Identification and quantification of auxins in culture media of Azospirillum and Klebsiella and their effect on rice roots

El-Khawas, Hussein; Adachi, Katsuki

doi:10.1007/s003740050507

Cited by 106 publications

(48 citation statements)

References 8 publications

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“…Colour development was first visible within minutes and continued to increase in intensity for a period of 30 min. Similar research report has been documented on Klebsiella species for phytohormone production from rhizosphere of sugarcane, soyabean and rice [25,[26][27]. IAA production for K pneumoniae in present study was comparable to that reported by other authors for Klebsiella species K8 (171.9µg/ml) and K42 (11.12μg/ml) in chemically defined media [28].…”

Section: Indole Acetic Acid (Iaa) Productionsupporting

confidence: 91%

Klebsiella pneumoniae VRE36 as a PGPR isolated from Saccharum officinarum cultivar Co99004

Bhardwaj¹,

Shah²,

Joshi³

et al. 2017

J App Biol Biotech

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Klebsiella species known to exhibit important PGP traits like solubilization of phosphate, phytohormone production and good germination potential. In present study, based on the Phosphate solubilization and IAA production bacterial strain VRE36 was selected among the isolates collected from different sugarcane cultivar rhizosphere growing near Bardoli area for characterization and molecular identification through 16S rRNA gene sequence, which confirms the isolate as Klebsiella pneumoniae. The phosphate solubilization index of the isolate recorded was 3.9 and quantitative estimation reveals 17.4±1.78µg/ml release of phosphate in NBRIP broth. The high amount of IAA produced was 45.32±2.46µg/ml after 96 hour incubation at 37 °C. In seed germination assay with V radiate, C tetragonoloba and V unguiculata, treatments with bacteria were supported good plant height, dry weight and fresh weight when compared with controls. Maximum percentage of germination was recorded in V radiate (97.78%). The improved seedling parameters of the inoculated crop seeds indicated the potential of this isolate to be used in a bio-fertilizer formulation for sustainable production.

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Section: Indole Acetic Acid (Iaa) Productionsupporting

confidence: 91%

Klebsiella pneumoniae VRE36 as a PGPR isolated from Saccharum officinarum cultivar Co99004

Bhardwaj¹,

Shah²,

Joshi³

et al. 2017

J App Biol Biotech

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“…An increase in leaf area by the bacterial inoculation was observed in sorghum (Sarig et al, 1988). Inoculation of bacteria could also stimulate the root elongation and enlargement of root surface area as has been reported previously (Fulchieri et al, 1993;Khawas and Adachi, 1999). Along with the effects on leaf area expansion, it is certain that bacterial inoculation can stimulate the growth of vegetative organs, although the precise mechanism of the growth promotion by bacterial inoculation is still unknown.…”

Section: Discussionsupporting

confidence: 66%

Grain Yield and Related Physiological Characteristics of Rice Plants (Oryza sativa L.) Inoculated with Free-Living Rhizobacteria

Alam

Cui

Yamagishi

et al. 2001

Plant Production Science

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“…Inoculation with Azospirillum induces the proliferation of lateral roots and root hairs (Glick, 1995;El-Khawas & Adachi, 1999). A. brasilense can also, effectively bind to a variety of surfaces including plant stems, as well as carnation cuttings (Li et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Alternative rooting induction of semi-hardwood olive cuttings by several auxin-producing bacteria for organic agriculture systems

Montero‐Calasanz

Santamarı́a

Albareda

et al. 2013

Span. j. agric. res.

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Southern Spain is the largest olive oil producer region in the world. In recent years organic agriculture systems have grown exponentially so that new alternative systems to produce organic olive cuttings are needed. Several bacterial isolates, namely Pantoea sp. AG9, Chryseobacterium sp. AG13, Chryseobacterium sp. CT348, Pseudomonas sp. CT364 and Azospirillum brasilense Cd (ATCC 29729), have been used to induce rooting in olive semi-hardwood cuttings of Arbequina, Hojiblanca and Picual cultivars of olive (Olea europea L). The first four strains were previously selected as auxin-producing bacteria and by their ability to promote rooting in model plants. They have been classified on the basis of their 16S rDNA gene sequence. The known auxin producer A. brasilense Cd strain has been used as a reference. The inoculation of olive cuttings was performed in two different ways: (i) by dipping cuttings in a liquid bacterial culture or (ii) by immersing them in a paste made of solid bacterial inoculant and sterile water. Under nursery conditions all of the tested bacterial strains were able to induce the rooting of olive cuttings to a similar or greater extent than the control cuttings treated with indole-3-butyric acid (IBA). The olive cultivars responded differently depending on the bacterial strain and the inoculation method. The strain that consistently gave the best results was Pantoea sp. AG9, the only one of the tested bacterial strains to express the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase. The results are also discussed in terms of potential commercial interest and nursery feasibility performance of these strains.

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Identification and quantification of auxins in culture media of Azospirillum and Klebsiella and their effect on rice roots

Cited by 106 publications

References 8 publications

Klebsiella pneumoniae VRE36 as a PGPR isolated from Saccharum officinarum cultivar Co99004

Klebsiella pneumoniae VRE36 as a PGPR isolated from Saccharum officinarum cultivar Co99004

Grain Yield and Related Physiological Characteristics of Rice Plants (Oryza sativa L.) Inoculated with Free-Living Rhizobacteria

Alternative rooting induction of semi-hardwood olive cuttings by several auxin-producing bacteria for organic agriculture systems

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