The Gram‐positive side of plant–microbe interactions

Francis, Isolde M.; Holsters, Marcelle; Vereecke, Danny

doi:10.1111/j.1462-2920.2009.01989.x

Cited by 197 publications

(94 citation statements)

References 95 publications

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“…2) which could be expected from higher population build up of the Gram (? )ve bacteria that predominate and establish more efficiently in soil [23]. Nevertheless, despite variations of the populations within the three soils, the microbial guilds grossly corroborated to those (10 6 -10 8 cfu/g soil) of the other mesophilic and saline rice fields [1,24] but were more than those (10 2 -10 6 cfu/g) of the continuous or regular textile effluent polluted or irrigated rice fields [3].…”

Section: Resultsmentioning

confidence: 99%

Microbial Dynamics and Diversity of Bacillus thuringiensis in Textile Effluent Polluted and Non-polluted Rice Field Soils of Orissa, India

2012

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Microbial diversity was assessed in the soils of non-polluted rice fields of Central Rice Research Institute and Choudwar, and textile effluent contaminated (about 30 years) rice fields of Choudwar about 4 years after cessation of pollution. The soils contained 0.62-1.01 % organic C and 0.07-0.12 % total N, and measured 6.18-8.24 pH and 0.6-2.68 mS/cm Eh which were more in the polluted Choudwar soil. The microbial populations (910 6 cfu/g soil) in the soils were: heterotrophs 1.21-10.9, spore formers 0.9-2.43, Gram (-)ve bacteria 4.11-8.0, nitrifiers 0.72-1.5, denitrifiers 0.72-2.43, phosphate solubilizers 0.14-0.9, asymbiotic nitrogen fixers 0.34-0.59, actinomycetes 0.07-0.11, fungi 0-0.5 and Bacillus thuringiensis (Bt) 0.4-0.61 which predominated in the polluted soil of Choudwar. The fungi were scarce in the polluted rice fields. The Bt isolates belonged to three motile and one non-motile group. Two motile Bt isolates were phenotyped as Bt subsp. sotto and israelensis, whereas, the non-motile isolate was Bt subsp. wahuensis. All Bt isolates produced extracellular protease, lipase and amylase enzymes. The microbial guilds had positive correlation among themselves, as well as, with soil physico-chemical characters but the fungi had negative relation and the nitrogen fixers were unrelated with the biotic and abiotic components.

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Section: Resultsmentioning

confidence: 99%

Microbial Dynamics and Diversity of Bacillus thuringiensis in Textile Effluent Polluted and Non-polluted Rice Field Soils of Orissa, India

2012

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“…They are able to produce several broad spectrum antibiotics and have a longer shelf life as a result of their ability to form endospores Cavaglieri et al, 2005 . This allows them to resist adverse environmental conditions and permit the easy formulation and storage of the commercial products Schallmey et al, 2004;Francis et al, 2010 . In addition to their antibiotic properties, Bacillus spp.…”

Section: Bacillus As Pgprmentioning

confidence: 99%

Integrated Management Strategies for Tomato Fusarium Wilt

Ajilogba

2013

Biocontrol Sci.

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Fusarium wilt is caused by the fungal pathogens, Fusarium oxysporum or Fusarium solani. It is a devastating disease that affects many important food and vegetable crops and a major source of loss to farmers worldwide. Initial strategies developed to combat this devastating plant disease include the use of cultural, physical and chemical control. None of these strategies have been able to give the best results of completely ameliorating the situation except for the cultural method which is mainly preventive. A good knowledge of the nature, behaviour and environmental conditions of growth of the disease agent is very important to controlling the disease development in that case. Biological control has been shown to be an environmentally friendly alternative. It makes use of rhizospheric and endophytic microorganisms that can survive and compete favourably well with the Fusarium wilt pathogen. They include plant growthpromoting rhizobacteria PGPR such as Bacillus spp. and Pseudomonas spp.. For PGPR to control or inhibit the growth of the Fusarium wilt pathogen, they make use of mechanisms such as indole acetic acid production, siderophore production, phosphate solublilization, systemic resistance induction and antifungal volatile production among others.

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“…In addition to their potential to directly reduce the incidence of diseases, some microbial products also have other positive effects on crops such as promoting plant growth and nutrition (biofertilizers and phytostimulators) and/or facilitating interaction between the host plant and other beneficial organisms (Antoun & Prevost, 2006). A large amount of nutrients present in the soil are in an insoluble form that is unavailable for the crops (Francis et al, 2010). Biofertilizers act trough the direct improvement of plant nutrition either by solubilizing these nutrients or by fixing atmospheric N 2 .…”

Section: Advantages and Marketshare Of Biopesticidesmentioning

confidence: 99%