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

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Science  29 Nov 1991:
Vol. 254, Issue 5036, pp. 1364-1367
DOI: 10.1126/science.254.5036.1364


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.

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