The lack of information about the cultivation of coriander plant in Syria prompted us
to study the effect of four plant densities (33.33،10، 13.33 and 20 plant/m2)، and four levels
of phosphate fertilization (0107.2،160.8، and 214.4 of Superphospha
te 46%) on some
productive and quality traits of the coriander plant. This study was carried out in Tartous
province during the growing season 2014، using Randomized Complete Block design with
a Split Plot arrangement of treatments. The Results revealed that there were significant
differences between the treatments for the whole traits، in addition to a significant
interaction between density and phosphate fertilization. Although the densities (10، 13.33
and 20 plant/m2) varied in their effect، they had superiority upon the
control(33،33)plant/m2، and the density 10 plant/m2 had more important effect in terms of
increasing each of: branches number/plant، seed weight/plant، seeds number/inflorescence،
protein content in plants and seeds and beta carotene and chlorophyll. However، the level
160.8k.g/h of P2O5 increased the number of inflorescences/plant، number of fruits/plant
and seed weight/ inflorescence.
The research aimed to compare the phenological, morphological and
biochemical characterestics of plain and curly-leafed parsley hybrids. The
hybrids were similar in germination percentage and leave number as well as in
the content of NO3. Signific
ant differences were observed in leaf area of plain
and curly-leafed hybrid (21.23 vs. 10.87 cm2), stem length (11.68 vs. 5.42 cm),
fresh (56.8 vs. 31.95 g) and dry weight (4 and 1.92 g, respectively). Comparing
to plain-leafed, the curly-leafed hybrid had a twice thicker stem, higher
chlorophyll, carotene and vitamin C contents (37,45, and 14.61%, respectively).
This study was conducted at the laboratories of Horticultural Department, Faculty
of Agriculture, Damascus University to determine the effect of using three levels of
sucrose (10, 30, 50 g /l) on chlorophyll content between healthy and vitrified pl
ants of
three varieties of Gypsophylla panicolata (Golantwo, Planshnet, Newlove). Results
showed superiority of treatment 10 g / l sucrose in reducing vitrification percent to
36.78% compared with 62.57% for control (30 g/l) and with significant differences
between varieties. Planshnet was the best variety in chlorophyll content either in healthy
or in vitrified plantlets. Moreover, the treatment with sucrose of 10 g/l caused significant
increment of chlorophyll content compared with other treatments. The high total
chlorophyll content was 17.46 micrograms/ ml in healthy plants compared with 14.26
micrograms / ml in vitrification plants for Planshnet at 10 g/l sucrose.
During the season of 2002, samples of olive fruit were taken (Ashrasi type)
from Ninavah horticulture’s station that belongs to the ministry of agriculture
in Iraq. The purpose of this research is to study some physical and chemical
characteristic
s during the growing period, from July until October. Those
characteristics include moisture, ash, oil content, chlorophyll A & B, protein,
pH and carbohydrate, In addition to fruit length, size, weight, radius, and
rigidity. The results showed significant increase in moisture, oil, weight, size
and length of the fruit were studied. Significant reduction was noticed in the
percentages of the protein, carbohydrate, ash and the fruit rigidity. The highest
values of chlorophyll were observed during The month of September. October
considered as the best time to harvest olive fruits for pickle purpose.
The study was conducted during 2017 in the laboratories of the department of Botany
at Tishreen University, Lattakia, Syria. The effect of ultraviolet radiation (UV-C and UVB)
for different periods (0.5, 1, 3, 5, 15, 15, 30, 45, 60 minutes) on the
photosynthetic
pigments of Euglena gracilis (with three stages of measurements) was studied. The results
showed that chlorophyll pigments were more sensitive to UV-C compared to UV-B. These
reductions were correlated with the increase in the exposure time, reaching the lowest
value after 60 minutes exposure (97.83, 98.73, 99.18% for chlorophyll a, chlorophyll b and
carotenoids when measured after 24 hours respectively).
The polyethylene films protect the chlorophyll pigments against UV radiation.
The protection rate was more evident against UV-C reaching .7.7% after 24 hours in the
algae exposed for 30 minutes according to the experimental conditions.
The research was conducted to study the resistance of Nerium plant which are planting on
sides of roads and the cities portals. The research was performed by studying the leaves of
Nerium plant, through studying the length and weigh of the leaf, an
d its area and water
content. In addition to studying the wools and hiatus and chlorophyll concentration, and
compared the results between the polluted region which is the entry of Banias City, and the
control one which is the gardens of Tishreen University.
Results showed non significant reduction in length, weight and area of the leaf in the
polluted region compared with the control one. It attained (16.2 cm, 0.97 g and 26.3 cm2),
respectively in the polluted region. Where it was (17.8 cm, 1.25 g and 27.7 cm2), for
control region, respectively. Also, there was no significant differences in water content
between the two studied regions. It attained respectively (52.2 and 53.9 %).
Our results showed:
- That a number of hiatus decreased, whereas the wools increased in the polluted region
compared with control region insignificantly. The mean of a number of it was 12 in
polluted region, compared with 14 in the control region.
- A simple insignificant reduction in the concentration of chlorophyll A in polluted region
compared with the control, where it attained (0.93 and 0.98), respectively.
The Nerium oleander plant was resistance and tolerance to the air pollution.
