A novel non-symbiotic hemoglobin from oak: Roles in root signalling and development?
Claire Parent1, Audrey Berger, Nicolas Capelli
1Laboratoire de Chrono-Environnerment; UMR UFC/CNRS 6249 USC INRA; Université de Franche-Comté; France.
Abstract:
The cellular and molecular adaptations of non-model woody species to environmental changes are still poorly understood. We have cloned and characterised a novel non-symbiotic hemoglobin from oak roots (QpHb1) which exhibits a specific cellular distribution in the root. The QpHb1 gene is strongly expressed in the protoderm and the protoxylem cells in two Quercus species (Q. petraea and Q. robur) with contrasting adaptive potential to drought and flooding. The constitutive expression of QpHb1 in both oak species in specific root tissues combined with the reported presence of nitric oxide in the same tissues and its potential for protein S-nitrosylation could support a role for non-symbiotic hemoglobins in signalling changes in the root environment and/or in controlling some aspects of root development.
Related Concept Videos
Role of Hematopoietic Growth Factors
Thrombopoietin (TPO), mainly released by the liver,...
Cell Signaling in Plants
Hemoglobin
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
Meristems and Plant Growth
Primary and Secondary Growth in Roots and Shoots
Hedgehog Signaling Pathway


