Development of periderm in root of extreme xerophte Ammopitanthus mongolicum

摘要

Ammopiptanthus mongolicus of Leguminosae is both a unique evergreen shrub and ancient epibiotic species in deserts of China. The species is distributed mainly in the region 105-107°E and 39-41°N. The habitat is rigorous and arid, water table level isxommonly 5m. The botany, physiology of the species have been deal with. The study was made to observe the process of periderm development.