Abscission of Citrus Leaf Explants | Zendy

Judith Wurzburger | Zendy; R. Gören | Zendy

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Abscission of Citrus Leaf Explants

Author(s) -

Judith Wurzburger,

R. Gören

Publication year - 1978

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.62.2.295

Subject(s) - abscission , explant culture , petiole (insect anatomy) , citrus × sinensis , horticulture , botany , incubation , chemistry , biology , in vitro , orange (colour) , biochemistry , hymenoptera

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 prolonged up to 24 hours after excision, the delaying effect of both concentrations gradually increased. In general, both concentrations did not delay abscission when applied to 24-hour-aged explants held for an additional period of up to 24 hours. The uptake and conjugation of (14)C-NAA to glucose and aspartic acid were similar in petiole, abscission zone, and leaf blade of non-aged and aged tissues, for all NAA concentrations. No correlation was established between the kinetics of abscission and the rate of conjugation in the abscission zone.

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