Effect of Soaked Allium Cepa L. Bulbs in Growth Regulators on their Growth and Seeds Production

Abstract

An field investigation was carried out to obtain the best treatment for onion seed quantity and quality in seasons of 2013/2014 and 2014/2015. The earliness of bolting and bolting period was found from treated onion bulbs with GA3 at 1000ppm and CCC at 100ppm compared to the control during both seasons. The highest significant differences of seed yield, weight of 1000 seeds and seed germination % was found from GA3 at 1000ppm compared to the control. On the other side, there are significant differences in seed yield were found from CCC at 1000 ppm, while the average weight of 1000 seeds and seed germination was obtained from CCC at 100ppm.Keywords: GA3, CCC, Allium cepa, seeds production, soaked bulbs Advances in Plants & Agriculture ResearchResearch Article Open Access and also growing season, [33][34][35] showed results of an experiment which carried out to establish the effect of cycocel concentrations (0, 1000, 1500, 2000ppm) on the quality characters of Kharif Onion viz., TSS, Sulphur and Protein content (%) in bulbs. Effect of soaked allium cepa L. bulbs in growth regulators on their growth and seeds productionCCC sprayed at the umbels significantly increased the gynogenic embryo rate, which was more than three times higher than the control. 36 Spraying onion plants with CCC reduced seed stalk height and diameter, umbel diameter and average number of flowers per umbel Percentage germination of the seeds produced and 1000-seed weight. 10 Moreover, the heaviest fresh and dry weights of flowers/ plant were gained by 2000ppm CCC-sprayed plants. 34 Cycocel (CCC) is an onion compound and regarded as most consumed moderator of plant growth especially in Europe and nowadays, is frequently applied to decrease the dormancy and control the germination growth of cultivating plants. 31 CCC prevents the activities of synthesized anticovering enzyme and decreases the plant height. 37 Seed performance of plants treated with CCC leads to the increases in root growth and water potential in the leaves. 31 Also, Cycocel decreases the height of plant and increases the vertical growth of branches so that the plant receives much light to do photosynthesis which improves the yield of seeds. 38 Treatment with CCC (chloromequat) and camposan M (ethephon), when applied in combination, reduced plant height and increased the resistance of the peduncles to bending, therby facilitating mechanical seed harvest. 39 The objective of this study was to investigate the effects of GA3 and CCC on leaf photosynthesis, flowering scapes number and seed yield, seed weight, seed germination percentage. In this thesis, we describe the experiments in which GA3 and CCC were applied to Allium cepa, in an attempt to enhance the plant growth and seed yield as well as improvement of the seed quality. Materials and methodsAllium cepa L. cv Giza 20 which is the most popular variety in A. R. Egypt was used in this investigation. Onion bulbs of used variety Giza 20 in this investigation were obtained from Onion Research Section, Agricultural Research ...