دراسة التنوع الحيوي لطحالب الفوقسيات Fucophyceae وتحديد الكتلة الحيوية والتركيب البيوكيميائي لبعض الأنواع ذات الأهمية الاقتصادية والطبية على شاطئ اللاذقية
The effect of different concentrations of nitrate and phosphate and soil extract on the
total growth and chemical composition to the green algae Chorella vulgaris isolated from
some localaquatic habitats had studied in this research, at three type
of temperature (30 ,
25, 20), the maximum total growth reached up to 4.66 Cell/h and the lowest duplicated
time was 1.55 h at temperature 25ºC and at concentration of nitrate 1 g/L , 0.05 g/L of
phosphate, and 10/100 mL of soil solution , while the number of cells reached to 59423,61
cell/mL at the day 22 of cultivation.
The chemical composition differed by the changing of temperature and nutrient
medium composition , while the maximum protein content reached to 48.36 % at the
maximum concentration of nutrients and 25 ºC of temperature , the maximal concentration
of lipid was 19,78 % at temperature 25ºC and concentration of nitrate 0.1 g/L and 0.01 of
phosphate and 6/100 mL of soil solution , the concentration of carbohydrates were the
lowest where the maximal ratio was 17.41 % at temperature 20ºC .
The effect of different concentrations of phosphate and nitrate and soil extracted on
the isolated growth isolation of Scendesmus acutus which is isolated from some local
aquatic areas has tested in this research, the number of cells and growth ran
ge and
duplicated time of all algal cultures among thirty five days has counted.
The highest growth range was 3.90 by using a mixture of the three solutions in
concentrations (1g/l nitrate + 0.05g/l phosphate + 10 ml / 100 of soil solution), the numbers
of cells reached to 8861.11 in the twenty fourth day of culture, and in the lowest duplicated
time 10.85, whereas the highest growth range was by using soil solution alone 2.86 and the
lowest duplicated time 2.13 at concentration 16/100ml, whereas the growth range
decreased and duplicated time increased by using nitrate and phosphate solution all by its
own, while the highest growth range reached to 2.13 and 1.76 and lowest duplicated time
3.39 and 4.11 in order.
In this study we isolated chlorella vulgaris alage from some water
areas , and test effect some conditions (light intensity,Nitrat and
phosphate concentrations ,solution soil) on its Growth Range and
Duplicated time the cells.
This study was achieved through Mars 2011 until February 2012 the samples collected monthly from Baksa dam from different four location which differenced each other with chemical and physical qualities.
We could in these study classified 132 speci
es of phytoplankton distributed as 59 species belong to chrysophyta, 40 species of chlorophyta and 28 species of cyanophyta , 5 species of Euglenophyta.
Physical and chemicalanalyzing ofBaksa waters showed the difference of values between studding regions, The concentration of Nitrate ions ranged between 17.7 mg/l at third location and 0.3 mg/l at second location, The highest rate to Phosphate ions was 18.8 mg/l and the less was 0.01mg/l, and it was noticed the difference in these values in the same region with the difference of period of time.
The diversity and distribution of studied phytoplankton correlated with the environmental factors.
It was noticed The abundance of cyanophytain the water of third location which near to the sewage channels which is suitable environment to these group of phytoplankton.
أشير إلى وجود أحد الطحالب السمراء المعروف بتوزعه في البحـار الاسـتوائية علـى الـشاطئ
السوري قرب اللاذقية و هو البادينا رباعية الطبقات، الذي يعد نوعاً جديداً بالنسبة للبحر المتوسط. و قـد
درست العينات السورية بالتفصيل نظراً للاختلافات المورفولوجية و
التشريحية التي ذكرها الباحثون الذين
تناولوا دراسة هذا النوع تبعاً للبيئة، و التوزع الجغرافي للعينات المدروسة، و قدمت النتائج المتعلقة بذلك.
النبات قليل التكلس مؤلف من مجموعة من القطع الصفيحية يتراوح طولها بين 8-16 سم و عرضها
بين 5.0-3 سم، و هي تتألف من أربع طبقات خلوية عموماً. أما أعضاء التكاثر فتقع مباشرة قرب خطوط
الأشعار السطحية على الوجه الخارجي للنبات، و تكون أكياس الأبواغ عارية. النباتات العروسية ثنائيـة
المسكن و الأكياس العروسية الأنثوية محاطة بغشاء جامع .
و أخيراً أعطيت بعض المعلومات عن بيئة النبات المدروس و المجتمعات النباتية البحرية التـي ينمـو
فيها، و توزعه الجغرافي بين مداري الجدي و السرطان.
We screening for antimicrobial substances production from marine algae of
Syria. We presented results of ١٦ algal species tested by their lipide and
aqueous extracts agaimst Gram’s negative and positive bacteria, as well as one
fungous species.
T
he lipide not aqueous extracts were the active against Gram’s positive
bacteria especially.
No effect founded on the fongous species. In addition we make comparative
viewing with other studies on other mediterranean contries regarding the same
species of algae tested.
