The present investigation was carried out at the nursery of Agricultural faculty- Tishreen
University, during 2016-2017, to evaluate the best organic culture medium for the seedling
production of Zinnia (Zinnia elegans) and Stock (Matthiolaincana)
with the lowest costs.
Seven different mediums were experimented (Turf, waste mushroom compost, farm waste
compost and their combinations).
The results showed some differences in chemical and physical characters of experimented
mediums. This differences had an impact on germination parameters (seed germination
percentage, speed of germination, daily germination) and seedling quality (seedling length,
collar diameter, fresh and dray weight, percentage of dray matter).
The results indicated the mediums consisting of turf (T1), waste mushroom compost with
turf (T6) and waste mushroom compost with farm waste compost (T7) gave the best
germination rate and the highest quality of seedling.
Data showed as well that T3 and T7 treatments realized the lowest costs and higher
economic profit than other treatments.
This research was carried out during two seasons 2014 – 2015 to study effect of seed
coats on germination of endocarp, seed and embryos of two wild genotypes (M1, M2) of
Mahaleb rootstock (Prunus mahaleb L.) prevailing in Alhaffa area, Lattakia. Th
e
experiments were done at Lattakia Scientific Agricultural Research center and Faculty of
Agriculture at Tishreen University.
The Results of the seeds planted on agar 0.7% in dark at 15 C° showed that no
germination of the M1 endocarp VS late and low germination at 10% for the M2 endocarp
starting after 98 days. As for seeds, the germination was (66.66%) and (53.33%) for M1
and M2, respectively. Removal of the woody coat (endocarp) and seed coat makes the
germination faster. the embryos germination was (80%) and (60%) for M1 and M2,
respectively.
The effect of different culture medias (water, MS solid, MS 1/2 solid) on germination
and growth of heliotropiun hirsutissimum Grauer. in vitro was studied with different
concentrations of gibberellic acid (0.001-0.01-0.1 and 1 mg/l).
The results
showed that best germination rate (80.5%) and root (20mm) and shoot
(35mm) growth were obtained in MS solid medium with 0.1mg/l GA3.
Addition of 0.1mg/l GA3 to MS1/2 solid medium improved germination rate
(75.44%), root (19mm), and shoot (24mm)growth.
When GA3 (0.1 mg/l) was added to water medium, germination rate reached
(65.33%), as well as root and shoot growth (12.66mm and20mm) alternatively after 2
weeks of planting.
Seedling of MS solid medium were transferred into pots contained torp medium to
adapting them with outside environment, and then surviving their growth until maturity
after 4 weeks.
The research was conducted in the ornamental plants laboratory, Faculty of
Agriculture, to determine the best seed germination conditions of Sophora japonica and S.
secundiflora. Different seed pre-treatments (cold ater (6oC) and warm water (50oC)
immersing, Citric acid (2%) and Sulphoric acid (25, 50%) stratification) were
experimented. The effect of different culture mediums and sowing times were also
investigated.
The results indicated that the chemical pre-treatments represented the highest relative
germination rates compared to the physical pre-tretments. Among the physical pretreatment,
the seed immersed in hot water for 2h showed the highest germination
percentage (38,6 – 30%) for S. japonica and S. secundiflora respectively. While, the seed
treated with sulphoric acid represented the best germination percentage for the tow species
(58,3 – 63,6%). Nevertheless, the increase of the sulphoric acid concentration had a
negative impact on survival plantlet rates for the tow species, specially for S. japonica.
The results showed that the seed sowing in sand with soil and organic mature (1:1:1)
medium realized the best germination percentage for the tow studied species.
تعد شجرة اللوز من الاشجار الهامة والمتميزة اقتصاديا في سوريا لأنها تعتبر الموطن الأصلي لشجرة اللوز . الشجرة متوسطة حساسة لدرجات الحرارة المنخفضة ولا تتحمل الرطوبة الزائدة لذلك تزرع في مناطق محددة من العالم
The objective of this study is to compare the effect of five different Nacl
concentration (0,50,100,150,200 mM) on seeds germination and seedling growth of two
cultivars of soybean (sb-44,sb-172).
Seeds were germinated in petri dishes with sterile
filter paper moistened with 10 ml
of test solution at 25 c˚ in dark .
The obtained results showed that germination percentage , length of root and
hypocotyl were decreased with the increase of the Nacl concentration in the medium. The
best values was from cultivar sb-44 .
After seven days of incubation , significant differences were observed between
control and treated seeds .
Germinated seeds were subcultured on basal Murashige and Skoog medium solid at
the same Nacl concentration . The roots growth was mor affected by 200 mM Nacl
compared to seedling growth .
Plantlets were transfered into pots with nutrient soil , irrigated with saline water and
were adapted at laboratory . we obtained good plants grew to maturity in 10- 12 weeks .
The objective of this study is to compare the effect of five different Nacl concentration (0,50,100,150,200 mM) on seeds germination and seedling growth of two cultivars of soybean (sb-44,sb-172).
Seeds were germinated in petri dishes with sterile
filter paper moistened with 10 ml of test solution at 25 c˚ in dark .
The obtained results showed that germination percentage , length of root and hypocotyl were decreased with the increase of the Nacl concentration in the medium. The best values was from cultivar sb-44 .
After seven days of incubation , significant differences were observed between control and treated seeds .
Germinated seeds were subcultured on basal Murashige and Skoog medium solid at the same Nacl concentration . The roots growth was mor affected by 200 mM Nacl compared to seedling growth .
Plantlets were transfered into pots with nutrient soil , irrigated with saline water and were adapted at laboratory . we obtained good plants grew to maturity in 10- 12 weeks .
The aime of this study was to isolate and identify the seed borne fungi of two
varieties of Soybean, Sb172 and Sb44, using blotter method and P.D.A plate method.
21 species belong 10 genus were determined, saprophyte and pathogen Fungi.
P.D.A plat
e method showed the highest number of fungi in comparison with the
other method, and the fungus Aspergillus was the most frequent genus with a ratio of
44.2% for the variety sb172 and 45.14% for the variety sb44, followed by the fungus
Cladosporium and then Fusarium, whereas the genus Colletotrichum showed the lowest
frequent ratio (0.85%) with the variety Sb172.
The percentages of seeds germination and infection were differed between the two
varieties, and the ratio seeds germination of variety sb172 were higher than the variety
sb44 with the both methods of culture, and were equal 94% with prim variety and 92%
with the second ones by blotter method, whereas the ratio were 52% and 34% for both
varieties respectively by P.D.A plate method. However, the ratio of infection were, in
general, lower with prim variety than the second ones by the both method.
The results showed the seeds which were highest ratio infection appeared low ratio
germination .
A total of /13/ fungal species belonging to /10/ genera
have been obtained from nine samples of sunflower seeds. The
isolation was on potato dextrose agar media and blotter paper with tow treatments (surface-sterilized seeds- seeds without
sterili
zation). The species were Aspergillus flavus ; A. niger ; A.
fumigatus ; ؛Alternaria alternate ; Fusarium solani; F. moniliforme ; Macrophomina phaseolina ; Mucor racemosus ; Penicillium chrysogenum ; Rhizopus stolonifer ; Trichotheium rosum ; Rhizoctonia solani and Absidia ramosae . The most prevalent species was Aspergillus flavus with percent frequency 100% and 55-77% for Alternaria alternata. The percentage of seeds germination was between (0-77%) on PDA media and (20-81%) on BP, and it was low in the non-sterile seeds treatment. The moisture content of the seeds was between (7.4-13%), and there is no correlation (R2=0.06) between the percentage of the infected seeds and its moisture content.
أجري البحث في مخبر الاعشاب الضارة ومزرعة أبو جرش ودائرة المكافحة الحيوية للاعشاب في مركز بحوث ودراسات المكافحة الحيوية والبيت الشبكي
