Journal Article

Combined Effects of Auxin Transport Inhibitors and Cytokinin: Alterations of Organ Development in Tobacco

Timothy J. Strabala, Yan H. Wu and Yi Li

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 37, issue 8, pages 1177-1182
Published in print December 1996 | ISSN: 0032-0781
e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/oxfordjournals.pcp.a029069
Combined Effects of Auxin Transport Inhibitors and Cytokinin: Alterations of Organ Development in Tobacco

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We have examined the effects of the auxin transport inhibitors 1-naphthylphthalamic acid (NPA) and 2,3,5-triiodobenzoic acid (TIBA) on leaf morphogenesis of transgenic Nicotiana tabacum (cv. Xanthi) plants expressing the Agrobacterium tumefaciens cytokinin biosynthetic gene, ipt. We have observed the formation of saucer-shaped leaf-like organs at the shoot apex and at lateral buds. The formation of apical saucer-shaped leaf-like organs can be duplicated by the application of exogenous NPA and cytokinin to wild-type tobacco seedlings. We have also observed adventitious leaf-like organs with altered petiole and blade morphology in the transgenic plants treated with auxin transport inhibitors. These results suggest that the combination of diminished auxin transport and elevated cytokinin can lead to alterations in leaf development in tobacco.

Keywords: Agrobacterium tumefaciens; Auxin transport inhibitors; Cytokinin; Leaf development; Nicotiana tabacum; SAUR promoter-ipt plants

Journal Article.  0 words. 

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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