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Register a new userEffect of salt stress on some fruit qualities of two tomato hybrids
تأثير الإجهاد الملحي في بعض الصفات النوعية لثمار هجينين من البندورة
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صفاء نجلا( باحث )
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على الرغم من أنَّها أحد أسباب انخفاض الإنتاج، تعد الملوحة أداة لتحسين نوعية الإنتاج في بعـض الهجن. في هذا البحث، طبق الإجهاد الملحي على هجينين من البندورة (Marmara وBonaparte) من خلال زيادة قيمة الناقلية الكهربائية لمياه الري من 4 إلى 13 m/ds ، من مرحلة الورقة الحقيقة الثالثـة إلى نهاية النمو. على الرغم من أن الإجهاد الملحي أدى إلى انخفاض في وزن الثمار الناتجة فـي كـلا الهجينين، لكنه ساعد على تحسين بعض الصفات الكيميائية و الفيزيائية المتعلقة بجـودة الثمـرة. إذْ أدت الملوحة إلى زيادة محتوى المواد الصلبة الذائبة في الثمرة في كلا الهجينين. و في الوقت الذي لـم يـؤثر فيه الإجهاد الملحي في محتوى ثمار الهجين Bonapart من الليكوبين، لوحظ ازدياد هذا المؤشر بمقدار مرتين في الهجين Marmara .أما بالنسبة إلى تلون الثمار، فقد تفوق الهجين Bonaparte في كل من مؤشري اللون*a و*b على الهجين Marmara الـذي تفـوق بـدوره علـى الهجـين Bonaparte بالمؤشر*L . علماً أن الإجهاد الملحي لم يؤثر معنوياً في هذه المؤشرات بكلا الهجينين.
Despite being one of the reasons of production decline, salinity is still a tool 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.
Artificial intelligence review:
Research summary
تناولت الدراسة تأثير الإجهاد الملحي على بعض الصفات النوعية لثمار هجينين من البندورة (Marmara و Bonaparte) من خلال زيادة الناقلية الكهربائية لمياه الري من 4 إلى 13 ds/m. أظهرت النتائج أن الإجهاد الملحي أدى إلى انخفاض وزن الثمار في كلا الهجينين، ولكنه ساهم في تحسين بعض الصفات الكيميائية والفيزيائية المتعلقة بجودة الثمار. زادت الملوحة من محتوى المواد الصلبة الذائبة في الثمار لكلا الهجينين، ولم تؤثر على محتوى الليكوبين في Bonaparte بينما زاد بمقدار مرتين في Marmara. تفوق الهجين Bonaparte في مؤشري اللون *a و *b، بينما تفوق Marmara في المؤشر *L. لم يؤثر الإجهاد الملحي بشكل معنوي على مؤشرات اللون في كلا الهجينين.
Critical review
دراسة نقدية: الدراسة قدمت معلومات قيمة حول تأثير الإجهاد الملحي على جودة ثمار البندورة، ولكن هناك بعض النقاط التي يمكن تحسينها. على سبيل المثال، كان من الأفضل توسيع نطاق الدراسة لتشمل هجن أخرى من البندورة لمعرفة ما إذا كانت النتائج متسقة عبر أنواع مختلفة. كما أن الدراسة لم تتناول تأثير الملوحة على الجوانب الاقتصادية للإنتاج الزراعي، وهو جانب مهم يجب مراعاته. بالإضافة إلى ذلك، كان من الممكن تقديم تحليل أعمق للآليات البيوكيميائية التي تؤدي إلى التغيرات الملحوظة في جودة الثمار تحت تأثير الإجهاد الملحي.
Questions related to the research
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ما هو الهدف الرئيسي من الدراسة؟
الهدف الرئيسي من الدراسة هو دراسة تأثير الناقلية الكهربائية لمياه الري على بعض صفات جودة ثمار البندورة، ومقارنة مدى استجابة الهجن المختلفة لتغيرات الناقلية الكهربائية لمياه الري.
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ما هي الهجن التي تم دراستها في البحث؟
تم دراسة هجينين من البندورة هما Marmara و Bonaparte.
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كيف أثر الإجهاد الملحي على محتوى الليكوبين في الهجينين؟
الإجهاد الملحي لم يؤثر على محتوى الليكوبين في هجين Bonaparte، بينما زاد محتوى الليكوبين بمقدار مرتين في هجين Marmara.
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ما هي المؤشرات اللونية التي تم قياسها في الدراسة؟
تم قياس مؤشرات اللون *a و *b و *L في الدراسة.
References used
Adams, P. 1991. Effects of increasing the salinity of the nutrient solution with major nutrients or sodium chloride on the yield, quality and composition of tomatoes grown in rock- wool. J. Hort. Sci., 66: 201–207
Atherton, J. G. and J. Rudish. 1986. The tomato crop. In: Fruit ripening and quality. Chapman and Hall, London. Pp: 348-349
Barrett, D. M. and G. E. Anthon. 2008. Color Quality of tomato products, American Chemical Society. Davis, California. Pp: 131−139
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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, resp
ectively. 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.
The research was conducted on some olive
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physiological traits. Different concentrations of salt as well as to
the control (fresh water) were used in this experiment.
In this study, the effect of different concentrations of sodium chloride
(NaCl) (0, 50, 100, 150 mM) on some physiological characteristics and some
growth indicators of SO4 grape rootstock propagated in vitro was studied at the
laboratories of Gen
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(GCSAR), Damascus/Syria. Results indicated that the increase of NaCl
concentration up to 100 mM in culture medium led to reduce the growth
indicators (survival plants, average of the plant length and average number of
buds) with significant differences when compared with the control plants after
4 weeks from culturing on multiplication media, while treatment with 150 mM
of sodium chloride led to death of all plants. Using the concentrations 50 and
100 mM of NaCl also caused decreasing the total chlorophyll content in the
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The experiment was carried out during spring season 2016 to study the effect
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distilled water, on growth of three hybrids of tomatoes at two different levels of
irrigation
(100 and 50 % of field capacity). Three sprays were conducted started
from flowering with two weeks’ interval. The results showed that ‘Finenss’ hybrid
had significant differences in plant height, branches per plant and leaves number per
plant. ‘Hadeer’ hybrid had superiority in dry matter ratio and content of chlorophyll
in leaves. Reducing the level of irrigation resulted in a significant decrease in
plant height, total branches number, versus an increase in the leaves number per
plant, total leaves area and the percentage of dry matter. The results showed that
the treatment with Tecamin flower led to a significant increase in all indicators
studied. The interaction treatments shoed that Hadeer hybrid irrigated in level 50
% and spraying of nutrient solution (Tecamin flower) had a significant increase in
dry matter ratio and chlorophyll content in leaves. While the hybrid Finenss which
irrigated in level 100 % with nutrient solution (Tecamin flower) had a significant
increase in leaves number per plant and total leaves area.
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Commission for Scientific Agriculture Researches (G.C.S.A.R.) Damascus,
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Narrow sense heritability and genetic advance were low in most of the traits
due to the dominance of non-additive gene action in controlling the genetic
variation of the most studied traits and this predict low to medium values of
genetic advance through selection process.
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