The present research was conducted to study the resistance of Acasia tree which were
near to Banias- Jableh freeway. This study was performed by study the stomata and its
distribution on the upper and down leaf surfaces.
Also, a concentration of c
hlorophyll and a severity of photosynthesis, then compared
the results between the polluted region with the control one.
Results showed that a number of stomata decreased in polluted region compared to
the control one, where this reduction play a role in reduce the injury resulting from gas air
pollutants, and this reflexes on the severity of photosynthesis and the chlorophyll.
Five species of Poaceae were collected: Briza minor L., Briza
maxima L., Setaria viridis (L.) P.B., Setaria verticillata (L.)
P.B., and Eleusine indica Gaertn., Fruct. Sem. Pl. which
recorded for the first time in the Flora of Syria. Peels from
a
daxial and abaxial leaf surfaces were prepared and stained
with the safranin . The results showed a clearly differences in
these sides: existence or absence of the epidermal elements,
their shapes and their measurements among the species from
one side, and between adaxial and abaxial leaf surface for the
same one from the other side.
The results of studying of histological structure of leaf and stem , stomata
patterns, the shape and size of stomata and the shape of epidermis cells and its
walls between some of hypericum genus spceis (family clusiaceae), show that
there are rel
evant anatomical differences among the studied species, which can
be considered as taxonomical criteria for distinguishing the studied species of
Hypericum genus from each other.
