| Registro completo |
| Provedor de dados: |
Bragantia
|
| País: |
Brazil
|
| Título: |
Um enrolamento das fôlhas do fumo de causa genética
|
| Autores: |
Costa,A. S.
Forster,R.
|
| Data: |
1949-01-01
|
| Ano: |
1949
|
| Resumo: |
A type of leaf-roll has been noticed for many years in commercial tobacco plantings in the State of S. Paulo. Leaf-roll plants were supposed to be affected by a virus disease, but repeated attempts to transmit it by grafting, juice inoculation and by insect vectors failed consistently. Later studies showed that the leaf-roll condition is due to genetic factors and that probably more than a pair of recessive genes are involved in its transmission. Even after the genetic nature of the leaf-roll condition was definitely established, attempts were made to induce the leaf-roll condition in plants genetically normal by several methods : 1. Spraying their leaves with the juice from leaf-roll plants ; 2. Approach-grafting a leaf-roll scion onto a normal plant and vice-versa, following with defoliation, cutting back or shading of the normal graft component. This was done to stimulate translocation of the phloem contents from the leaf-roll scion or stock into the normal stock or scion respectively. It was thought that if leaf-roll were due to the genetically controlled production of a hormone-like substance, these treatments might induce the leaf-roll condition in plants genetically normal. The results, however, have been negative.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Português
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051949000100005
|
| Editor: |
Instituto Agronômico de Campinas
|
| Relação: |
10.1590/S0006-87051949000100005
|
| Formato: |
text/html
|
| Fonte: |
Bragantia v.9 n.1-4 1949
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
|
