Plant Growth-Promoting and Rhizosphere-Competent Acinetobacter rhizosphaerae Strain BIHB 723 from the Cold Deserts of the Himalayas

Gulati, Arvind; Vyas, Pratibha; Rahi, Praveen; Kasana, Ramesh Chand

doi:10.1007/s00284-008-9339-x

Cited by 131 publications

(71 citation statements)

References 25 publications

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“…Microbial IAA production plays a significant role in the host plant's growth. IAA production in microbial strains has been investigated by several researchers (Ahmad et al, 2008;Gulati et al, 2009;Jung et al, 2011). According to the present results, it is apparent that most of the isolated phosphorus solubilizing strains can be considered as efficient IAA producers.…”

Section: Resultsmentioning

confidence: 70%

Assessment of Plant Growth Promoting Activities of Phosphorus Solubilizing Bacteria

Walpola¹,

Song²,

Yoon³

2012

Korean Journal of Soil Science and Fertilizer

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Plant growth promoting traits like production of indoleacetic acid (IAA), ammonia, hydrogen cyanide (HCN), siderophore, and like the enzyme activities of catalase, ACC deaminase, cellulase, chitinase and protease were assayed in vitro for twenty one phosphorus solubilizing bacteria isolated from soil isolates. Except SPP-5 and SPP-15 strains, all the other isolated strains produced IAA in various amounts of 10 to 23 µg ml -1 . All strains showed positive response for ammonia production and ACC deaminase activity implying that they are capable of growing in a N-free basal medium. Catalase activity was found to be superior in SPP-2, SPP-7, SPP-12 and SPP-17 compared to the other strains tested. HCN production was detected by 15 strains and among them SPP-9, SPP-15, SAph-11, and SAph-24 were found to be strong HCN producers. Except the isolates SPP-10, SPP-12, SPP-13 and SPP-14, all the other isolates produced more than 80% siderophore units. None of the strains showed cellulose and chitinase activity. SAph-8, SAPh-11, SAPh-24 and SPP-15 strains showed 35.84, 50.33, 56.64 and 34.78 U/ml protease activities, respectively. SPP-1, SPP-2, SPP-3, SPP-11, SPP-17, SPP-18, SAph-11 and SAph-24 strains showed positive response for all the tested plant growth promotion traits except cell wall degrading enzyme activities. According to the results, all the tested phosphorus solubilizing isolates could exhibit more than three or four plant growth promoting traits, which may promote plant growth directly or indirectly or synergistically. Therefore, these phosphorus solubilizing strains could be employed as bio-inoculants for agriculture soils.

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Section: Resultsmentioning

confidence: 70%

Assessment of Plant Growth Promoting Activities of Phosphorus Solubilizing Bacteria

Walpola¹,

Song²,

Yoon³

2012

Korean Journal of Soil Science and Fertilizer

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“…SW5 showed the highest production of IAA among many isolates, 1.37 ± 0.07 mg/mg protein at 2 days of incubation in BHB medium without the addition of IAA precursor tryptophan, and its concentration in the culture was 118.1 mg/L. This is much higher than 15 µg/ml of IAA at 2 days incubation by A. rhizosphaerae BIHB723 in 0.1% tryptophan added nutrient broth (Gulati et al, 2009), and 7.9-8.2 µg/ml of IAA by other strains of Acinetobacter spp. (Indiragandhi et al, 2008).…”

Section: Resultsmentioning

confidence: 86%

“…SW5 Acinetobacter spp. are widely distributed in soil and water, and some of them have been reported to enhance the growth of many plants (Indiragandhi et al, 2008;Gulati et al, 2009;Shi et al, 2011). In this study Acinetobacter sp.…”

Section: Resultsmentioning

confidence: 99%

“…(Huddedar et al, 2002;Chaiharn et al, 2008;Rokhbakhsh-Zamin et al, 2011). Although many species of Acinetobacter are reported as PGPR (Indiragandhi et al, 2008;Gulati et al, 2009;Kang et al, 2009;Shi et al, 2011), this SW5 strain showed a high plant growth promoting capability. SW5 strain has a 97.875% of sequence homology of 16S rRNA gene compared with the type strain A. guillouiae ATCC 11171 T reported recently by Nemec et al (2010), and some general characteristics of SW5 strain were coincided with those of other Acinetobacter spp.…”

Section: Resultsmentioning

confidence: 99%

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Interactions between Indole-3-acetic Acid Producing Acinetobacter sp. SW5 and Growth of Tomato Plant

Kwon¹,

Song²

2014

The Korean Journal of Microbiology

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“…The specific genera that inhabit the rhizosphere and roots that have been shown to promote plant growth include Arthrobacter, Azoarcus, Azospirillum, Bacillus, Burkholderia, Enterobacter, Gluconacetobacter, Herbaspirillum, Klebsiella, Paenibacillus, Pseudomonas and Serratia (Spaepen et al 2009). The mechanisms by which these bacteria promote plant growth commonly include phosphate solubilization, production of growth regulators and biological nitrogen fixation (Gulati et al 2009;Dobbelaere et al 2003;Döbereiner and Pedrosa 1987). Although many studies have been conducted on these plant growth-promoting microorganisms, broad applications of these microbes in agriculture are still in the early stages of development.…”

Section: Introductionmentioning

confidence: 99%

Diversity and capacity to promote maize growth of bacteria isolated from the Amazon region

Silva¹,

Perin

Gomes

et al. 2016

Acta Amaz.

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Maize plants can establish beneficial associations with plant growth-promoting bacteria. However, few studies have been conducted on the characterization and inoculation of these bacteria in the Amazon region. This study aimed to characterize endophytic bacteria isolated from maize in the Amazon region and to assess their capacity to promote plant growth. Fifty-five bacterial isolates were obtained from maize grown in two types of ecosystems, i.e., a cerrado (savanna) and a forest area. The isolates were characterized by the presence of the nifH gene, their ability to synthesize indole-3-acetic acid (IAA) and solubilize calcium phosphate (CaHPO 4 ), and 16S rRNA partial gene sequencing. Twenty-four bacteria contained the nifH gene, of which seven were isolated from maize plants cultivated in a cerrado area and seventeen from a forest area. Fourteen samples showed the capacity to synthesize IAA and only four solubilized calcium phosphate. The following genera were found among these isolates: Pseudomonas; Acinetobacter; Enterobacter; Pantoea; Burkholderia and Bacillus. In addition, eight isolates with plant growth-promoting capacity were selected for a glasshouse experiment involving the inoculation of two maize genotypes (a hybrid and a variety) grown in pots containing soil. Inoculation promoted the development of the maize plants but no significant interaction between maize cultivar and bacterial inoculation was found. A high diversity of endophytic bacteria is present in the Amazon region and these bacteria have potential to promote the development of maize plants. KEYWORDS: Biological nitrogen fixation, Zea mays L., 16S rRNA. Diversidade e capacidade de promoção de crescimento de milho de bactérias isoladas da região Amazônica RESUMOPlantas de milho podem estabelecer associações benéficas com bactérias promotoras do crescimento vegetal. No entanto, poucos estudos de caracterização e inoculação com essas bactérias foram realizados na região Amazônica. O objetivo deste estudo foi caracterizar bactérias endofíticas isoladas de milho na região Amazônica e avaliar sua capacidade de promover o crescimento. Cinquenta e cinco isolados bacterianos foram obtidos de plantas de milho cultivadas em diferentes tipos de ecossistemas, cerrado (savana) e área de floresta. Estes foram caracterizados pela presença do gene nifH, capacidade de sintetizar ácido indol-3-acético (AIA), solubilizar fosfato de cálcio (CaHPO 4 ) e sequenciamento parcial do gene 16S rRNA. Vinte e quatro bactérias apresentaram o gene nifH. Destas, sete são oriundas de plantas cultivadas em uma área de cerrado e 17 em área de floresta. Quatorze bactérias demonstraram a capacidade de solubilizar AIA e quatro de solubilizar fosfato de cálcio. Entre estas bactérias, foram encontrados os seguintes gêneros: Pseudomonas; Acinetobacter; Enterobacter; Pantoea; Burkholderia e Bacillus. Oito isolados com capacidade de promoção do crescimento vegetal foram selecionados para experimento em casa de vegetação com a inoculação em dois diferentes genótipos de mi...

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Plant Growth-Promoting and Rhizosphere-Competent Acinetobacter rhizosphaerae Strain BIHB 723 from the Cold Deserts of the Himalayas

Cited by 131 publications

References 25 publications

Assessment of Plant Growth Promoting Activities of Phosphorus Solubilizing Bacteria

Assessment of Plant Growth Promoting Activities of Phosphorus Solubilizing Bacteria

Interactions between Indole-3-acetic Acid Producing Acinetobacter sp. SW5 and Growth of Tomato Plant

Diversity and capacity to promote maize growth of bacteria isolated from the Amazon region

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