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Sugar effects on early seedling development in Arabidopsis

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Abstract

Sugars affect a broad variety of processes, from growth and development to gene expression. Although it has already been shown that sugars act as signaling molecules, little is known about the mechanisms by which plants respond to them. Much progress has been made on understanding sugar sensing and signaling thanks to the analysis of mutants with abnormal sugar response. Some of the genetic strategies applied are based on the inhibitory effect of sugar on post-germinative development of Arabidopsis thaliana. High concentrations of exogenous sugars delay germination and arrest early growth, preventing seedlings from expanding cotyledons and developing true leaves and an extensive root system. The characterization of several Arabidopsis mutants identified for their altered sugar sensitivity has disclosed a network in which sugars and plant hormones cooperate to control seedling development. Remarkably, many mutations turned out to be novel alleles of hormone-related genes, mainly ABA and ethylene. The aspects described above, emphasizing the connections between sugar and plant hormones revealed by mutants derived in seedling-based screens, are reviewed in this paper.

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Authors and Affiliations

  1. Department of Agricultural Sciences, University of Modena and Reggio Emilia, via Kennedy 17, Reggio Emilia, 42100, Italy

    Sara Rognoni & Laura Arru

  2. National Center for Gene Research, Chinese Academy of Sciences, 500 Cao Bao Road, Shanghai, 200233, P.R. China

    Sheng Teng

  3. Molecular Plant Physiology, University of Utrecht, Padualaan 8, Utrecht, 3584CH, The Netherlands

    Sjef C. M. Smeekens

  4. Plant and Crop Physiology Laboratory, Scuola Superiore Sant’Anna, Via Mariscoglio 34, Pisa, 56124, Italy

    Pierdomenico Perata

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  1. Sara Rognoni
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Rognoni, S., Teng, S., Arru, L. et al. Sugar effects on early seedling development in Arabidopsis. Plant Growth Regul 52, 217–228 (2007). https://doi.org/10.1007/s10725-007-9193-z

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