Induction of Leaf Abscission in Cotton Is a Common Effect of Urea- and Adenine-Type Cytokinins | Zendy

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Induction of Leaf Abscission in Cotton Is a Common Effect of Urea- and Adenine-Type Cytokinins

Author(s) -

Klaus Großmann

Publication year - 1991

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.95.1.234

Subject(s) - abscission , kinetin , thidiazuron , cytokinin , zeatin , urea , ethylene , malvaceae , botany , biology , gossypium hirsutum , chemistry , horticulture , auxin , in vitro , biochemistry , tissue culture , micropropagation , gene , catalysis

Cytokinins of the urea and adenine type induced leaf abscission in young cotton (Gossypium hirsutum) plants in the following order of activity: N-phenyl-N'-1,2,3-thiadiazol-5-ylurea (thidiazuron) >> N-phenyl-N'-(2-chloro-4-pyridyl)urea > isopentenyladenine >/= 6-benzyladenine > zeatin = dihydrozeatin > kinetin. It is suggested that ethylene production is implicated in this response because it was stimulated by the compounds in cotton leaf discs with nearly the same effectiveness. Moreover, similar to thidiazuron (JC Suttle [1985] Plant Physiol 78: 272-276), isopentenyladenine-induced defoliation was inhibited by aminoethoxyvinylglycine, and the effect was restored by 1-aminocyclopropane-1-carboxylic acid.

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