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Viviparousleaves produced by somatic activation of an inactive cytokininsynthesizing gene. Estruch JJ, Prinson E, Van Onckelen H et al. Science . 1991
[22]
Cytokinin/auxin ratio and morpholo- gy of shoots and tissue transformed by a chmiric isopentenyltransferase gene. Smigoki AC, Owens LD. Plant Physiology . 1989