J
José Xavier-Filho
Researcher at State University of Norte Fluminense
Publications - 69
Citations - 2348
José Xavier-Filho is an academic researcher from State University of Norte Fluminense. The author has contributed to research in topics: Callosobruchus maculatus & Vigna. The author has an hindex of 30, co-authored 69 publications receiving 2213 citations. Previous affiliations of José Xavier-Filho include Federal University of Ceará.
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Resolution and partial characterization of proteinases and α-amylases from midguts of larvae of the bruchid beetle Callosobruchus maculatus (F.)
TL;DR: Three proteinases and four α-amylases wre identified in Callosobruchus maculatus larvae have the same M r (25,000) and optimum pH between 5.5 and 6.0 and are inhibited by iodoacetic acid, iodoacetamide, pCMB, TLCK, TPCK and E-64.
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Do Legume Storage Proteins Play a Role in Defending Seeds against Bruchids
TL;DR: The seeds of plants are rich stores of proteins, carbohydrates, and lipids and are therefore used by heterotrophs as valuable food sources and humans have learned how to increase the levels and the quality of their components.
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Biological Effects of Canatoxin in Different Insect Models: Evidence for a Proteolytic Activation of the Toxin by Insect Cathepsinlike Enzymes
Célia R. Carlini,Antônia E. A. Oliveira,PatrÍCia Azambuja,José Xavier-Filho,Michael A. Wells +4 more
TL;DR: The data showed that canatoxin is highly toxic when ingested by some species of insects but not affecting others, probably in correlation with the characteristics of the digestive process of the insect.
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Poor correlation between the levels of proteinase inhibitors found in seeds of different cultivars of cowpea (Vigna unguiculata) and the resistance/susceptibility to predation by Callosobruchus maculatus
José Xavier-Filho,Francisco A. P. Campos,Maria B. Ary,C. Peres Silva,Marta Carvalho,Maria Lígia Rodrigues Macedo,Francisco J.A. Lemos,G. Grant +7 more
TL;DR: The C. maculatus resistant cowpea seeds support the development of Zabrotes subfasciatus, a bruchid that infests seeds of both Phaseolus vulgaris and Vigna unguiculata.
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Vicilin variants and the resistance of cowpea (Vigna unguiculata) seeds to the cowpea weevil (Callosobruchus maculatus)
TL;DR: The results strongly suggest that the resistance of cowpea seeds from the cultivar TVu 2027 and from others bred from it is associated with the presence of vicilin molecules which are refractory to digestion by bruchid midgut proteinases.