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Register a new userThe Effect of Gebbrillin GA٣ on the Growth of the Root System and the Mitotic Index of the Wheat and Barley
تأثير الجيبريللين GA٣ في نمو الجملة الجذرية و الشدة الانقسامية عند نباتات القمح و الشعير
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Damascus University ورقة بحثية
Publication date
2001
fields
Biology
and research's language is
العربية
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Shamra Editor
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يهدف البحث إلى دراسة تأثير مركبات الجيبريللين، و تحديدًا GA٣, على نسبة إنبات بذور القمح و الشعير، و ذلك بتراكيز و أزمنة مختلفة، و في نمو الخلية الجذرية، و كذلك في الانقسام الخلوي في نهايات الجذور المدروسة. و قد لوحظ من خلال النتائج التي تم الوصول إليها أن لهذه المركبات تأثيرًا واضحًا في نسبة الإنبات، و ذلك ضمن التراكيز المنخفضة نسبيًا، كما لها دور معاكس في التراكيز العالية نسبيًا. أما فيما يتعلق بنمو الجذور فقد تطابقت النتائج مع نتائج الإنبات و لوحظ فارق واضح في استجابة كل من القمح و الشعير للتراكيز المختلفة من GA3. أما فيما يتعلق بالشدة الانقسامية فلم تلحظ فوارق جوهرية بالمقارنة مع الشاهد.
This research aims to study the effect of Gebbrilin compounds, specially GA٣, on the percentage of germination of seeds in different concentrations and duration, Also the effect of this compound on the growth of the root cells and so on the cellular division. It was observed from the results that these compounds had an evident effect on the degree of germination within the low concentration, but it has an opposition effect in the high concentrations. The results concerning the growth of the roots are analogous to those of the germination results. An obvious difference was in the reaction of wheat and barley to the different concentrations of GA٣. For the mitotic index no differences were observed compared to the control.
References used
Anton Lang. ١٩٧٠. Gibbrellins structure and metabolism. An Rev. Plant Physiology vol. ٢١ pp
Jacob. ١٩٨٧. Lehrbuch der Botanik. Gustar Fischer Verlag Jena
Libbert, E. ١٩٨٧. Lehrbuch der pflanzen physiologie. ٤. Auflage. Gustav Fischer Verlag Jena
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The experiment was carried out in agricultural season (2015-2016) in
Zahid local for field agricultur in Tartous to study the effect of different
systems of tillage (zero tillage, plowing of the chisel plow, moldboard
plowing and disc plowing ) on
the growth and productivity of rainfed
barley, the land was cultivated in the first half of November with barley
varieties (Hordeum sp ) and used randomized complete design 7
treatments with 3 replicates were used with L.S.D test at 5% level.
The roots of durum and bread wheat were treated with ٠,٢٪, ٠,٤٪, ٠,٨٪ and
١,٢٪ of the herbicide (٢،٤ - D + MCPA) for ٥, ١٠, ١٥ and ٢٠ hours. As the
period of treatment increased, the effect on mitotic rate and mitotic phases was
increased; this wa
s indicated by the correlation coefficient. Durum wheat gave
higher correlation coefficient. Chromosomal aberrations were noted during
anaphase as a result of the treatment with ٠,٢٪ concentration. Mitosis was fully
blocked and various genetical aberrations were observed as, multinuclei,
separation of DNA pieces and distraction of genetical material appeared at
higher concentration.
The research was carried out during (2008-2009) and (2009-2010) in Fedio farm belonging to the Faculty of Agriculture to study the effect of various systems of tillage on the growth and productivity of Barley.
The results showed that the bulk densit
y increases with the first tillage system (control), comparing with the other tillage systems, but all of them were less than the control (no- tillage). The number of weeds increased when using the 6-th tillage system. The germination rate was affected by the tillage systems. The 6-th tillage system was the best. The weight of 1000 seeds and productivity increased by the 1-th tillage system (no-tillage) comparing with the other tillage systems. The number of weeds increased, but germination rate and weight of 1000 seeds decreased by using the 6-th tillage system. The yield of barley increased when using the 6-th tillage system. No-tillage system was the most economic compared with the others.
The aim of research was to study the impact of price policy on the economic
return of soft and durum wheat and barley farmers in Al-Hassakah
governorate to determine the extent of government intervention in supporting
the prices of these crops. Sc
ales of nominal protection and effective coefficients
were used to analyze the actual difference between domestic prices and global
prices of product, and the net impact of the policy on output and input. A total
of 208 farmers from 44 villages were selected on the basis of simple class
sample. Results of the analysis showed that the values of nominal protection
and effective protection coefficients for soft and durum wheat and barley
amounted 1.08, 1.21, 1.97, and 1.17, 1.33, 2.26 respectively, Thus, a clear
government intervention was observed to support crop prices and the overall
effect of the policy indicated a positive incentive for soft and durum wheat
price with higher subsidies for barley price through year 2011.
The effect of different levels(5,7.5 and 10 ml/L) of EM1 on potato growth and
productivity was studied, using complete randomized design with 4 treatments.
Potato plant (cv.spunta) were grown in nursery garden of tishreen university 2016.
The resu
lts showed that foliar spray of potato plants with EM1 had a positive effect
on studied parameters .
Spraying plants with 10 ml/L of EM1 gave a significant increase in leaf area, plant
high, number and weight of tubers and total yield.
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