Rahmatollah Gholami; Kazem Arzani; Isa Arji
Abstract
An experiment was conducted to determine the effect of paclobutrazol (PBZ) and different irrigation amount on growth of aerial parts, leaf minerals and root performance in young olive plants cv. ‘Manzanillo’ in the Department of Horticulture, Faculty of Agriculture, Tarbiat Modarres University in ...
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An experiment was conducted to determine the effect of paclobutrazol (PBZ) and different irrigation amount on growth of aerial parts, leaf minerals and root performance in young olive plants cv. ‘Manzanillo’ in the Department of Horticulture, Faculty of Agriculture, Tarbiat Modarres University in 2000. A split plot experiment in time was used based on a completely randomized block design with four replications. The aim of this experiment was to determine the effect of water irrigation amount reduction on Manzanilo olive response. Treatments were 60, 70, 80, 90 and 100 % evapotranspiration (ETp) and 60% with 0.25 g a.i /pot paclobutrazol (PBZ). Control plants were used as reference to determine evapotranspiration (ETp). Some characteristics such as root, leaf and shoot fresh and dry weight, leaf area, leaf number, plant height, root length and mineral content were measured. Results indicate that root, leaf and shoot fresh and dry weight, leaf area, leaf number, plant height and N and K amount were increased with increasing of water amounts. No differences were found in measured characters between 90 and 100% (ETp) so a 10 percent saving in water was occurred. Result showed that pbz treatment after 45 days reduced shoot growth, leaf and shoot fresh and dry weight, leaf area, plant height, root length and N and K content. Although, PBZ treatment increased root to shoot fresh and dry weight ratio and increased root diameter. In case of water shortage pbz treatment is able to ameliorate the effect of water stress.
Roghayyeh Najafzadeh; Kazem Arzani; Alireza Babaei
Abstract
Abstract
Considering to importance and high genetic diversity of Pear (Pyrus communis L.) in Iran, a study was conducted on the effect of genotype on fruit physicochemical properties and qualitative characteristics of six mature European Pear genotypes in Teheran, Iran environmental conditions. In this ...
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Abstract
Considering to importance and high genetic diversity of Pear (Pyrus communis L.) in Iran, a study was conducted on the effect of genotype on fruit physicochemical properties and qualitative characteristics of six mature European Pear genotypes in Teheran, Iran environmental conditions. In this study some physicochemical fruit properties and qualitative characteristics such as: fruit length, width, length to width ratio, fruit pedicel length, fruit color, fruit fresh and dry weight, fruit volume, fruit firmness, total soluble solids (TSS), titratable acidity (TA), pH and sensory evaluate were monitored based on the descriptors of International Plant Genetic Resources Institute (IPGRI). Results showed significant differences within the studied genotypes in the most fruit characters (P ≤0.05). In addition, it was a diversity within the measured characters in fruit length (ranged from 6.99 to 9.82 cm), fruit width (4.69 to 7.17 cm), fruit length to width ratio (1.23 to 1.59), fruit pedicel length (2.2 to 3.73 cm), fruit color (yellow to yellowish green and green to red with L* value 60.47 to 74.08 and H* value 80.06 to 86.95 and C* value 46.16 to 53.43), fruit fresh weight (80.5 to 308.9 g), fruit dry weight (4.52 to 5.36 g), fruit volume (86.33 to 270.7 cm3), fruit firmness (1 to 2.37 Kg/cm2), TSS (14.9 to 17.63 οBrix), TA (0.18 to 0.41 % malic acid), TSS/TA (40.49 to 92.66) and pH (3.95 to 5.33). Results revealed that genotype A95 had better quality and physicochemical properties and qualitative characteristics than other genotypes which can be considered as promising genotype for further evaluations.
