Cold-Triggered Induction of ROS- and Raffinose Metabolism in Freezing-Sensitive Taproot Tissue of Sugar Beet

• DOI: 10.3389/fpls.2021.715767
• Publication Date: 2021-09-04T10:55:02Z
• Authors: Isabel Keller; Christina Müdsam; C. Martins Rodrigues; Dominik Kischka; Wolfgang Zierer; Uwe Sonnewald; Karsten Harms; Olaf Czarnecki; Karin Fiedler-Wie...; Wolfgang Koch; H. Ekkehard Neuhaus; Frank Ludewig; Benjamin Pommerrenig
• Keywords: Taproot; Pith

Sugar beet ( Beta vulgaris subsp. ) is the exclusive source of sugar in form sucrose temperate climate zones. grown there as an annual crop from spring to autumn because damaging effect freezing temperatures taproot tissue. A collection hybrid and non-hybrid cultivars was tested for winter survival rates tolerance. Three genotypes with either low or high were selected detailed study their response frost. These differed severity frost injury a defined inner region upper part taproot, so-called pith. We aimed elucidate genotype- tissue-dependent molecular processes during combined analyses anatomy physiology transcriptomic metabolite profiles leaf tissues at temperatures. Freezing induced strong downregulation photosynthesis leaves, generation reactive oxygen species (ROS), ROS-related gene expression taproots. Simultaneously, genes involved raffinose metabolism, well concentrations its intermediates, increased markedly both tissue The accumulation pith correlated tolerance three genotypes. discuss protective role precursors against damage