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Register a new userThe effect of calcium addition on fruit chemical composition of some tomato cultivars grown under salt stress
تأثير إضافة الكالسيوم في التركيب الكيمائي لثمار عدة أصناف من البندورة المعرضة لإجهاد ملحي
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Tishreen University ورقة بحثية
Publication date
2013
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العربية
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طبق الإجهاد الملحي على ثلاثة أصناف مختلفة الحجم من البندورة (Picolino و Levovil و Marmara) من خلال زيادة ناقلية مياه الري الكهربائية من 3 (الشاهد) إلى6.7dS/m (معاملة Na فقط و Na+Ca)، منذ مرحلة الورقة الحقيقية الثالثة إلى نهاية النمو. أدى الإجهاد الملحي لزيادة معنوية في محتوى ثمار Marmara و Picolino من فيتامين C(20.94 و 29.28مغ/100غ) مقارنة مع الشاهد (16.62 و 24.22مغ/100غ، على التوالي)، بينما لم يكن معنوياً في الصنف Levovil. كذلك ازدادت الحموضة الكلية معنوياً بنسبة 17% في Marmara و Picolino، بينما لم تؤثر في Levovil. ازداد محتوى الثمار المجهدة معنوياً من الفركتوز بمقدار 1.7 و 1.4 مرة مقارنة مع الشاهد (11.13 و 18.8 غ/كغ) في Levovil و Picolino، على التوالي. انخفض محتوى الثمار من الآزوت في Levovil و Picolino عند تعريضها للإجهاد الملحي، بنسبة 33 و 58% بالمقارنة مع الشاهد (0.12 و 0.19%)، على التوالي، لكن إضافة الكالسيوم عدلت هذا التأثير بشكل معنوي. كما ازداد محتوى الثمار معنوياً من P في Levovil و Picolino تحت تأثير الإجهاد، و لم تحدث المعاملة بالكالسيوم تغيراً يذكر. أدى الإجهاد الملحي لانخفاض معنوي في محتوى الثمار من البوتاسيوم في Levovil و Picolino فوصل إلى 0.22% و 0.26%، على التوالي، بالمقارنة مع الشاهد (0.27% و 0.29%، على التوالي)، بينما أدت إضافة الكالسيوم لتعديل تأثير الإجهاد الملحي. ظهرت زيادة معنوية في محتوى الثمار من الكالسيوم تحت الإجهاد في Marmara و Picolino و انخفاض معنوي في Levovil مقارنة مع الشاهد، بينما لم تؤثر إضافة الكالسيوم في هذا المعيار.
A salt stress was applied from 3rd leaf stage until the maturation on three tomato cultivars (Marmara, Levovil and Picolino). The salt stress was achieved by increasing the solution EC from 3 (control) to 6.7 dS/m for, Na and Na+Ca treatments, respectively. The stress induced a significant increase in vitamin C of Marmara and Levovil fruit content (20.94 and 23.03 mg/100g) as compared to the control (16.62 and 19.43 mg/100g, respectively). The titratable acidity was increased significantly (17%) only in Marmara and Picolino. The fruit content of fructose was increased in Levovil and Picolino by 1.4 and 1.7 folds, respectively, as compared to control (11.13 and 18.8g/kg, respectively). While the content of N in Levovil and Picolino was decreased, under stress, by 33 and 58% as compared to the control (0.12 and 0.19%), respectively, the P content was increased. The salt stress decreased the K content in Levovil and Picolino to reach to 0.22 and 0.26% as compared to control (0.27 and 0.29%), respectively. The calcium addition modified the stress impact. A significant increase, was registered in Ca content under stress in Marmara andPicolino as compared to control, while the calcium addition did have any effect on.
References used
ADAMS, P.; HOLDER, R. Effects of humidity, Ca and salinity on the accumulation of dry matter and Ca by the leaves and fruit of tomat(Lycopersiconesculentum). J. Hort. Sci., 67, (1992), 137–142
AL-KARAKI, G.N. Growth, water use efficiency, and sodium and potassiumacquisition by tomato cultivars grown under salt stress. J. Plant Nutr., 23, (2000), 1–8
Amerine, M.A. and Ough C.S. Methods for analysis of musts and wines. John Wiley and Sons, New York, (1980), pp 341
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to improve production quality in some hybrids. this research was conducted at
the Faculty of Agriculture, University of Damascus during 2012 season. A salt
stress was
applied on two tomato hybrids, Bonaparte and Marmara by
increasing the value of the electrical conductivity of irrigating water from 4 to
13 ds / m, at the stage of the third true leaf to the end of growth of the two
tomato plants.
Results indicated that salt stress led to a reduction in the fruit weight of
both hybrids but it helped in improving some chemical and physical
characteristics relating to fruit quality, such as increasing the fruit content of
soluble solids in both hybrids. Salt stress did not affect the lycopene content of
fruits in Bonapart, but it was increased by 2 folds inMarmara. Some fruit color
indices (a* and b*) were greater in Bonaparte while L* indice was higher in
Marmara. However, the color indices of fruits were not affected by salinity in
both hybrids studied.
The study was excuted in Latakia governorate during the period (2014-2015). In this
study, it has been used three cultivars of Eriobotrya japonica which were Seedawi,
Morocan and Municipal). Onfigurable characterization, the average fruit weight ca
lculation
and the average number of seeds have been done of the fruit. Some chemical analysis were
also conducted of the juice. The data has been statistical analyzed and the results showed
that the earliest cultivar in maturity was Municipal. The highest rate of average fruit s
weight was (53.40g) in Morocan cultivar. And the fruits shapes were between the oval
shape in the Morocan and Seedawi cultivar, and circular shape in the Municipal cultivar.
The Morocan and Seedawi cultivars have the supremacy in production quantity(34.67-34
kg/tree) respectively at the Municipal. The highest proportion was in vitamin C, the acidity
and sugars were (0.977,1.073,15.20 %) respectively in municipal cultivar.
This research was conducted at Izraa research station of The General
Commission for Scientific Agricultural Research during the growing season
2010/2011 to study the performance of six durum wheat varieties at early
growth stage under water defici
t stress. The experiment was designed using
randomized complete block design with three replication. The statistical
analysis results of the experiment clearly showed genetic variations among
cultivars under water stress. Drought stress caused a depression in all studied
traits. Mean yield decreased in average 31.7 %. The number of spiks/ m2 was
the most trait affected by drought stress, It decreased in average 29.1% while
biological yield decreased in average 24.26%. It was observed that the number
of spikes per m2 was the highest in the variety Hourani (191) and the highest
number of grain per spike (34.1) whereas the variety Bohouth7 and the variety
hourani recorded the highest thousand grain weight (40.5 g). The statistical
analysis results showed that the variety Cha5 a achieved the highest grain yield
per m2 (239.4 g), whereas, the variety Bohouth7 recorded the lowest grain yield
per m2 (182.8 g), under water deficit stress conditions.
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 .
An experiment was conducted in a greenhouse growing tomato plant in sand nutrient
culture with variable ratios of Ca:Mg and potassium in the nutrient solution. The aim was
to evaluate productivity parameters and marketable fruit production. The exp
eriment
consisted of four Ca:Mg ratios (4:6, 5:5, 7.5:2.5, and 10:0.5 mM/L-1), along with three K
concentrations 0.5, 3, and 4.5 mM/L-1 in the nutrient solution. There were 12 treatment
each has three replicates.
In spite of the increase in weight and volume of fruits with increasing Ca:Mg ratios and
potassium concentrations, the increase in fruit number on the plant with increasing Ca:Mg
ratio to (5:5) and 6 mM K has the main effect on plant productivity and marketable fruits.
In this treatment plants produced 49 fruit/plant resulted from 5 fruit punches. Most of the
physiological disorder symptoms spread on fruits was blotchy shoulders, which was
associated directly with low potassium concentration in the growth medium, which
negatively influenced the marketable fruit production.
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