Reduction in arsenic toxicity and uptake in rice (Oryza sativa L.) by As-resistant purple nonsulfur bacteria

Nookongbut, Phitthaya; Kantachote, Duangporn; Megharaj, Mallavarapu; Naidu, Ravi

doi:10.1007/s11356-018-3568-8

Cited by 48 publications

(28 citation statements)

References 61 publications

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“…Siderophores-producing bacteria could overcome this negative effect of acidic Fe rich soil (Stein et al, 2009). Moreover, siderophores produced by PNSB were able to mitigate the toxic effects of arsenic stress on seedling growth (Nookongbut et al, 2018). Since PNSB could produce siderophores in the present study, it should be possible to apply them to acid sulfate soils.…”

Section: Discussionmentioning

confidence: 82%

“…The siderophores-producing PNSB were tested with a slightly modified Chrome Azurol Sulfonate (CAS) Assay as described by Nookongbut et al (2018). Three wells were created in a triangle on a CAS agar plate, and each well was inoculated with a 300 µl PNSB inoculum.…”

Section: Characterization Of Pgp Traitsmentioning

confidence: 99%

“…R. palustris strains not only promote growth in plants but also induce resistance to stresses from sodium and heavy metals (Nunkaew et al, 2014;Kantachote et al, 2016;Sakpirom et al, 2017;Nookongbut et al, 2018). For instance, R. palustris released ALA to alleviate the effects of NaCl on rice growth (Nunkaew et al, 2014;2015a, b).…”

Section: Introductionmentioning

confidence: 99%

“…For instance, R. palustris released ALA to alleviate the effects of NaCl on rice growth (Nunkaew et al, 2014;2015a, b). In addition to ALA, other PGPS could promote rice growth under arsenic (As) stress by increasing chlorophylls to support both antioxidant scavenging enzymes and non-enzymatic systems that exclude As species from rice (Nookongbut et al, 2018). The kidney bean (Phaseolus vulgaris L.) is a major food legume that provides proteins and essential amino acids to several million people (Rangel et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Selection of Acid Tolerant Purple Nonsulfur Bacteria for Application in Agriculture

Nookongbut¹,

Jingjit²,

Kantachote³

et al. 2020

CMUJNS

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To screen acid tolerant purple nonsulfur bacteria (PNSB) isolated from peat swamp forests for their abilities to produce plant growth promoting substances (aminolevulinic acid: ALA, siderophores, indole-3-acetic acid: IAA) and also release ammonium from N2 fixation. Among 10 PNSB isolates grown in basic isolation medium (BIM), pH 4.5 found that strain KKSSR91 was the most effective to release ALA and siderophores under microaerobic light conditions; while strain KTPWG11 exhibited highest production of siderophores under aerobic dark conditions. Based on ALA production in medium containing 60 mM glycine, 4 PNSB isolates were selected for further studies and found that strain KTSSR92 produced highest IAA at 36.9 mg/L. All of them were able to release NH4 + , but no activity to solubilize phosphate. In addition, maximal ALA production in the medium supplemented with glycine by strain KKSSR91 was 2.89 mg/L at 4000 lux light intensity. Seed germination index (GI) of kidney bean (Phasecolus vulgaris L.) test using strain KKSSR91 at 1 g fresh biomass/L, pH 4.5 was 68.81% compared with a control in distilled water as only 58.68%. Strain KKSSR91 was identified using 16S rRNA sequencing and found that it showed 99% similarity with Rhodopseudomonas palustris.

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Section: Discussionmentioning

confidence: 82%

Section: Characterization Of Pgp Traitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Selection of Acid Tolerant Purple Nonsulfur Bacteria for Application in Agriculture

Nookongbut¹,

Jingjit²,

Kantachote³

et al. 2020

CMUJNS

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“…The problem is more serious in paddy fields because the threat can spread in soil and water affecting soil fertility, water quality and human health in the wider environment (Neculita and Rosa 2019). In the pursuit of sustainable agricultural development, metal-resistant microorganisms have been studied for their ability to transform metals ions and heavy metals, and to reduce metal toxicity, cations and divalent cations (Nunkaew et al 2015;Nookongbut et al 2016Nookongbut et al , 2018Panhwar et al 2016;Sakpirom et al 2017Sakpirom et al , 2019Khuong et al 2018). To our knowledge, little study has taken place of Mn 2+ -resistant PNSB for this purpose in acid paddy fields.…”

Section: Discussionmentioning

confidence: 99%

Potential of Mn2+-Resistant Purple Nonsulfur Bacteria Isolated from Acid Sulfate Soils to Act as Bioremediators and Plant Growth Promoters via Mechanisms of Resistance

Khương

Kantachote

Thúc

et al. 2020

J Soil Sci Plant Nutr

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Resistance mechanisms of acid Mn 2+-resistant purple nonsulfur bacteria (PNSB) were investigated to determine their ability to alleviate adverse effects of excess manganese on plant growth and productivity in acid sulfate soils (ASS). PNSB were isolated and selected based on their resistance to acid and manganese. Their resistance mechanisms were assessed on the basis of biosorption, bioaccumulation, and plant growth promoting properties. Six PNSB were selected for their resistance to Mn 2+ in acidic conditions (pH 3.5-5.5). They were identified as Rhodopseudomonas palustris strains TLS12, VNS19, VNS32, VNS62, and VNW95, and Rhodopseudomonas harwoodiae strain TLW42. Under aerobic dark and microaerobic light incubating conditions in aqueous solution at pH 4.25 for 30 min, these strains adsorbed Mn 2+ (1500 mg L −1) more effectively with released exopolymeric substances (EPS) than with their biomass. Under both incubating conditions, bioaccumulation of Mn 2+ diminished in the following order: cell wall, cytoplasm, plasma membrane. Scanning electron microscope-energy dispersive X-ray spectrometry (SEM-EDS) found accumulated manganese (0.30-0.67% of total elements) in bacterial cells caused morphological change in the form of wrinkles and bleb-like features on exterior surfaces. All selected strains under both incubating conditions released NH 4 + by N 2 fixing and PO 4 3− by solubilizing phosphate from various P-sources. Siderophores, 5-aminolevulinic acid (ALA), and indole-3-acetic acid (IAA) were also released and pH increased. The studied strains showed potential as bioremediators that could reduce Mn 2+ toxicity using EPS and effectively release nutrients and plant growth promoting substances to improve cultivation and fertility in acidic conditions.

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Remedial Approaches to Arrest Arsenic in Soil–Plant System to Prevent Its Entry in Rice Grain—a Review

Lama,

Majumder,

Mridha

et al. 2024

Arsenic Remediation of Food and Water

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Reduction in arsenic toxicity and uptake in rice (Oryza sativa L.) by As-resistant purple nonsulfur bacteria

Cited by 48 publications

References 61 publications

Selection of Acid Tolerant Purple Nonsulfur Bacteria for Application in Agriculture

Selection of Acid Tolerant Purple Nonsulfur Bacteria for Application in Agriculture

Potential of Mn2+-Resistant Purple Nonsulfur Bacteria Isolated from Acid Sulfate Soils to Act as Bioremediators and Plant Growth Promoters via Mechanisms of Resistance

Remedial Approaches to Arrest Arsenic in Soil–Plant System to Prevent Its Entry in Rice Grain—a Review

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