This study was carried out during the two successive seasons of 2012 and 2013 on Manfaloty and Wonderful pomegranate trees at5 and 3-years old respectively, the trees were spaced at 4x4 m. grown in a sandy soil. The highest values of yield and its components i.e., fruit weight, fruit number /tree and yield /tree were recorded when Manfaloty and Wonderful pomegranate trees treated with GA3 at 50 or 100ppm, CaCl2 4 %, kaolin 2.5 or 5 % and bagging treatment. The lowest percentage of fruit creaking and sunburn were obtained with bagging treatment followed by kaolin 5% and spraying by CaCl2 and GA3 treatments compared with the control treatment .All treatments caused a highly significant increase in Marketable fruits %. Bagging treatment gave the highest Marketable fruits percentage compared with the control and other treatments. The highest fruit length and diameter obtained by GA3 50 or 100ppm and CaCl2 2 or 4% treatment. Furthermore,GA3, kaolin and bagging treatments improved SSC, total acidity and SSC/acid ratio ,meanwhile the highest anthocyanin content in juice and peel was obtained by bagging and spraying kaolin 5% treatments in both cultivars. Therefore, these treatments could be recommended for improving Manfaloty and Wonderfull pomegranate cvs performance under similar conditions of this study.
An investigation to study the influence of gamma rays as seeds exposing (0 , 1, 5,10, 15 and 20 kr) and N-Nitroso-N-Methyl Urea (NMU) as seed soaking in concentrations (0.0, 30, 60, 90, 120 and 150 ppm) on Lathyrus odoratus, it was conducted at the Experimental Farm of Fruit and Ornamental Plants Breeding Research Department, Horticulture Research Institute, ARC, Egypt during the two consecutive seasons of 2012/2013 and 2013/2014. The two experiments were arranged in randomized complete block design (RCBD) with three replicates. In M 1-generation, the results revealed lower in seed germination percentage, plant height, leaf chlorophyll content and number of flowers with increasing doses and concentrations of physical and chemical mutagens. However, the effect of mutagens on leaf length and flower anthocyanin content was insignificant at M 1 and M 2-generations. The higher doses of gamma-rays and concentrations of NMU led to delay the flowering date in M 1 and M 2-generations, decrease the seed germination percentage in M 2-generation,while lower doses and concentrations caused an increase in plant height, number of branches/plant, number of leaves/plant, number of flowers/plant and leaf chlorophyll content in M 2-generation. The variations means squares indicated insignificant difference between gamma-rays and NMU in M 1 and M 2-generations, in seed germination percentage, number of branches per plant, number of leaves per plant, flowering date and number of flowers per plant. However, higher variation was observed between gamma-rays and NMU in M 1 and M 2-generations, for plant height, leaf length and leaf chlorophyll content. The obtained results clearly indicated that different doses and concentrations of mutants can be effectively utilized to create variability for plant height (dwarfeness plants and compact) fasciata, chlorophyll mutation, leaf shape and flowers cluster length of sweet pea plants.
This investigation was carried out on Le-Conte pear trees, to study the effect of spraying potassium oxide (Ko2), Urea and gibberellic acid (GA3), alone or in combinations on fruit set percentage, yield., leaf mineral contents and fruit characters. Fruit quality was also studied after cold storage for one or two months.Results revealed that, all treatments gave significant increase in fruit set percentage and yield. Spray (Ko2 1.5 ml/L (or) 3.0 ml/L GA3 20 ppm), was superior for all results comparing to other treatments. Spraying of urea 1% + GA3 20 ppm gave better results than spraying with Ko2 1.5 ml/L (or) 3.0 ml/L + GA3 20 ppm. No differences were found for the two concentrations of KO2.Urea plus GA3 treatments in both seasons significantly increased leaf (N) content and decreased leaf (K) content. Concerning leaf (P) content, there was no clear differences between all treatments.During cold storage of pear fruits, firmness and total acidity were less than before storing and that of control. Total soluble solids were increased during cold storage.
Effect of promalin * and paclobutrazol ** were studied on growth and yield of Anna apple tress in meadow orchard during two seasons (1996-1997) and (1997-1998) . Vegetative growth was stimulated, when promalin applied at beginning of September with concentrations 200, 400 and 600 ppm.The application of 1000 ppm paclobutrazol (PBZ) at benginning of October on the trees treated with different concentration of promalin inhibited shoot growth, and increased spur number and increased the yield per tree Paclobutrazol increased the percentrage of total carbohydrate in leaves. Best results were obtained from treatments of 600 ppm promalin followed by 1000 ppm PBZ.The treatment of PBZ alone increased weight, size and color of the fruits. * Promalin : (6-benzylaminopurine + gibberelic acids 4+7) ** Paclobutrazol (PBZ) : (2RS,3RS) -1-(4-chlorophenyl -4,4-dimethyl-2-(1+ H -1,2,4triazol -1-y1) pentan -3-ol) (trade mark Cultar) a systemic growth regulator
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