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Science 29 November 1991:
Vol. 254. no. 5036, pp. 1364 - 1367
DOI: 10.1126/science.254.5036.1364
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Articles

Viviparous Leaves Produced by Somatic Activation of an Inactive Cytokinin-Synthesizing Gene

JUAN JOSÈ ESTRUCH 1, ELS PRINSEN 2, HARRY VAN ONCKELEN 2, JEFF SCHELL 1, and ANGELO SPENA 1

1 MPI für Züchtungsforschung, Cark-von-Linne weg, 10,5000 Köln 30, Germany
2 UIA, Universiteitsplein, B-2610 Antwerpen (Wilrijk), Belgium

Tobacco plants that are somatic mosaics for expression of a cytokinin-synthesizing gene have viviparous leaves. Such a formation of shoots in an abnormal position represents a significant deviation from the usual organization of the plant body where a central axis produces shoots only in the axils of lateral leaf appendages and according to a precise phyllotactic pattern. This report links vivipary to the expression of a gene whose product is involved in the synthesis of the phytohormone cytokinin.

Submitted on July 8, 1991
Accepted on October 2, 1991


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Science. ISSN 0036-8075 (print), 1095-9203 (online)