Inhibitory effect of jasmonic acid and ethylene on epicotyl growth and bud induction in the maritime pine, Pinus pinaster Soland. in Ait
Biocell
;
33(3): 141-148, Dec. 2009. graf, tab
Article
Dans Anglais
| LILACS
| ID: lil-595018
ABSTRACT
Two independent parameters, epicotyl height (cm) and number of induced buds were studied on Pinus pinaster explants to analyse the effects of three phytohormones (6-benzylaminopurine, jasmonic acid, ethylene) which were combined or not in 11 different treatments. Epicotyle length diminished significantly in relation to the control medium (medium without exogen phytohormones) in presence of jasmonic acid, 6-benzylaminopurine or Ethephon (which is converted to ethylene in plants) in any of treatments. Concentrations of 100 microM of jasmonic acid and Ethephon had a greater inhibitory effect than the treatments with 10 microM. In addition to that, jasmonic acid was a stronger inhibitor than Ethephon in any of the tried combinations. There were no significant differences between the control treatment and the treatment s with only 10 microM of jasmonic acid or Ethephon. However, 10 microM 6-benzylaminopurine induced bud formation. The different combinations of 6-benzylaminopurine with jasmonic acid and Ethephon showed that concentrations of 10 to 100 microM did not affect the number of induced buds. Jasmonic acid had an inhibitory effect which Ethephon only showed when combined with 100 microM of jasmonic acid and 10 microM of 6-benzylaminopurine. Three response groups were defined by cluster analysis:
group 1 produced the greatest mean number of buds (4 to 5) and a mean epicotyl growth of 1 to 1.5 cm; group 2 produced 2 to 4 buds and a mean growth of 0.5 to 1.2 cm; group 3 produced only one bud and a mean epicotyl length of 1.2 to 2 cm.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Composés organiques du phosphore
/
Purines
/
Composés benzyliques
/
Cyclopentanes
/
Éthylènes
langue:
Anglais
Texte intégral:
Biocell
Thème du journal:
Clulas
Année:
2009
Type:
Article
Pays d'affiliation:
Argentine
/
Espagne
Institution/Pays d'affiliation:
Instituto Tecnológico Agrario de Castilla y León/ES
/
Universidad Nacional de San Luis/AR
/
Universidad de Valladolid/ES
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