Studies on Onion Seeds Germination: 1- Effect of Moist-Chilling on Germination of Onion Seeds Stored for Two Different Periods and Subsequent Seedling Growth.

Abstract

Onion seeds rapidly lose its viability and vigor after short time of harvest, and therefore its germinability largely decline. Consequently, the present investigation was carried out during the period from 2010-2012 in both Plant Tissue Culture Laboratory, Vegetables & Ornamentals Department, Faculty of Agriculture, Mansoura University and greenhouse of a private nursery in production of vegetable transplants, Qlabasho village, El-Dakahlia Governorate to study the effect of Moist-chilling (cold stratification) treatment for four periods (0, 5, 10 and 15 days) at 5 ± 1 0 C on improvement of the germination parameters in the laboratory (germination percentage, seedling length, fresh and dry weight and vigor index) of onion seeds cv. "Red Beheri" stored for one or two years and enhancing growth characters (bulblet diameter, transplant length, fresh and dry weights and vigor index) of the subsequent transplants. The obtained results clearly indicated that all germination parameters of onion seeds stored for one or two years (except mean germination time) and also all obtained transplant characters except leaves number were significantly increased in all moist-chilling treatments than control one. The best treatment in this regard was moist-chilling for 15 days whereas the lowest one was control (non chilled seeds).

Effect of Different Sowing Dates and Various Varieties on Seedling Growth of Late Kharif Onion (Allium cepa L.) in Assam

“…More number of leaves might have enhanced the photosynthesis, accumulation of photosynthesis consequently in higher fresh weight and dry weight of plant. These results were confirmed with the reports of Zaghloul et al [13], and Bosekeng and Coetzer [12].…”

“…More number of leaves per plant might have resulted in more photosynthesis and accumulation of food material, resulting in higher fresh weight of the plant. Findings are confirmatory with the results of Cramer [11] and Zaghloul et al [13].…”