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Ramos,Márcio V.; Araújo,Eliane S.; Oliveira,Raquel S. B.; Teixeira,Fabiano M.; Pereira,Danielle A.; Cavalheiro,Mariana G.; Souza,Diego P.; Oliveira,Jefferson S.; Freitas,Cleverson D. T. de. |
Latex is an endogenous milky fluid synthesized and accumulated under pressure in a network of laticifer cells. In this study, latices from five plant species were examined for deterrent effect on oviposition of two Coleoptera (Bruchidae) pests. The latex from Euphorbia tirucalli, Calotropis procera and Plumeria rubrae exhibited deterrent activity on oviposition of both Callosobruchus maculatusand Zabrotis subfasciatus beetles. The latex from Cryptostegia grandiflora and Himathantus drasticus were less effective to C. maculatus and Z. subfasciatus oviposition, respectively. Eggs laid on latex-treated seeds were not affected.The emergence and the mean time of development and weight of larvae grown in treated seeds were similar to the controls. The deterrent... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calotropis procera; Deterrent activity; Insect; Laticifers; Proteins; Plumeria rubra. |
Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000100008 |
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Freitas,Cleverson D. T. de; Souza,Diego P. de; Araújo,Eliane S.; Cavalheiro,Mariana G.; Oliveira,Luciana S.; Ramos,Márcio V.. |
In this study, proteins extracted from laticifer cells of three plants were examined by electrophoresis, mass spectrometry (MALDI-TOF) and characterized in respect of proteolytic, chitinolytic and anti-oxidative activities by means of zymography and colorimetric assays. Acidic proteins with molecular masses between 12.5 and 74.5 kDa predominated in laticifers of P. rubra. This profile was not found in laticifers of C. grandiflora and E. tirucalli. The later was poor in respect of proteins. Strong anti-oxidative activity of superoxide dismutase (E.C. 1.15.1.1) was detected in P. rubra and C. grandiflora latices, and to a lesser extent ascorbate peroxidase (E.C. 1.11.1.1) and isoforms of peroxidase were seen. Catalase (E.C. 1.11.1.6) was detected only in... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Catalase; Chitinase; Cysteine proteinase; Latex; Peroxidase. |
Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000100002 |
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