期刊
NEW PHYTOLOGIST
卷 162, 期 3, 页码 705-715出版社
WILEY
DOI: 10.1111/j.1469-8137.2004.01062.x
关键词
Kerguelen cabbage (Pringlea antiscorbutica); polyamines; salt stress; drought; seedling development; root; environmental stress; climatic change
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据