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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
31/07/1995 |
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Data da última atualização: |
09/11/1995 |
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Autoria: |
BELLOTTI, A. C.; RIIS, L. |
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Afiliação: |
Centro Internacional de Agricultura Tropical. Apartado Aereo 6713, Cali, Colombia. |
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Título: |
Cassava cyanogenic potential and resistance to pests and diseases. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Acta Horticulturae, n.375, p.141-151, 1994. |
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ISSN: |
0567-7572 |
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Idioma: |
Inglês |
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Conteúdo: |
Cyanogenesis, tjhe ability to generate hydrogen cyanide (HCN), is taxonomically widespread in the plant kingdom; over 1000 plant species are reported to produce cyanogenic glucosides in variable concentrations. Cassava (Manihot esculenta Crantz), a highly cyanogenic species, originated in the Neotropics, where many farmers and indigenous peoples prefer to cultivate varieties with high rather than low cyanogenic potential. These are several hypotheses that might explain this preference, one of which asserts that HCN released by the plants is a defense mechanism against pathogens, arthropods and mammalian pests. Evidence of HCN as a feeding deterrent to arthropons has been demonstrated in plants such as sorghum, withe clover and peach. Two cassava pest appear to be deterred from feeding due to cassava leaf and root cyanogen content. It has been shown that growing cassava is an unacceptable food for the grasshopper, Zonocerus variegatus, because of the relatively large amounts of cyanogens produced in the leaves. Cassava roots contain variable amounts of cyanogens and research has shown that the burrowing bug, Cyrtomenus bergi, prefers feeding on roots with low rather than high cyanogen content. Nymphal mortality was greater on a cassava clone with high cyanogenic potential, while adult insects lived longer and produced more eggs on a clone with low cyanogenic potential. |
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Palavras-Chave: |
Cyanogenic potential; HCN; Host plant resistance; Pathogensl. |
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Thesagro: |
Manihot Esculenta. |
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Thesaurus Nal: |
arthropods; Cyrtomenus bergi; pathogens. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02019naa a2200241 a 4500
001 1634134
005 1995-11-09
008 1994 bl uuuu u00u1 u #d
022 $a0567-7572
100 1 $aBELLOTTI, A. C.
245 $aCassava cyanogenic potential and resistance to pests and diseases.
260 $c1994
520 $aCyanogenesis, tjhe ability to generate hydrogen cyanide (HCN), is taxonomically widespread in the plant kingdom; over 1000 plant species are reported to produce cyanogenic glucosides in variable concentrations. Cassava (Manihot esculenta Crantz), a highly cyanogenic species, originated in the Neotropics, where many farmers and indigenous peoples prefer to cultivate varieties with high rather than low cyanogenic potential. These are several hypotheses that might explain this preference, one of which asserts that HCN released by the plants is a defense mechanism against pathogens, arthropods and mammalian pests. Evidence of HCN as a feeding deterrent to arthropons has been demonstrated in plants such as sorghum, withe clover and peach. Two cassava pest appear to be deterred from feeding due to cassava leaf and root cyanogen content. It has been shown that growing cassava is an unacceptable food for the grasshopper, Zonocerus variegatus, because of the relatively large amounts of cyanogens produced in the leaves. Cassava roots contain variable amounts of cyanogens and research has shown that the burrowing bug, Cyrtomenus bergi, prefers feeding on roots with low rather than high cyanogen content. Nymphal mortality was greater on a cassava clone with high cyanogenic potential, while adult insects lived longer and produced more eggs on a clone with low cyanogenic potential.
650 $aarthropods
650 $aCyrtomenus bergi
650 $apathogens
650 $aManihot Esculenta
653 $aCyanogenic potential
653 $aHCN
653 $aHost plant resistance
653 $aPathogensl
700 1 $aRIIS, L.
773 $tActa Horticulturae$gn.375, p.141-151, 1994.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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