Abscission | Zendy

Lyle E. Craker | Zendy; Arthur V. Chadwick | Zendy; Gerald R. Leather | Zendy

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Abscission

Author(s) -

Lyle E. Craker,

Arthur V. Chadwick,

Gerald R. Leather

Publication year - 1970

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.46.6.790

Subject(s) - abscission , phaseolus , explant culture , indole 3 acetic acid , acetic acid , indole test , chemistry , botany , biochemistry , biology , auxin , in vitro , gene

A 1-hour application of indole-3-acetic acid to bean (Phaseolus vulgaris L. cv. Red Kidney) explants inhibited abscission for an 8-hour aging period. Use of indole-3-acetic acid-(14)C showed that the applied indole-3-acetic acid was conjugated within explant tissue and that this conjugation mechanism accounts for loss of effectiveness of indole-3-acetic acid in inhibiting abscission after 8 hours. Reapplication of indole-3-acetic acid to an explant at a later time, before the induced aging requirement was completed reinhibited abscission. 2,4-Dichlorophenoxyacetic acid, which is not destroyed or conjugated by this system, did not lose its ability to inhibit abscission. It was concluded that indole-3-acetic acid destruction is one of the processes involved in the aging stage of abscission in explants.

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