Atriplex is one of good adaptive plants to the Characteristics of drought fragile
environments, and it has high ability to tolerate many ecological stresses such as drought
and high temperature and salinity.
The plant is characterized by its huge
economic values because it has many uses, it’s
one of the high digestibility grazing plants and it is grazing by camels, goats and sheep all
the year, some of them have medicinally uses in repairing the increasing of blood sugar,
the freshness parts of some species use in preparing salads, even they have cook using, and
leaves usually have a salty taste even the plant grow in none salinity soils.
The morphological variety of four species of Atriplex were studying, two of them are
introduced (A. canescens, A. polycarpa) and two have natural spreading in Syria
(A. leucoclada, A. halimus).
The results indicated that biological type, life duration, plants color, fruit bracts
shape and fused of fruit bracts, plant smell, seed color, leaves shape and phyllotaxy are
considered the most morphological characters which show important morphological
differences among the studying species. These can be considered among classification
standards to help distinguish the studying species of Atriplex genus under their natural
spreading land, which consider the natural habitat for this important plant. Based on
studied morphological characters, an identification key for the studying species is
provided.
This study was carried out at the Faculty of Agriculture, Damascus
University, and ACSAD during the year 2001 – 2002 in order to assess the
genetic variability of twenty wheat genotypes for osmotic stress tolerance by
using PEG-6000 as a water str
ess induced tool. This trial aimed to develop
a semi-natural rapid and effective screening technique in which the optimum
induction as well as lethal levels of osmotic stress are well defined .
The results revealed that the treatments –0.4 MPa and –1.5 MPa were the
optimum induction and lethal levels of osmotic stress, respectively.