scholarly journals Physiological and Biochemical Response of Winter Wheat (Triticum Aestivum L.) to Ambient O3 and the Antiozonant Chemical Ethylenediurea (EDU) in Jeddah, Saudi Arabia

2018 ◽  
Vol 11 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Laila A. Baqasi ◽  
Huda A. Qari ◽  
Ibrahim A. Hassan
Keyword(s):  
Triticum Aestivum ◽  
Stomatal Conductance ◽  
Growth Yield ◽  
Growing Season ◽  
Triticum Aestivum L ◽  
Field Conditions ◽  
Growth And Yield ◽  
Photosynthetic Rates ◽  
Promising Tool ◽  
Physiological And Biochemical

This study was to conducted to investigate the use of ethylenediurea (EDU) as a possible tool to evaluate O3 effects on wheat (Triticum aestivum L.) plants under field conditions in Jeddah. Wheat plants were expsoed to ambient O3 (AA) and the antiozonant chemical ethylenediurea (EDU) in closed fumigation chambers for the full growing season. Growth, yield and physiology were determined in response to O3 and/or EDU. EDU-treated plants had higher photosynthetic rates (24%) and stomatal conductance (25%), which were reflected in higher growth and yield in terms of number of grains. The present study revealed that EDU could be used as a promising tool to mitigate damaging effects of O3 on under field conditions. EDU protected wheat plants leading to increases in photosynthetic rates, growth and yield.

scholarly journals Effects of Low Concentrations of Ozone (O3) on Metabolic and Physiological Attributes in Wheat (Triticum aestivum L.) Pants

2018 ◽  
Vol 11 (2) ◽  
pp. 929-934 ◽  
Author(s):  
Laila A. Baqasi ◽  
Huda A. Qari ◽  
Nihal Al-Nahhas ◽  
Reem H. Badr ◽  
Wafaa K. Taia ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Amino Acid ◽  
Stomatal Conductance ◽  
Protein Content ◽  
Stomatal Closure ◽  
Growth Yield ◽  
Ambient Air ◽  
Triticum Aestivum L ◽  
Growth And Yield ◽  
Photosynthetic Rates

Growth, yield, protein content, net photosynthetic rates, stomatal conductance and amino acid profiles were determined in wheat (Triticum aestivum L) plants in response to 50 ppb O3 during the growing season. This concentration is similar to the concentrations of O3 in ambient air. O3 decreased photosynthetic rates (24%) and stomatal conductance (25%), which were reflected in lower growth and yield in terms of number of grains and 100 grain weight. Scanning electron microscopy showed a collapse in the epidermal cells adjacent to stomata that led to stomatal closure and consequently reductions in stomatal conductance. The significance of O3-induced impairment of growth, yield and alteration in amino acid contents are discussed. To the best of our knowledge, this is the first study reporting impact of ozone on protein content, amino acids and yield of wheat in Saudi Arabia.

UPTAKE AND DISSIPATION OF TRIALLATE AND TRIFLURALIN VAPORS BY WHEAT UNDER FIELD CONDITIONS

1988 ◽  
Vol 68 (4) ◽  
pp. 1153-1157 ◽  
Author(s):  
A. J. CESSNA ◽  
R. GROVER ◽  
A. E. SMITH ◽  
J. H. HUNTER
Keyword(s):  
Triticum Aestivum ◽  
Growing Season ◽  
Triticum Aestivum L ◽  
Field Conditions ◽  
Treated Soil ◽  
Leaf Stage

The uptake and dissipation of triallate and trifluralin in the shoots of wheat (Triticum aestivum L.) grown in treated soil were monitored over a growing season. Maximum concentrations of both herbicides, detected at the four-leaf stage of the wheat, were 35.2 ± 5.8 and 10.5 ± 1.4 μg kg−1 for triallate and trifluralin, respectively. Residues had decreased by the six-leaf stage and then, because of continuous uptake of vapor by the crop, remained essentially constant through to heading. Maximum amounts of both herbicides, on a milligram per hectare basis, were detected in the aboveground portions of the crop at heading and were in the order of 0.01% of the amounts applied to the soil. No residues of either herbicide were detected in the mature grain.Key words: Triallate, trifluralin, vapor, uptake, wheat, residues

scholarly journals Effect of Saline Irrigation on Agro-Physiological and Biochemical of Some Quinoa Cultivars Under Field Conditions

2019 ◽  
Vol 1 (4) ◽  
pp. 1-9
Author(s):  
Moatz A. Mohamed ◽  
M.H. Mubarak ◽  
Salah.A. Okasha
Keyword(s):  
Field Experiments ◽  
Chenopodium Quinoa ◽  
Growth Yield ◽  
Total Content ◽  
Growing Season ◽  
Field Conditions ◽  
Fresh Weight ◽  
Saline Irrigation ◽  
North Sinai ◽  
Physiological And Biochemical

In regions where irrigation water supplies are limited, drainage or water with salinity can be used to supplement them. Field experiments were carried out during the quinoa growing season of 2015/2016 and 2016/2017 at North Sinai in order to evaluate six quinoa genotypes (Chenopodium quinoa Willd.) under saline irrigation (5400 ppm) on growth, yield, its component, seeds chemical composition under field conditions. For plot 50% heading and maturity, the most earliness averages were 47.25 and 92.50 day, respectively for genotype Q-Q37-1, while the least earliness averages were 55.75 and 96.25 for genotypes KVLSRA 2 and KVLSRA 1, respectively. The highest averages was recorded for number of panicles/plant, plant fresh weight, plant yield weight, harvest index, 1000 seeds weight index and yield / fed-1 (ton) were 12.27, 82.32 gm, 17.83 gm, 28.89 %, 2.97 gm and 1.84 ton fed-1 ) for genotypes Q-Q37-1, Q-Q37-1, Q-Q37-1, Q-Q37-1, Q52 and Q-Q37-1, respectively. While, the lowest values were recorded for genotypes KVLSRA1, KVLSRA1, KVLSRA1, Regeolona, KVLSRA1 and KVLSRA1 with averages 8.72, 23.73gm, 5.52 gm, 22.76 %, 2.43 gm and 1.23 ton fed-1, respectively. For protein and carbohydrates total content, values ranged from 14.75 to 10.59 and from 58.13 to 54.64 % for genotypes Q52 and Regeolona, respectively. While in moisture content, values ranged from 11.66 to 10.83 for genotypes KVLSR1 and Q-Q37-1 , respectively. Also, fats content ranged from 10.44 to 7.14 % for genotypes Q52 and Regeolona, respectively. While values of saponin ranged from 0.56 to 0.37% for genotypes KVLSR1 and Regeolona, respectively.

Growth and Yield Response of Wheat (Triticum aestivum L.) To Different Sowing Times and Weed Competition Durations.

2000 ◽  
Vol 3 (4) ◽  
pp. 681-682
Author(s):  
Asghar Ali ◽  
M. Asghar Malik . ◽  
Rana Majid Rahman . ◽  
Rashid Sohail . ◽  
M.M.Akram .
Keyword(s):  
Triticum Aestivum ◽  
Triticum Aestivum L ◽  
Growth And Yield ◽  
Yield Response ◽  
Weed Competition
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