This research was carried out in five sites varied in altitude representing Mediterranean vegetation zones of western slopes of Lattakia Mountains during 2010 - 2011 on Quercus infectoria Oliv species. Research shows that significant difference of al
titude above sea level has obvious effect on seed germination in different sites. This is noticed in characteristics related to fruit weight, germination rate value sum, and height of vegetal and rooty seedling after four months of germination. Altitude above sea level has no effect on the branchlet number of rooty and vegetal sum height of seedlings as well as mean of leaves number of seedlings. According to germination ratio and daily germination ratio, in addition to seedling diameter, there is harmony among all sites. It can be deduced that there are changes in growth traits of studied seedlings in different sites. This is the primary indication of the impact of the altitude above sea level on seedling traits of Quercus infectoria Oliv.
This study was carried out in nine sites of various altitudes. The sites represent
scattered zones of Cordia myxa Forsk. as an introduced species in the coastal region,
Lattakia governorate during 2010-2011. The research showed that there is an eff
ect of
altitude on the investigated trees in the different sites, and that there were significant
differences in relation to the characteristics of the average of the following: tree height,
length of leaf stalk, catkin length, canopy, fresh and dry leaf weight, and fruit weight.
However, there were no effects of altitude on the species. There were also no observed
significant differences in relation to the characteristics of the average of the following: the
tree diameter, trunk length, flower number in one catkin, leaf length, leaf width, leaf area,
leaf humidity percentage, flowering start, and flowering period. It can be said that there
were changes in the morphological characteristics of the studied trees in the different sites,
which appeared to be a preliminary indication of the impact of altitude on the variations of
some morphological characteristics of Cordia myxa Forsk.
This study aimed at investigating the effect of some environmental factors on the phenolic
contents of the Rhus cotinus L. plant. Plant samples (leaves, flowers and bark) were
collected from three aspects (south, west and north) at four altitudes (
0-300, 300-600, 600-
900, ˃900m) in the countryside of Jableh in 2016. The fresh samples were extracted using
95% ethanol as an extraction solution, then the total contents of the phenolic compounds
were determined spectrophotometrically using the Folin-Ciocalteu reagent, expressing the
result by (mg gallic acid/1g fw) using a Spectrophotometer.
