Abstract
We investigated the effects of prolonged hypoxia on the sugar uptake in tomato (Solanum lycopersicum L. var. MP-1) roots. Hydroponic cultures of whole tomato plants were submitted to hypoxic treatment for 1 week, and the roots were analyzed for sugar concentrations, hexose uptake and hexose transporter expression level. Contrary to what has been observed after anoxic shock or short-term hypoxic treatment, we show that sugar concentrations increase and hexose uptake is up-regulated in the roots after 1 week of hypoxic treatment. Increased hexose transport is concomitant with the induction of the hexose transporter gene LeHT2. These responses may be due either to a direct effect of low O2 supply, or to a secondary effect associated with the increase in sugar concentrations, which, typically, develops in most hypoxic plants.
Abbreviations
- HT:
-
Hexose transporter
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Acknowledgments
This work was supported by the French Institut National de la Recherche Agronomique and by the Comité Mixte Franco-Tunisien pour la Coopération Universitaire (Grant No. 03G0209). We are sincerely grateful to the referees for their thorough reading of the manuscript, and pertinent suggestions to improve the original manuscript. We also thank Julie Hopkins for language correction.
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Gharbi, I., Ricard, B., Smiti, S. et al. Increased hexose transport in the roots of tomato plants submitted to prolonged hypoxia. Planta 230, 441–448 (2009). https://doi.org/10.1007/s00425-009-0941-3
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DOI: https://doi.org/10.1007/s00425-009-0941-3