Chitin-mediated changes in bacterial communities of the soil, rhizosphere and within roots of cotton in relation to nematode control

Hallmann, Johannes; Rodrı́guez-Kábana, R.; Kloepper, Joseph W.

doi:10.1016/s0038-0717(98)00146-1

Cited by 178 publications

(106 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Agar and water were used in current experiment as the growing media for the rice to devoid the seedling from any nutrients to accurately measure the sole effect of microbial CF . The present results are in accord with the previous findings of Kang et al, (2012), suggesting that the application of bacterial culture, enhancesthe plant growth by direct augmentation of the growth hormones which induce the rapid cell division and cell elongation (Glick, 1995;Hallmann et al, 1999;Ikeda et al, 2002;Compant et al, 2005). Results of the application of CF on plant in the second round to experiment confirmed a dual role of P. temperata M1021 in agriculture.…”

Section: Discussionsupporting

confidence: 92%

“…Chemical control has been used frequently in many parts of the world (Smith et al, 1999). Although they minimize the harmful effects of insects and phytopathogenic microorganisms, the use of agrochemicals poses severe environmental hazards, such as the leaching of nitrates and other undesirable compounds into groundwater (Hallmann et al, 1999). These agrochemicals are often non-degradable and bioaccumulated, thus posing health risks to consumers (Hu & Webster, 2000).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

ASSESSMENT OF AGRICULTURALLY IMPORTANT METABOLITES FROM THE ENTOMOPATHOGENIC BACTERIUM, Photorhabdus temperata M1021

Ullah¹,

Anwar²,

Al‐Ghamdi³

et al. 2017

JEBAS

View full text Add to dashboard Cite

Photorhabdus temperata M1021 is an entomopathogenic enterobacterium, producing an array of metabolites in the culture extract. Photorhabdus spp. produced various classes of toxic proteins and secondary metabolites, which generate mortality in a wide range of insects. Aim of present study was to assess the effects these metabolites towards the insect and plants. Intra-hemocoel injections of whole cell and soluble extract caused 100% mortality in Galleria mellonella larvae within 48 h as compare to control. However, the culture filtrate (CF) took 72 h to kill 100 % larvae. In addition, there was no significant (P<0.05) decrease in the rate of larval mortality, injected with CF, treated at 70°C for 30 min as well as with 50 mg/l proteinase-K. Gas chromatography mass spectrometry analysis revealed 23 compounds, among which "trans-Cinnamic acid" and "indole" were the most important for the insecticidal activities and plant growth promotion. The auxin contents quantified through Salkowski's assay were 28 μg/ml to 30 μg/ml, insignificantly varied the by the addition of L-tryptophan ranged from 0 g/l to 0.5 g/l. The optimum pH for the auxin production was determined to be pH 7.0. The CF treatment increases significantly (P<0.05) plant growth that attributes e.g. total plant length, chlorophyll content and biomass of both Dongjin-beyo and Waito-Crice plants, in a comparison with control. The findings of this study suggest that the P. temperata M1021 could be an ideal candidate, to be exploited in agriculture as biocontrol agent. * Corresponding author KEYWORDS Plant microbe interaction Photorhabdus temperate Plant growth promotion Insecticidal activityGalleria mellonella

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

ASSESSMENT OF AGRICULTURALLY IMPORTANT METABOLITES FROM THE ENTOMOPATHOGENIC BACTERIUM, Photorhabdus temperata M1021

Ullah¹,

Anwar²,

Al‐Ghamdi³

et al. 2017

JEBAS

View full text Add to dashboard Cite

show abstract

“…Improved disease control by the two chitinolytic strains in the presence of chitin could be due to the increase in their populations by >log 1.0 CFU g -1 of leaf. Addition of chitin to soil at 1% (wt/vol) increased the chitinolytic fungal and bacterial populations and significantly reduced Meloidogyne incognita infestation of cotton even in a second planting (17). Soil amendment of chitin increased the bacterial and actinomycete populations in fields with a history of severe Fusarium yellows of celery and reduced the disease incidence (3).…”

Section: Discussionmentioning

confidence: 99%

“…Chitin-supplemented application of Stenotrophomonas maltophilia C3 improved the control of bean rust (38) and leaf spot of Festuca arundinacea (40) compared with that of strain C3 alone. Chitin-supplemented application of chitinolytic bacteria has also been proved effective in control of other foliar diseases including early leaf spot of peanut (22) and soilborne diseases (3,17). Phyllobacteria can modify their environment to enhance their colonization of plants by increasing local nutrient concentrations or by producing a layer of extracellular polysaccharides either on the surface of leaves or in the interior (2).…”

mentioning

confidence: 99%

Biological Control of Late Leaf Spot of Peanut (Arachis hypogaea) with Chitinolytic Bacteria

Kishore¹,

Pande²,

Podile³

2005

Phytopathology®

100

View full text Add to dashboard Cite

Late leaf spot (LLS), caused by Phaeoisariopsis personata, is a foliar disease of groundnut or peanut (Arachis hypogaea) with high economic and global importance. Antifungal and chitinolytic Bacillus circulans GRS 243 and Serratia marcescens GPS 5, selected among a collection of 393 peanut-associated bacteria, were applied as a prophylactic foliar spray and tested for control of LLS. Chitin-supplemented application of B. circulans GRS 243 and S. marcescens GPS 5 resulted in improved biological control of LLS disease. Supplementation of bacterial cells with 1% (wt/vol) colloidal chitin reduced lesion frequency by 60% compared with application of bacterial cells alone, in the greenhouse. Chitinsupplemented application of GRS 243 and GPS 5 also resulted in improved and stable control of LLS in a repeated field experiment and increased the pod yields by 62 and 75%, respectively, compared with the control. Chitin-supplemented application of GPS 5 was tested in six onfarm trials, and the increase in pod yields was up to 48% in kharif (rainy season). A 55-kDa chitinase was purified from the cell-free culture filtrate of GPS 5 by affinity chromatography and gel filtration. Purified chitinase of S. marcescens GPS 5 (specific activity 120 units) inhibited the in vitro germination of P. personata conidia, lysed the conidia, and effectively controlled LLS in greenhouse tests, indicating the importance of chitinolysis in biological control of LLS disease by GPS 5.

show abstract

“…, chitinase (Zhang , 2009), (Palma-Guerrero , 2010). (Hallmann , 1998) (Godoy , 1983). (Sharp, 2013).…”

mentioning

confidence: 99%

Control of the Root-Knot Nematode (Meloidogyne spp.) on Cucumber by a Liquid Bio-Formulation Containing Chitinolytic Bacteria, Chitin and Their Products

Ha¹,

Kim²,

Jung³

et al. 2014

Research in Plant Disease

View full text Add to dashboard Cite

A liquid bio-formulation containing chitinolytic bacteria, chitin and their products was assessed for its potential biological control against root-knot nematodes on cucumber. The bio-formulation was prepared by cultures of three chitinolytic bacteria, Chromobacterium sp. strain C-61, Lysobacter engymogenes and Serratia plymuthica in minimal medium supplemented with chitin. Under pot conditions, the bio-formulation showed better growth of cucumber plants, and less root galls and population density of Meloidogyne spp. than control media without the bio-formulation. In a greenhouse, 75-fold diluted bio-formulations were treated instead of water around cucumber plants through hoses for drip irrigation six times at 5-day intervals from the transplanting date. After 30 and 60 days, the treatment provided about 7% and 10% enhancement in the plant height and about 78% and 69% reduction in population density of Meloidogyne spp. in the rhizosphere, respectively. In addition, the experiments showed that the control effects occurred only in the soils contacted with the bio-formulation. Undiluted bio-formulations were drenched three times at 10-day intervals around cucumber plants severely infested with Meloidogyne spp. The treatment showed about 37% plant enhancement without dead plants compared with 37% death in the untreated control, and about 82% nematode reduction. These results suggest that the bio-formulation can be practically used to control the root-knot nematode on cucumber.

show abstract

Chitin-mediated changes in bacterial communities of the soil, rhizosphere and within roots of cotton in relation to nematode control

Cited by 178 publications

References 25 publications

ASSESSMENT OF AGRICULTURALLY IMPORTANT METABOLITES FROM THE ENTOMOPATHOGENIC BACTERIUM, Photorhabdus temperata M1021

ASSESSMENT OF AGRICULTURALLY IMPORTANT METABOLITES FROM THE ENTOMOPATHOGENIC BACTERIUM, Photorhabdus temperata M1021

Biological Control of Late Leaf Spot of Peanut (Arachis hypogaea) with Chitinolytic Bacteria

Control of the Root-Knot Nematode (Meloidogyne spp.) on Cucumber by a Liquid Bio-Formulation Containing Chitinolytic Bacteria, Chitin and Their Products

Contact Info

Product

Resources

About