Data/hora: 17/06/2024 03:34:41

Biblioteca(s): | Embrapa Amazônia Ocidental; Embrapa Unidades Centrais.
Data corrente: | 21/03/2011
Data da última atualização: | 02/02/2018
Autoria: | FÄY, E. de; MORAES, L. A. C.; MORAES, V. H. de F.
Afiliação: | Elisabeth de Faÿ, Nancy Université; LARISSA ALEXANDRA CARDOSO MORAES, CPAA; Vicente Haroldo de Figueiredo Moraes, In memoriam.
Título: | Cyanogenesis and the onset of tapping panel dryness in rubber tree.
Ano de publicação: | 2010
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 45, n. 12, p. 1372-1380, dez. 2010.
Idioma: | Inglês
Conteúdo: | The objective of this work was to study the influence of cyanogenesis on the onset of irreversible tapping panel dryness (TPD) and the physiological and histological aspects of secondary phloem in the trunk (tapping panel) of rubber trees (Hevea spp.). Two cyanogenic compounds, linamarin and KCN, were applied separately on the trunk bark of healthy mature trees belonging to two Brazilian clones (Fx 4098 and Fx 3899). Changes in histology, latex pressure potential (YP) and cyanogenic potential (HCNP) were followed in the trunk inner barks. In addition, the HCNp levels were determined in TPD-affected plants of both clones. The applications of linamarin or KCN in healthy plants decreased latex YP, and formed tylosoids associated with in situ coagulation of latex. The clone Fx 4098 had the higher HCNp and showed the quicker and stronger responses to the cyanogenic compounds. Plants with TPD syntoms had a higher HCNp than the untreated healthy ones. Since histological changes are also structural markers of early TPD, it can be inferred that excessive release of cyanide can induce it in sensitive rubber clones.
Palavras-Chave: | Clonal sensitivity; Cyanogenic potential; Floema secundário; Latex pressure potential; Linamarin; Linamarina; Potencial cianogênico; Potencial de pressão de látex; Sensibilidade clonal.
Thesagro: | Hevea.
Thesaurus Nal: | secondary phloem.
Categoria do assunto: | --

URL:

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/172067/1/v45n12a06.pdf
http://ainfo.cnptia.embrapa.br/digital/bitstream/item/105581/1/Cyanogenesis.pdf

Registro original: | Embrapa Amazônia Ocidental (CPAA)

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