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dc.contributor.authorAlabi, O.Y.
dc.contributor.authorOdebiyi, J.A.
dc.contributor.authorTamò, M.
dc.contributor.authorOmoloye, A.A.
dc.date.accessioned2019-12-04T11:10:13Z
dc.date.available2019-12-04T11:10:13Z
dc.date.issued2011-06-20
dc.identifier.citationAlabi, O.Y., Odebiyi, J.A., Tamo, M. & Omoloye, A.A. (2011). The roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips. Journal of Agricultural Science and Technology A, 262-269.
dc.identifier.issn2161-6256
dc.identifier.urihttps://hdl.handle.net/20.500.12478/2028
dc.description.abstractFloral structures of six cowpea (Vigna unguiculata) cultivars were analysed for secondary plant metabolites (polyphenols, terpenoids and flavonoids) to study their relationships with resistance to Megalurothrips sjostedti (Trybom). Polyphenols varied significantly (P < 0.001) among the floral structures of the cultivars at the same growth stage. Significant negative correlations were obtained between polyphenols and damage indices (r = -0.57), mean adult counts (r = -0.56) and mean larval counts (r = -0.64) of resistant cowpea cultivars especially in the late season, indicating that polyphenols play a significant role in cowpea resistance to M. sjostedti. High levels of polyphenols obtained from Sanzibanili and Sewe cultivars, coupled with highly significant correlations between the polyphenols and thrips population on resistant cultivars, and their damage indices, suggests that these polyphenols could be inhibitors or deterrents in this case. Terpenoid extracts (10 mg/mL) of IT90K-277-2, Sewe, Sanzibanili, TVu 1509 and KV × 404-8-1 racemes; KV × 404-8-1 and TVu 1509 floral buds; IT90K-277-2, Sewe and Sanzibanili flowers caused significant (P < 0.001) larval mortalities, since mortality ranged between 56.7%-96.7%. Hence terpenoid extracts from floral structures of the cultivars are biologically active and confers antibiotic resistance to M. sjostedti larvae; this compound could be promising candidates for genetic transformation of cowpea cultivars.
dc.format.extent262-269
dc.language.isoen
dc.subjectVigna Unguiculata
dc.subjectTerpenoids
dc.subjectFlavonoids
dc.subjectPolyphenols
dc.subjectCowpeas
dc.subjectCultivars
dc.subjectMetabolites
dc.subjectFlower Bud Thrips
dc.subjectHost Plant Resistance
dc.titleThe roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationUniversity of Ibadan
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectCowpea
cg.iitasubjectGrain Legumes
cg.journalJournal of Agricultural Science and Technology A
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid85841
cg.targetaudienceScientists


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