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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Transcriptome differential co-expression reveals distinct molecular response of fall-armyworm strains toDIMBOA

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Author(s):
Silva-Brandao, Karina Lucas [1, 2, 3] ; Murad, Natalia Faraj [3, 4] ; Peruchi, Aline [1] ; Martins, Carlos Henrique Zanini [5] ; Omoto, Celso [6] ; Figueira, Antonio [1] ; Brandao, Marcelo Mendes [3] ; Trigo, Jose Roberto [7]
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Ctr Energia Nucl Agr, Piracicaba - Brazil
[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Av Estados 5001, BR-09210580 Santo Andre, SP - Brazil
[3] Univ Estadual Campinas, Ctr Biol Mol & Engn Genet, Campinas - Brazil
[4] Univ Estadual Campinas, Inst Biol, Programa Posgrad Genet & Biol Mol, Campinas - Brazil
[5] Univ Estadual Campinas, Inst Biol, Programa Posgrad Biol Func & Mol, Campinas - Brazil
[6] Univ Sao Paulo, Escola Agr Luiz de Queiroz, Dept Entomol & Acaral, Piracicaba - Brazil
[7] Univ Estadual Campinas, Inst Biol, Dept Biol Anim, Campinas - Brazil
Total Affiliations: 7
Document type: Journal article
Source: Pest Management Science; v. 77, n. 1 SEP 2020.
Web of Science Citations: 0
Abstract

BACKGROUND 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), the main benzoxazinoid found in corn, elicits variable larval responses from different pest moths. For the widespread and highly polyphagousSpodoptera frugiperda(Lepidoptera: Noctuidae), the fall-armyworm (FAW), DIMBOA acts as a feeding stimulant and improves larval growth at low concentrations. The FAW present two host plant-related strains, corn and rice strains, related to host preference on corn and other Graminae or rice. Based on both host preference and strain divergence of the FAW on corn, a cereal containing DIMBOA, and rice, lacking this compound, we question if corn and rice strains larvae respond equally toward DIMBOA. We evaluated differential expression in the transcriptome of both midgut and fat body larval tissues of the two strains reared on either DIMBOA-enriched artificial diet or control diet and inferred Bayesian networks. RESULTS We found differences in performance between corn and rice strain larvae reared on DIMBOA, as well as several differentially regulated contigs annotated as esterases, peptidases, transferases and reductases, all of them known for being related to responses of lepidopterans and other insects to DIMBOA. We also found a UDP-glucuronosyltransferase very similar to others found in many lepidopterans occupying a central hub within a transferase Bayesian network, suggesting that it is essential to an effective response to DIMBOA in FAW. CONCLUSION Our results suggest that there is an intrinsic cost for FAW rice strain larvae to metabolize corn-originated hydroxamic acids, which could have resulted in the partial host-associated genetic isolation found at FAW field populations. (AU)

FAPESP's process: 11/00417-3 - System biology techniques applied to the agriculture: transcriptomes and interactomes analyses
Grantee:Marcelo Mendes Brandao
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 12/16266-7 - Population genomics: a new approach for studies of speciation in insects due to host use applied to the development of sustainable strategies of IPM
Grantee:Karina Lucas da Silva-Brandão
Support Opportunities: Research Grants - Young Investigators Grants