Abstract
This research was carried out to study the effect of three sowing dates (15th Oct., 15th Nov. and 15th Dec.) and two cooling treatments (5 degrees C and -20 degrees C) on growth, structure and some chemical components of B. vulgaris L. cv. Pleno root. The obtained data are summarize as follows: maximum values of root length, root diameter, fresh and dry weight, cortex thickness, average rows number of cortex, cambium region thickness, sucrose %, T.S.S. and total phenols were recorded with 15th Oct. treatment. On the other hand, most of the studied cooling treatments, in most cases, increased of root diameter, fresh and dry weight, total phenols and auxin like-substances in comparison with the control. [Sakr, M. M., O. A. Almaghrabi and S. M. H. Gowayed. Effect of some agricultural treatments on Beta vulgaris L. cv. Pleno root. Life Sci J 2012;9(4):1814-1819] (ISSN:1097-8135). http://www.lifesciencesite.com. 275