| Registro completo |
| Provedor de dados: |
Planta Daninha
|
| País: |
Brazil
|
| Título: |
Eletrolite leakage as a technique to diagnose euphorbia heterophylla biotypes resistant to ppo-inhibitors herbicides
|
| Autores: |
Trezzi,M.M
Vidal,R.A
Kruse,N.D
Gustman,M.S
Xavier,E
Rosin,D
Dedordi,G.F
|
| Data: |
2011-09-01
|
| Ano: |
2011
|
| Palavras-chave: |
Cell disruption
Electrical conductivity
Herbicide absorption
Resistance mechanism
Wild poinsettia
|
| Resumo: |
The action of herbicides that affect the integrity of cell membranes and cause leakage, like PPO-inhibitors, can be detected by measuring the electric conductivity (EC) of a solution in which the plant tissue target is incubated in the presence of herbicide. The objectives of this work were to confirm PPO resistance in a new Euphorbia heterophylla (EPHHL) biotype, and to compare the electrolyte leakage from R and S to PPO-inhibitors biotypes, using two different methods of incubation in a solution containing herbicides. One experiment was carried in greenhouse and three in laboratory, with a completely randomized design. In the greenhouse experiment, four biotypes of EPHHL were sprayed with seven rates of fomesafen to confirm resistance in suspected biotypes. Leaf disks from R and S EPHHL biotypes in the second and the third experiments and entire leaves in the fourth experiment were incubated in a solution containing PPO-inhibitors to subsequently determine EC of solution. The study confirmed the resistance to PPO-inhibitors in two EPHHL biotypes. There were no significant differences between S and R biotypes in the experiments with the incubation of leaf disks, but incubation of entire leaves of EPHHL S biotype showed higher EC when in a solution with fomesafen, in comparison to the R biotype. The results of this work are an indirect evidence that resistance to PPO-inhibitors is related to lower absorption of herbicide by the shoots and also to some kind of mechanism to cope with oxidative stress.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000300020
|
| Editor: |
Sociedade Brasileira da Ciência das Plantas Daninhas
|
| Relação: |
10.1590/S0100-83582011000300020
|
| Formato: |
text/html
|
| Fonte: |
Planta Daninha v.29 n.3 2011
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
