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Effects of sucrose supply on growth and paraquat tolerance of the late-flowering gi-3 mutant

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Abstract

Mutations at the GI locus in Arabidopsis are pleiotropic: gi mutants are late-flowering, tolerant to the toxicity of the herbicide paraquat, and have an increased starch content. We tested the effects of exogenous sucrose supply on the level of paraquat tolerance and on growth and development of the gi-3 mutant. Paraquat tolerance was the highest in gi-3 seedlings grown on medium containing 1% sucrose. As expected, all measured growth parameters (root length, fresh weight, anthocyanin, and sucrose content) were influenced by the sucrose dose, but in a number of assays (effect on fresh weight and developmental characteristics) the sucrose-dependent response in gi-3 was heterochronic. Additionally, the late-flowering phenotype of the gi-3 mutant was reverted to wild type after prolonged growth in darkness on sucrose-containing media.

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Author notes

  1. Jasmina Kurepa, Jan Smalle, Marc Van Montagu & Dirk Inzé

    Present address: Department of Horticulture, University of Wisconsin, Madison, WI, 53706-1590, USA)

Authors and Affiliations

  1. Laboratorium voor Genetica, Department of Genetics, Flanders Interuniversity Institute for Biotechnology (VIB), Universiteit Gent, K.L. Ledeganckstraat 35, B-9000, Gent, Belgium

    Jasmina Kurepa, Jan Smalle, Marc Van Montagu & Dirk Inzé

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  1. Jasmina Kurepa
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  2. Jan Smalle
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  3. Marc Van Montagu
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  4. Dirk Inzé
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Kurepa, J., Smalle, J., Van Montagu, M. et al. Effects of sucrose supply on growth and paraquat tolerance of the late-flowering gi-3 mutant. Plant Growth Regulation 26, 91–96 (1998). https://doi.org/10.1023/A:1006043914056

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  • DOI: https://doi.org/10.1023/A:1006043914056

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