<b>Manihot leaf abscission induced by ethrel

Leaf Abscission Induced by the Iodide Ion.

In the course of biological screening for herbicidal activity in synthetic compounds, various organic iodide complexes had marked defoliating properties when applied to leguminous test plants. Simple iodides such as the salts of alkali metals also caused defoliation. Although this effect has been reported in the patent literature (4, 8), our present investigation was undertaken principally to l...

Ethylene-induced Leaf Abscission Is Promoted by Gibberellic Acid.

Gibberellic acid (GA(3)) promoted leaf abscission from cotton (Gossypium hirsutum L.) plants exposed to ethylene. With mature plants, only the rate of abscission was increased, but when vegetative plants were exposed to ethylene for 4 days or less, the amount of abscission was increased markedly. Promotion of abscission occurred at near saturating ethylene levels (10 mul/liter), over a wide ran...

Regulation of Ethylene Evolution and Leaf Abscission by Auxin.

Many physiological processes have shown art,.lowith a neck to accommodate a 25 mm diameter Sgous responses to both auxin and ethylene. These rubber vaccine cap. The gas collection bottles were processes include root initiation, intumescence formathen sealed and incubated at 21'; etiolated tissue was tion, epinasty (9), fruit ripening (3, 12), floral placed in the dark and green tissue in 150 ft...

Effects of some salts and acids on citrus leaf abscission

Abscission of citrus leaf explants: no correlation with naphthaleneacetic Acid conjugation in the abscission zone.

The role of alpha-naphthaleneacetic acid (NAA) in the control of abscission in Citrus (Citrus sinensis L. Osbeck) leaf explants and its conjugation were studied in non-aged and 24-hour-aged explants. Dipping non-aged explants in 1.5 micromolar NAA for 15 minutes immediately after excision did not delay abscission whereas 150 micromolar NAA effectively delayed it. As incubation time was prolonge...