Effects of Heavy Metals on Phosphatase Enzyme Activity and Indole-3-Acetic Acid (IAA) Production of Phosphate Solubilizing Bacteria

2021 ◽  
pp. 1-10
Author(s):  
Lalmuankimi Khiangte ◽  
Ralte Lalfakzuala
Keyword(s):  
Heavy Metals ◽  
Enzyme Activity ◽  
Acetic Acid ◽  
Phosphate Solubilizing Bacteria ◽  
Iaa Production ◽  
Phosphate Solubilizing ◽  
Indole 3 Acetic Acid ◽  
Phosphatase Enzyme

scholarly journals Pseudomonas plecoglossicida as a novel bacterium for phosphate solubilizing and indole-3-acetic acid-producing from soybean rhizospheric soils of East Java, Indonesia

2020 ◽  
Vol 21 (2) ◽  
Author(s):  
Meli Astriani ◽  
SITI ZUBAIDAH ◽  
ABDUL LATIEF ABADI ◽  
ENDANG SUARSINI
Keyword(s):  
Acetic Acid ◽  
Molecular Identification ◽  
Phosphate Solubilizing Bacteria ◽  
Chemical Fertilizers ◽  
Iaa Production ◽  
Novel Bacterium ◽  
Pseudomonas Plecoglossicida ◽  
Phosphate Solubilizing ◽  
Solubilizing Activity ◽  
Indole 3 Acetic Acid

Abstract. Astriani M, Zubaidah S, Abadi AL, Suarsini E. 2020. Pseudomonas plecoglossicida as a novel bacterium for phosphate solubilizing and indole-3-acetic acid-producing from soybean rhizospheric soils of East Java, Indonesia. Biodiversitas 21: 578-586. The use of synthetic fertilizers to grow soybean (Glycine max (L.) Merrill) in a long time, can increase the risk of environmental damage. Therefore, the current study aimed to find phosphate solubilizing bacteria that can produce indole-3-acetic acid (IAA) hormone to minimize the use of chemical fertilizers. Superior isolates selected through characterization of phosphate solubilization activity on Pikovskaya medium, screening of IAA producing bacteria, quantitative estimation of phosphate solubilizing activity using a spectrophotometer, hypersensitivity assay, antagonist within isolate assay, and molecular identification of selected bacterial isolates using 16S rRNA sequencing with primer forward 63f and primer reverse 1387r. Among the isolated bacteria, isolate Arj8 showed the highest phosphate solubilizing activity and IAA production. Molecular identification indicated that isolate Arj8 shared 100% similarity with Pseudomonas plecoglossicida. The highest phosphate solubilizing activity (75.39 mg/L) and IAA production (38.89 ppm) recorded on day-3. Multiple potentialities of P. plecoglossicida as phosphate solubilizing and IAA producing bacterium are a novel finding in the development of bioinoculants as bio-fertilizers that can reduce dependency on synthetic chemical fertilizers.

scholarly journals Volatile 1-octanol of tea (Camellia sinensis L.) fuels cell division and indole-3-acetic acid production in phylloplane isolate Pseudomonas sp. NEEL19

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Poovarasan Neelakandan ◽  
Chiu-Chung Young ◽  
Asif Hameed ◽  
Yu-Ning Wang ◽  
Kui-Nuo Chen ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Cell Division ◽  
Petri Dish ◽  
Gas Chromatography Mass Spectrometry ◽  
Dependent Manner ◽  
Tea Leaves ◽  
Acetic Acid Production ◽  
Iaa Production ◽  
Solvent Tolerant ◽  
Indole 3 Acetic Acid

AbstractTea leaves possess numerous volatile organic compounds (VOC) that contribute to tea’s characteristic aroma. Some components of tea VOC were known to exhibit antimicrobial activity; however, their impact on bacteria remains elusive. Here, we showed that the VOC of fresh aqueous tea leaf extract, recovered through hydrodistillation, promoted cell division and tryptophan-dependent indole-3-acetic acid (IAA) production in Pseudomonas sp. NEEL19, a solvent-tolerant isolate of the tea phylloplane. 1-octanol was identified as one of the responsible volatiles stimulating cell division, metabolic change, swimming motility, putative pili/nanowire formation and IAA production, through gas chromatography-mass spectrometry, microscopy and partition petri dish culture analyses. The bacterial metabolic responses including IAA production increased under 1-octanol vapor in a dose-dependent manner, whereas direct-contact in liquid culture failed to elicit such response. Thus, volatile 1-octanol emitting from tea leaves is a potential modulator of cell division, colonization and phytohormone production in NEEL19, possibly influencing the tea aroma.

Characterization of the indole-3-acetic acid (IAA) biosynthetic pathway in an epiphytic strain of Erwinia herbicola and IAA production in vitro

1996 ◽  
Vol 42 (6) ◽  
pp. 586-592 ◽  
Author(s):  
M. Brandi ◽  
E. M. Clark ◽  
S. E. Lindow
Keyword(s):  
Acetic Acid ◽  
Pseudomonas Syringae ◽  
Pyruvic Acid ◽  
Enzyme Assays ◽  
Erwinia Herbicola ◽  
Iaa Production ◽  
Acid Pathway ◽  
Culture Supernatants ◽  
Indole 3 Acetic Acid

An epiphytic strain of Erwinia herbicola (strain 299R) synthesized indole-3-acetic acid (IAA) from indole-3-pyruvic acid and indole-3-acetaldehyde, but not from indole-3-acetamide and other intermediates of various IAA biosynthetic pathways in enzyme assays. TLC, HPLC, and GC–MS analyses revealed the presence of indole-3-pyruvic acid, indole-3-ethanol, and IAA in culture supernatants of strain 299R. Indole-3-acetaldehyde was detected in enzyme assays. Furthermore, strain 299R genomic DNA shared no homology with the iaaM and iaaH genes from Pseudomonas syringae pv. savastanoi, even in Southern hybridizations performed under low-stringency conditions. These observations strongly suggest that unlike gall-forming bacteria which can synthesize IAA by indole-3-acetamide, the indole-3-pyruvic acid pathway is the primary route for IAA biosynthesis in this plant-associated strain. IAA synthesis in tryptophan-supplemented cultures of strain 299R was over 10-fold higher under nitrogen-limiting conditions, indicating a possible role for IAA production by bacterial epiphytes in the acquisition of nutrients during growth in their natural habitat.Key words: indole-3-acetic acid, Erwinia, tryptophan, indole-3-pyruvic acid, nitrogen.

A Prototype Model for Indole-3-Acetic Acid (IAA) Production by Azospirillum brasilense SP245

2004 ◽  
Vol 37 (9) ◽  
pp. 493-498 ◽  
Author(s):  
Ilse Y. Smets ◽  
Kristel Bernaerts ◽  
Astrid Cappuyns ◽  
Ositadinma Ona ◽  
Jos Vanderleyden ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Azospirillum Brasilense ◽  
Prototype Model ◽  
Iaa Production ◽  
Indole 3 Acetic Acid

scholarly journals Contribution of Indole-3-Acetic Acid Production to the Epiphytic Fitness of Erwinia herbicola

1998 ◽  
Vol 64 (9) ◽  
pp. 3256-3263 ◽  
Author(s):  
M. T. Brandl ◽  
S. E. Lindow
Keyword(s):  
Acetic Acid ◽  
Mutant Strain ◽  
Parental Strain ◽  
Field Studies ◽  
Deficient Mutant ◽  
Erwinia Herbicola ◽  
Iaa Production ◽  
Root Bioassay ◽  
Population Sizes ◽  
Indole 3 Acetic Acid

ABSTRACT Erwinia herbicola 299R produces large quantities of indole-3-acetic acid (IAA) in culture media supplemented withl-tryptophan. To assess the contribution of IAA production to epiphytic fitness, the population dynamics of the wild-type strain and an IAA-deficient mutant of this strain on leaves were studied. Strain 299XYLE, an isogenic IAA-deficient mutant of strain 299R, was constructed by insertional interruption of the indolepyruvate decarboxylase gene of strain 299R with the xylE gene, which encodes a 2,3-catechol dioxygenase from Pseudomonas putidamt-2. The xylE gene provided a useful marker for monitoring populations of the IAA-deficient mutant strain in mixed populations with the parental strain in ecological studies. A root bioassay for IAA, in which strain 299XYLE inhibited significantly less root elongation than strain 299R, provided evidence that E. herbicola produces IAA on plant surfaces in amounts sufficient to affect the physiology of its host and that IAA production in strain 299R is not solely an in vitro phenomenon. The epiphytic fitness of strains 299R and 299XYLE was evaluated in greenhouse and field studies by analysis of changes in the ratio of the population sizes of these two strains after inoculation as mixtures onto plants. Populations of the parental strain increased to approximately twice those of the IAA-deficient mutant strain after coinoculation in a proportion of 1:1 onto bean plants in the greenhouse and onto pear flowers in field studies. In all experiments, the ratio of the population sizes of strain 299R and 299XYLE increased during periods of active growth on plant tissue but not when population sizes were not increasing with time.

scholarly journals Production of Indole-3-Acetic Acid: A White Biotechnology for Weed Biocontrol

2021 ◽  
Author(s):  
Sakaoduoen Bunsangiam ◽  
Nutnaree Thongpae ◽  
Savitree Limtong ◽  
Nantana Sri
Keyword(s):  
Acetic Acid ◽  
Cost Effective ◽  
Pilot Scale ◽  
Cyperus Rotundus ◽  
Shake Flask Culture ◽  
Iaa Production ◽  
Weed Growth ◽  
Fold Reduction ◽  
The One ◽  
Indole 3 Acetic Acid

Abstract Indole-3-acetic acid (IAA) is the most common plant hormone of the auxin class and regulates various plant growth processes. The present study investigated IAA production by the basidiomycetous yeast Rhodosporidiobolus fluvialis DMKU-CP293 using the one-factor-at-a-time (OFAT) method and response surface methodology (RSM). IAA production was optimized in shake-flask culture using a cost-effective medium containing 4.5% crude glycerol, 2% CSL and 0.55% feed-grade L-tryptophan. The optimized medium resulted in a 3.3-fold improvement in IAA production and a 3.6-fold reduction in cost compared with those obtained with a non-optimized medium. Production was then scaled up to a 15-L bioreactor and to a pilot-scale (100-L) bioreactor based on the constant impeller tip speed (Vtip) strategy. By doing so, IAA was successfully produced at a concentration of 3,569.32 mg/L at the pilot scale. To the best of our knowledge, this is the first report of pilot-scale IAA production by microorganisms. In addition, we evaluated the effect of crude IAA on weed growth. The results showed that weed (Cyperus rotundus L.) growth could be inhibited by 50 mg/L of crude IAA. IAA therefore has the potential to be developed as a herbicidal bioproduct to replace the chemical herbicides that have been banned in various countries, including Thailand.

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