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Register a new userChanges in oxidative parameters and antioxidant systems during tomato fruit growth
تغير معايير الأكسدة و الأنظمة المضادة للأكسدة في أثناء نمو ثمار البندورة
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رمزي مرشد( باحث )
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أجريت الدراسة في مخابر قسم علوم البستنة، كلية الزراعة، جامعة دمشق بهدف قيـاس التغيـرات الحاصلة في معايير الأكسدة و الأنظمة المضادة للأكسدة أثناء تطور نمو البندورة. تـم اسـتخدام محتـوى الثمار من بيروكسيد الهيدروجين (H2O2) و مقدار تأكسد ليبيدات الجدر الخلويـة (MDA) كمؤشـرات لمستوى عملية الأكسدة. أشارت النتائج إلى انخفاض في محتوى الثمار من H2O2 خـلال طـور النمـو و ارتفع بمقدار ضئيل خلال طور النضج، في حين ازداد محتوى الثمار من MDA في نهاية طور النـضج فقط. لوحظ أيضاً حصول تغير في نشاط الإنزيمات المضادة للأكسدة (SOD ،CAT و APX) في أثنـاء نمو الثمار، إذْ ازداد نشاط SOD و APX أثناء طور النمو في حـين ازداد نـشاط CAT أثنـاء طـور النضج. كذلك ازداد محتوى الثمار من الأسكوربات (AsA) أثناء نمو الثمار. تؤكد التغيرات الحاصلة فـي الأنظمة المضادة للأكسدة الإنزيمية و غير الإنزيمية الدور المهم الذي تؤديه هذه الأنظمة في أثناء مراحـل نمو ثمار البندورة.
This study was investigated at the laboratories of Horticultural department, Faculty of Agriculture, Damascus University to measure the changes in oxidative and antioxidative parameters during tomato fruit growth. Hydrogen peroxide (H2O2) and lipid peroxidation (MDA) contents were analysed as indicators of oxidative processes. Results showed that H2O2 content decreased during fruit growth phase and slightly increased during ripening, meanwhile MDA content was found to increase only at the end of fruit ripening. The activities of antioxidant enzymes (SOD, APX, CAT) were modified during fruit growth. Activities of SOD, APX increased during fruit growth phase, meanwhile CAT activity increased during fruit maturation. The level of ascorbate increased during fruit growth. These changes in antioxidant metabolites and enzymes establish that the antioxidant system plays an important role in the both phases of tomato fruit growth.
References used
Agrawal, R., P. Parihar, B.L. Mandhyan, and D.K. Jain. 2002. Physicochemical changes during ripening of guava fruit (Psidiumguajava L.). Journal of food science and technology 39: 94-95
Bradford, M. M. 1976. A rapid and sensitive method for the quantitation of micrograms quantities of protein utilizing the principle of protein–dye binding. Anal. Biochem. 72: 248–254
Horemans, N., C. H. Foyer, and H. Asard. 2000. Transport and action of ascorbate at the plasma membrane. Trends Plant Sci. 5: 263–266
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نفذ البحث خلال الفترة 2013-2016 م في كلية الزراعة بجامعة دمشق , بهدف دراسة تأثير المعاملة ببعض المواد الكيميائية والطبيعية ( 1- ميثيل سكلو بروبان , ونتروبروسيد الصوديوم , الشيتوزان , وأمينوفينل علايسين , والميثيل جاسمونات , وفيتامين E ) في القدرة الت
خزينية لثمار البندورة ( الهجين Tala ) وصفاتها البيوكيميائية ( نسبة المواد الصلبة الذائبة TSS ونسبة الحموضة القاتلة للمعايرة TA ) والفيزيائية ( الصلابة ونسبة الفقد بالوزن والفقد المطلق ومؤشرات اللون ) ومعايير الأكسدة ومضادات الأكسدة .
This study aimed at studying the effect of using three species of
bacteria (PGPR) Azotobacter chroococcum Bacillus megaterium and
Frateuria aurantia in three inoculation manner ( seeds, shoots &
seed+shoots) on suppressed the effect of Cucumber mo
saic virus
(CMV) on tomato plants (pots), Some growth parameters such as plant
height, number of leaves on plant, foliage fresh weight, root fresh
weight were observed after 60 days. The experiment carried out in
2016 in a greenhouse in Tartus.
Serum levels of vitamins E and C were measured in 15 patients with Osteoarthritis
( OA ) and those patients received Magnesium 10mg /kg /day for
two weeks ,and 15 healthy subjects as a control group
Patients were classified into subgroups ,those w
ith OA according to
disease activity and /or sevirety .
استخدام مياه الصرف الصحي المعالجة في نمو وانتاج البندورة المحمية
التحاليل الكيميائية والقياسات الفيزيائية.
التحليل الاحصائي
العناصر الغذائية
تصميم الترجمة.
مياه الصرف الصحي المعالجة.
The experiment was carried out during2013-2014 Miaar Shaker village (Tartous) to determine the best method of irrigation on growth and productivity of Tomato plant in plastic green-house. Three method of irrigation were used in the experiment :(furro
w surface , surface drip and subsurface drip irrigation). Growth of plants, productivity and fruit quality were studies.
The results showed that surface and subsurface drip irrigation give more plant growth (leaves number and leaves area) more flowering and fruit production as compared with furrow irrigation method .The leaves number and leaves area in plant with surface drip irrigation was 31.49 leaves and 17078/plant while these number reached only to 22.91 leaves and 7057.86/plant in the furrow irrigation with significant difference . The productivity of plants was also higher in surface drip irrigation method(4.75 kg/ plant) without significant difference as compared with subsurface irrigation method and with significant difference as compared with furrow irrigation method (3.95 kg/ plant). The quality of fruits was better in surface drip irrigation (8.28% dry material ,5.02% TSS and 28.23mg vitamin c /100g) in fresh matter while these number were 7.18%, 4.98% and 20.96 mg/100g in furrow .
The irrigation method haven't affect in the: plant length ,and acidity percentage.
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