Ethylene, a Regulator of Young Fruit Abscission 12
AUTOR(ES)
Lipe, John A.
RESUMO
In an earlier study we reported that detached cotton flowers produced sufficient ethylene before the period of natural abscission to suggest that ethylene might be a natural regulator of young fruit abscission. The present report explores this probability further. Intact cotton (Gossypium hirsutum L.) fruits produced ethylene at rates as high as 36 μl ethylene/kg fresh wt·hr during the 2 days before they abscised. Direct measurements of ethylene in gas samples withdrawn from fruits indicated that production of 1 μl ethylene/kg fresh wt·hr is equivalent to an internal concentration of approximately 0.1 μl/l. Fumigation of fruiting cotton plants with only 0.5 μl/l caused 100% abscission of young fruits and floral buds within 2 days. This correlated with the estimated endogenous levels of ethylene. Reduced pressure, which reduced the internal levels of ethylene, delayed abscission of young fruits and leaves, a result which supports our conclusion from this study— that ethylene is one of the regulators of young fruit abscission in cotton.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=366380Documentos Relacionados
- Ethylene, Abscission, and Gibberellins
- Ethylene: Role in Fruit Abscission and Dehiscence Processes 12
- Abscission of Citrus Leaf Explants: INTERRELATIONSHIPS OF ABSCISIC ACID, ETHYLENE, AND HYDROLYTIC ENZYMES
- Role of Ethylene in Fruit Ripening 12
- Cherry Fruit Abscission: Evidence for Time of Initiation and the Involvement of Ethylene 1
