The roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips
Floral 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 stru...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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2011
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| Online Access: | https://hdl.handle.net/10568/83300 |
| _version_ | 1855515605144174592 |
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| author | Alabi, O.Y. Odebiyi, J.A. Tamò, Manuele Omoloye, A.A. |
| author_browse | Alabi, O.Y. Odebiyi, J.A. Omoloye, A.A. Tamò, Manuele |
| author_facet | Alabi, O.Y. Odebiyi, J.A. Tamò, Manuele Omoloye, A.A. |
| author_sort | Alabi, O.Y. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Floral 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. |
| format | Journal Article |
| id | CGSpace83300 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2011 |
| publishDateRange | 2011 |
| publishDateSort | 2011 |
| record_format | dspace |
| spelling | CGSpace833002025-10-16T09:52:51Z The roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips Alabi, O.Y. Odebiyi, J.A. Tamò, Manuele Omoloye, A.A. vigna unguiculata terpenoids flavonoids polyphenols cowpeas cultivars metabolites flower bud thrips host plant resistance Floral 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. 2011-06-20 2017-08-31T12:19:40Z 2017-08-31T12:19:40Z Journal Article https://hdl.handle.net/10568/83300 en Limited Access Alabi, 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. |
| spellingShingle | vigna unguiculata terpenoids flavonoids polyphenols cowpeas cultivars metabolites flower bud thrips host plant resistance Alabi, O.Y. Odebiyi, J.A. Tamò, Manuele Omoloye, A.A. The roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips |
| title | The roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips |
| title_full | The roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips |
| title_fullStr | The roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips |
| title_full_unstemmed | The roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips |
| title_short | The roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips |
| title_sort | roles of plant secondary metabolites from cowpea floral structures in resistance to the flower bud thrips |
| topic | vigna unguiculata terpenoids flavonoids polyphenols cowpeas cultivars metabolites flower bud thrips host plant resistance |
| url | https://hdl.handle.net/10568/83300 |
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