Antagonistic activity of coconut rhizospheric and endophytic Bacillus spp. against Ganoderma applanatum and Thielaviopsis paradoxa

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dc.contributor.authorPriya George
dc.contributor.authorAlka Gupta
dc.contributor.authorMurali Gopal
dc.contributor.authorChandra Mohanan, R.
dc.contributor.authorLitty Thomas
dc.contributor.authorGeorge V. Thomas
dc.date.accessioned2014-05-24T05:18:46Z
dc.date.available2014-05-24T05:18:46Z
dc.date.issued2011
dc.description.abstractA screening study was carried out to detect the antagonistic potential of Bacillus spp. against Ganoderma applanatum and Thielaviopsis paradoxa, fungal pathogens of coconut. A total of 327 heat resistant, endospore producing bacilli were isolated from the rhizospheric soil and roots of coconut growing in Kerala, Tamil Nadu, Karnataka, Andhra Pradesh and Maharashtra. All the isolates were tested for antifungal activity against G. applanatum and T. paradoxa by dual cultural technique on nutrient agar medium. The zone of inhibition was measured and percentage of inhibition was calculated. More than 90 % of the rhizospheric and root endophytic isolates were found to effectively inhibit the mycelial growth of G. applanatum, with a maximum inhibition zone of 12 mm and percentage inhibition ranging from 44 to 91. About 86 % of the isolates inhibited the mycelial growth of T. paradoxa, with a maximum inhibition zone of 14 mm and percentage inhibition ranging from 42 to 93. Further tests of potent antagonists revealed that more than one mode of mechanisms like production of chitinase, siderophores, HCN, antibiotics, ammonia, β-1,3- glucanase and salicylic acid may be involved in the antagonistic activities. The results of this study revealed 13 Bacillus spp. having potential for use as biocontrol agents against G. applanatum and T. paradoxa, fungal pathogens of coconut.en_US
dc.identifier.citationJournal of Plantation Crops, 2011, 39 (2): 278-284en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1689
dc.language.isoenen_US
dc.subjectAntagonistic activityen_US
dc.subjectAntifungal metabolitesen_US
dc.subjectBacillus spp.en_US
dc.subjectCoconuten_US
dc.subjectGanoderma applanatumen_US
dc.subjectThielaviopsis paradoxaen_US
dc.subject
dc.subject
dc.subject
dc.titleAntagonistic activity of coconut rhizospheric and endophytic Bacillus spp. against Ganoderma applanatum and Thielaviopsis paradoxaen_US
dc.typeArticleen_US

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