland, 1987).…”

Section: Functional Characterization Of Rhizobium Isolatessupporting

confidence: 89%

Influence of Plant Growth Promoting Rhizobium on Growth of Pigeon Pea [Cajanus cajan (L.) Millsp.]

Harshitha

Goudar

2021

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Background: Symbiotic nitrogen fixation plays a major role in the production of million tons of total biological nitrogen. The Rhizobium not only fixes the nitrogen but also produces plant growth promoting hormones. In this view, the present study was undertaken to characterize the native Rhizobium isolates for their functional properties and evaluate on pigeon pea for their plant growth promotional activities. Methods: The present investigation was carried out during the year 2018-19 at UAS, Dharwad. Five of the native isolates obtained from Northern district of Karnataka were subjected for functional characterization using standard methods. The isolates were also tested for their plant growth promotional activities.Result: The IAA production in the isolates was ranged from 20.50 to 22.85 mg IAA/ml of broth and GA production from 13.40 to 14.51 mg/25ml of broth. ACC deamination activity in the isolates was ranged from 57.50 to 75.5 nmoles of α-ketobutyrate/mg/h of broth. All the isolates exhibited their ability to solubilize P and Zn. Out of ten isolates, four isolates exhibited potential to inhibit mycelial growth of Fusarium oxysporum f. sp. udum and per cent inhibition was ranged from 48.75 to 73.75. All the isolates were found to be positive for siderophore and HCN production. The isolate AMVPR98 performed better with respect to all the growth parameters of pigeon pea. Molecular characterization of isolate AMVPR98 revealed 99% similarity with Rhizobium pusense strain AB3.

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Section: Functional Characterization Of Rhizobium Isolatessupporting

confidence: 89%

Influence of Plant Growth Promoting Rhizobium on Growth of Pigeon Pea [Cajanus cajan (L.) Millsp.]

Harshitha

Goudar

2021

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“…Efforts have also been applied to improve the efficiency of microorganisms already available and in the identification of new elite strains to be used as inoculants under unfavorable and stressful environmental conditions, such as areas frequently experiencing drought, soils with low nutrient availability or with salinity, among others (Benidire et al 2017; Koskey et al 2017; Youseif et al 2017). There is an increasing number of studies aiming to isolate, identify and evaluate the capacity of plant-growth promotion of bacteria with a variety of plant species, with potential to be transformed into new microbial inoculants in a near future (Yanni et al 2016; Koskey et al 2017; Manasa et al 2017; Muleta et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Microbial inoculants: reviewing the past, discussing the present and previewing an outstanding future for the use of beneficial bacteria in agriculture

2019

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More than one hundred years have passed since the development of the first microbial inoculant for plants. Nowadays, the use of microbial inoculants in agriculture is spread worldwide for different crops and carrying different microorganisms. In the last decades, impressive progress has been achieved in the production, commercialization and use of inoculants. Nowadays, farmers are more receptive to the use of inoculants mainly because high-quality products and multi-purpose elite strains are available at the market, improving yields at low cost in comparison to chemical fertilizers. In the context of a more sustainable agriculture, microbial inoculants also help to mitigate environmental impacts caused by agrochemicals. Challenges rely on the production of microbial inoculants for a broader range of crops, and the expansion of the inoculated area worldwide, in addition to the search for innovative microbial solutions in areas subjected to increasing episodes of environmental stresses. In this review, we explore the world market for inoculants, showing which bacteria are prominent as inoculants in different countries, and we discuss the main research strategies that might contribute to improve the use of microbial inoculants in agriculture.

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“…Production of hydrogen cyanide by the bacterial isolates followed the procedure of Manasa et al (2017).…”

Section: Production Of Hcnmentioning

confidence: 99%

Characterization of Rhizobium Isolates as Biocontrol Agents Against Fusarium Solani and Macrophomina Phaseolina

ABDEL-LATEIF¹,

EL-GHANY²

2023

SABRAOJBG

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This study recovered 15 Rhizobium and Bradyrhizobium isolates from nodules of different legume plants (Faba bean, Pea, Soybean, and Clover) grown in nine Egyptian governorates representing the delta region (Menoufia, Gharbia, Suez, Qalubia, Cairo, Sharkia, Behirah, Kafr El-sheikh, and Ismailia). The infectivity test proceeded with all isolates retaining and infecting their hosts, demonstrating that they are Rhizobium cultures. Molecular identification based on 16S rRNA gene sequencing revealed that the isolates belonged to two species of Rhizobium, namely Rhizobium leguminosarum (RL1, RL2, RL3, RL4, RL5, RL6, RL7, RL8, RL9, RL10, RL11, RL12, and RL13) and Bradyrhizobium japonicum (BJ1 and BJ2). Moreover, PCR based on specific primers was employed to detect nifH gene in the genomes of tested isolates. Most of the isolates exhibited sensitivity toward antibiotics, and were able to produce HCN. The isolates of RL4, RL6, RL9, and RL10 were positive for chitinase activity and exhibited clear zones ranging from weak to sturdy. The antagonism evaluation of Rhizobium isolates against Fusarium solani and Macrophomina phaseolina ensued under in vitro conditions. The isolates RL6 and RL9 of R. leguminosarum were the most effective, suppressing more than 50% growth of M. phaseolina. Similarly, the isolates RL4, RL6, RL9, and RL10 revealed the most effective and inhibited more than 50% growth of F. solani. Interestingly, the isolates RL6 and RL9, which exhibited high levels of suppression against M. phaseolina, also displayed high levels of suppression against F. solani.

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Characterization of Rhizobium Isolates and their Potential PGPR Characteristics of different Rhizosphere Soils of Telangana Region

Cited by 20 publications

References 6 publications

Influence of Plant Growth Promoting Rhizobium on Growth of Pigeon Pea [Cajanus cajan (L.) Millsp.]

Influence of Plant Growth Promoting Rhizobium on Growth of Pigeon Pea [Cajanus cajan (L.) Millsp.]

Microbial inoculants: reviewing the past, discussing the present and previewing an outstanding future for the use of beneficial bacteria in agriculture

Characterization of Rhizobium Isolates as Biocontrol Agents Against Fusarium Solani and Macrophomina Phaseolina

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