Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userEvaluation the Response of Some Local Barley (Hordeum vulgare L.) Varieties to PEG - Induced Osmotic Stress at Early Growth Stage
تقييم استجابة بعض أصناف الشعير المحلية لتحمل الإجهاد الحلولي في مرحلة النمو الأولي
1152
1 25
0
(
0
)
Added by
Damascus University ورقة بحثية
Publication date
2005
fields
Field Crops
and research's language is
العربية
Created by
Shamra Editor
Ask ChatGPT about the research
نفذت دراسة مخبرية في كلية الزراعة، جامعة دمشق، خلال العام 2002-2003 بهدف إيجاد تقانة غربلة مخبرية سريعة و فعالة في سبر التباين الوراثي لاستجابة بعض أصناف الشعير المحلية للإجهاد الحلولي المصطنع باستخدام سكر البولي إيثيلين جلايكول (PEG-6000) في مرحلة النمو الأولي، و تقييم أهمية التعريض المسبق لمستويات غير مميتة (محرضة) من الإجهاد الحلولي في تحسين قدرة البادرات على تحمل المستويات المميتة من الإجهاد الحلولي، فضلا عن دراسة أثر طبيعة التحريض (ملحي أو حلولي) في استجابة البادرات المحرضة للمستوى المميت من الإجهاد الحلولي.
A laboratory experiment was conducted during 2002-003. The purpose was to develop an effective and rapid screening tool to assess the genetic variability for the response of some local barley varieties to polyethylene glycol- induced osmotic stress at early growth stage. Also this will help to evaluate the relevance of pre-exposure of barley seedlings to sub-lethal (induction) levels of osmotic stress. This might enhance the capacity of seedlings to tolerate the lethal levels of stress.
References used
Ouda, A. (1999). Genetic variability in temperature and moisture stress tolerance in sunflower hybrids: An assessment based on physiological and biochemical parameters. Ph. D. thesis submitted to Crop Physiology Department, U. A. S., Bangalore, India
Amzallag, G. N.; Lerner, H.R. and Poljakoff-Mayber, A. (1990). Induction of increased salt tolerance in sorghum bicolor by NaCl pretreatment. J. Exp. Bot., 41:29-34
Antoniw, J. F.; Ritter, C. E.; Pierpoint, W. S. and Van Loon, L. C. (1980). Comparison of three pathogenesis related proteins from plants of two ciltivars of tobacco infected with TMV. J. Gen. Virol., 47: 79
rate research
Read More
Laboratory experiment was conducted in the laboratories of field
crops department, Faculty of Agriculture, Damascus University,
during the year 2011, in order to screen some lentils genotypes to
osmotic stress at seedling stage.
Different experiments were conducted under laboratory conditions, at the
Faculty of Agriculture – Damascus University, in order to develop a suitable
and efficient screening tool, which can be applied to assess the genetic
variability among 20 sor
ghum genotypes (Izraa series) for high salt stress
tolerance.
We were able to develop a screening technique involves pre- exposing
sorghum seedlings to a sub – lethal level of salinity stress (induction stress) (150
mM NaCl) for 16 hrs which can induce the genotypes to prepare defensive
means, which may differ according to the genetic potentiality of each genotype.
These protective responses may help the genotype to endure the lethal level of
salinity stress (400 mM NaCl) for 48 hrs. At a later stage, the seedlings were
transferred to distilled water for 72 hrs and the rate of recovery growth was
taken as a criterion to select the highly salt tolerant genotypes by using Zdistribution
analysis.
Results revealed that genotypes such as: Izraa 10, Izraa 15, and Izraa 18
could be classified as salt tolerant genotypes which showed higher recovery
growth and the least growth reduction over the control. Whereas a genotype
such as Izraa 22 was grouped as salt sensitive one where the percent growth
reduction over the control was greater, indicating that this genotype has low
recovery growth ability.
Our results suggest that the proposed screening technique is rapid, effective,
and match the natural screening.
In this study, five barley cultivars (Arabi Abiad, improved Arabi Abiad,
Arabi Aswad, Furat 1, Furat 2) from the harvest of 1999 season were used .The
chemical composition, Amino acid content, B-Glucan content, viscosity, cell
wall compounds, and
metabolic energy were determined in two laboratories in
Germany .A metabolism trial was also conducted to study the nitrogen balance,
dry matter, Organic matter, ash, and some other productivity parameters.
Results showed that the influence of barley varieties on chemical composition of
the grains was clearly visible. The crude protein content ranged from 138 for
Furat 1 to 169 gr/Kg dry matter for Arabi Abiad. The difference in starch
content resulted in differences in metabolic energy Values from 12.4 for Furat 1
to 13.3 MJ/Kg dry matter for Arabi Aswad. The food assimilation trial showed
that the varieties Arabi Aswad gave the best productivity parameters, and the
crude protein content did not adversely affect the nitrogen balance in all the
barley varieties meald, but it was the lowest for the Arabi Aswad variety meal
(p <0.05). There were no significant differences in dry matter and organic
matter digestibility for diets containing Arabi Abiad, Furat 1 and Furat 2.
This study was carried out at the Faculty of Agriculture, Damascus
University, and ACSAD during the year 2001 – 2002 in order to assess the
genetic variability of twenty wheat genotypes for osmotic stress tolerance by
using PEG-6000 as a water str
ess induced tool. This trial aimed to develop
a semi-natural rapid and effective screening technique in which the optimum
induction as well as lethal levels of osmotic stress are well defined .
The results revealed that the treatments –0.4 MPa and –1.5 MPa were the
optimum induction and lethal levels of osmotic stress, respectively.
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.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
