Characterization of environmental stress responses during early development of Pringlea antiscorbutica in the field at Kerguelen - Archive ouverte HAL
Article Dans Une Revue New Phytologist Année : 2004

Characterization of environmental stress responses during early development of Pringlea antiscorbutica in the field at Kerguelen

Frédéric Quemmerais
  • Fonction : Auteur
Gwenola Gouesbet
Abdelhak El Amrani
Yves Frenot
  • Fonction : Auteur
Françoise Hennion
Ivan Couée

Résumé

Early development of Kerguelen cabbage (Pringlea antiscorbutica) was studied in the Kerguelen archipelago, its natural habitat, and under laboratory conditions. Polyamines, which are involved in developmental processes and responses to stress in several plant species, were used as markers of physiological status of P. antiscorbutica seedlings. Analysis under laboratory conditions of responses to low water availability and to salinity enabled identification of major environmental constraints restricting seedling development in the subantarctic region. Salt stress was found to modify polyamine distribution between seedling organs, in controlled experiments and in the field, thus indicating that polyamine responses to salt stress were functional in the field at Kerguelen. By contrast, exposure to low water availability induced different polyamine responses in controlled experiments and in the field. The present work thus shows that, under certain conditions, polyamine concentrations can be used as a marker of specific stress responses of seedlings in the field. Discrepancies are discussed in terms of growth conditions in the laboratory and of combined stresses in natural habitats.

Dates et versions

hal-03366393 , version 1 (07-10-2021)

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Citer

Irène Hummel, Frédéric Quemmerais, Gwenola Gouesbet, Abdelhak El Amrani, Yves Frenot, et al.. Characterization of environmental stress responses during early development of Pringlea antiscorbutica in the field at Kerguelen. New Phytologist, 2004, 162 (3), pp.705-715. ⟨10.1111/j.1469-8137.2004.01062.x⟩. ⟨hal-03366393⟩

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