Microbial producers of plant growth stimulators and their practical use: A review

Цавкелова, Е. А.; Klimova, S Iu; Чердынцева, Т. А.; Netrusov, A. I.

doi:10.1134/s0003683806020013

Cited by 373 publications

(213 citation statements)

References 73 publications

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“…27,33,42,43 The functional role of hormone synthesis by microorganisms is not fully understood. Even less is known about the influence exogenous phytohormones exert on bacterial growth and development or their impact on plant-microbe interactions.…”

Section: Discussionmentioning

confidence: 99%

“…There are several examples of plant-associated bacteria capable of degrading auxins. 33,52,53 The capacity of G. xylinus to utilize auxins as carbon source will be explored in future investigations.…”

Section: Discussionmentioning

confidence: 99%

“…While there have been many reports on the effect of bacterially produced phytohormone-like compounds on plants, [30][31][32][33][34][35] very few studies have focussed on the effect that plant hormones have on the growth and biofilm production of bacteria. Therefore, the purpose of the present study was to examine the effect that phytohormones have on the growth and development of Gluconacetobacter xylinus ATCC 53582 and in particular, to determine the effect that these hormones have on pellicle characteristics.…”

Section: Introductionmentioning

confidence: 99%

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The effect of phytohormones on the growth, cellulose production and pellicle properties of Gluconacetobacter xylinus ATCC 53582

Qureshi

Sohail

Latos

et al. 2013

Acetic Acid Bacteria

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Gluconacetobacter xylinus is a plant-associated bacterium best studied for its cellulose production. Bacterial cellulose is important in facilitating plant-microbe interactions but little is known about the effect that exogenous phytohormones have on bacterial cellulose synthesis or the growth of G. xylinus. We characterized the growth, development and effect on pellicle characteristics caused by exogenous indole-3-acetic acid (IAA), gibberellic acid (GA), abscisic acid (ABA) and zeatin (Z) over a range of concentrations (1 nM to 100 μM). These phytohormones are plant growth regulators known to be involved plant development including fruit ripening and stress tolerance. Each of these hormones stimulated G. xylinus growth and influenced its pellicle characteristics. Exogenous IAA had the greatest effect on G. xylinus pellicles. Growth in IAA produced thin pellicles with very little cellulose. In general, pellicle wet weight was inversely proportional to the bacterial cellulose yield when cultures were grown in the presence of ABA, suggesting ABA influenced pellicle density and hydration. The crystallinity index, CI (IR) of cellulose produced in the presence of each phytohormone over a variety of concentrations was determined by Fourier transform infrared spectroscopy. The observed effect on cellulose crystallinity was concentration and hormone dependent. GA caused the greatest alterations in crystallinity with the highest CI (IR)=0.94 at 1 μM and the lowest CI (IR)=0.47 at 500 nM. Endogenous production of hormones by G. xylinus was investigated by high performance liquid chromatography of extracts prepared from both cell pellets and culture supernatants. We found G. xylinus synthesized GA, ABA and Z but did not produce IAA.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effect of phytohormones on the growth, cellulose production and pellicle properties of Gluconacetobacter xylinus ATCC 53582

Qureshi

Sohail

Latos

et al. 2013

Acetic Acid Bacteria

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“…Similarly, increases in the other variables studied were recorded, although the only statistically significant differences (p<0.05) are the length and stem wet weight (Table 3) DISCUSSION Bacillus is one of the most studied genus due to the plant growth promoting capacity in crops of economic importance (Rojas et al, 2011;Hernández-Rodríguez et al, 2014;Myresiotis et al, 2014;Widnyana Ketut and Cokorda Javandira, 2016). These bacteria are not usually important producers of auxin, however, some strains with the capacity to produce between 16 and 55 µg/ml of IAA have been reported (Tsavkelova, 2006;Felici et al, 2008;Rojas et al, 2011). The genus Bacillus includes B. megaterium species and B. subtilis that can produce organic acids as primary mechanism of solubilization of phosphate, but may also act as phytases enzymes excreted into the culture medium (Fernandez et al, 2005).…”

Section: Effect Of Bacillus Subtilis Strain Gibi 200 On Tomato Cropmentioning

confidence: 99%

Bacillus effect on the germination and growth of tomato seedlings (Solanum lycopersicum L).

et al. 2017

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The capacity to solubilize phosphate and to produce indole compounds Indole Acetic Acid type, was evaluated in 15 strains isolated from castor bean lignocellulosic residues (Ricinus communis). To determine the solubilizing activity of phosphates a qualitative test by using Pikovskaya culture medium was employed and for the evaluation of the production of indole compounds (IAA) a Salkowsky colorimetric analysis technique was applied. Among the microorganisms tested, the Bacillus pumilus GIBI 206 demonstrated capacity to solubilize phosphates and Bacillus subtilis GIBI 200 showed of capacity to solubilize phosphates and to produce Indoleacetic Acid (IAA). To determine the effect of the Bacillus subtilis strain on germination and growth promotion, tomato seeds (Solanum lycopersicum 'Santa Clara') were inoculated; the inoculation of the seeds along with the microorganism revealed statistically significant differences, during the germination stage compared to the control treatment. Nevertheless, it revealed a positive influence on the development of tomato plants, originating a significant increase on the mass and length of its stem and root. The results of this research offer the possibility of using the Bacillus subtilis as a growth promoter in tomato seedlings and in the formulation of bio-products.

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“…The efficient IAA producing active strain was isolated from vermicompost. Several reports showed that Streptomyces species from many crop rhizosphere soils have this ability (El-Tarabilya and Sivasithamparam B., 2006;Tsavkelova et al, 2006;ElTarabilya 2008.) On enzymatic screening it was found that all the isolates except IISR Act6 produced enzyme amylase (Table 7).…”

Section: Resultsmentioning

confidence: 99%

Biocontrol and growth promotive potential of <i>Streptomyces</i> spp. in black pepper (<i>Piper nigrum</i> L.)

Bhai

Lijina

Prameela

et al. 2017

JBC

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Actinomycetes isolated from the rhizosphere of black pepper and from vermicompost were tested for their antagonistic effect against Phytophthora capsici and Radopholus similis, the causal agents of foot rot and slow decline diseases of black pepper. Based on in vitro evaluations, four isolates were shortlisted (IISR Act2, IISR Act5, IISR Act6, and IISR Act9) and subjected to in vivo evaluation for Phytophthora infection by challenge inoculation and also greenhouse evaluation for growth promotion in black pepper. Rooted plants of black pepper were raised in soil amended with Actinomycetes strains individually and in combinations in portray and were transplanted into earthenware pots containing potting mixture amended with respective actinomycetes keeping un-amended plants as control. Observations were recorded on growth parameters like plant height, root weight, shoot weight and root infection by nematodes. Besides, soil was also analyzed for pH, dehydrogenase activity, EC and NPK content to know the influence of actinomycetes on soil microflora as well as on nutrient status. The results showed that consortia are more effective than individual isolates. Consortia holding IISR Act5+IISR Act9 were found highly effective in enhancing all the growth parameters followed by IISR Act2+ IISR Act9 and IISR Act2 + IISR Act5. The dehydrogenase activity was found higher in these consortia showing the higher microbial metabolic activity. Root lesions were also negligible in these treatments. Being effective in growth promotion as well as antagonistic activity, the isolates were tested for plant growth promotion and biocontrol traits. Among the isolates, IISR Act9 was found highly efficient in IAA production (119µg/ml) when compared to IISR Act2 (36.25µg/ml) and IISR Act5 (32.4µg/ml). Hence based on the growth promotive and pathogen suppressive effect, the consortia of either IISR Act5+IISR Act9 , IISR Act2+IISR Act9 or IISR Act2+IISR Act5 can be effectively used in black pepper for growth promotion and biological control of foot rot and slow decline diseases. The potential actinomycetes were identified as Streptomyces spp. as per Bergey's manual and rpoB gene sequence similarity of which IISR Act2 is identified as Streptomyces sp., IISR Act9 as Streptomyces albus and IISR Act5 as Streptomyces sp.

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Microbial producers of plant growth stimulators and their practical use: A review

Cited by 373 publications

References 73 publications

The effect of phytohormones on the growth, cellulose production and pellicle properties of Gluconacetobacter xylinus ATCC 53582

The effect of phytohormones on the growth, cellulose production and pellicle properties of Gluconacetobacter xylinus ATCC 53582

Bacillus effect on the germination and growth of tomato seedlings (Solanum lycopersicum L).

Biocontrol and growth promotive potential of <i>Streptomyces</i> spp. in black pepper (<i>Piper nigrum</i> L.)

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