Persea americana, Mesocarp Cell Structure, Light and Electron Microscope Study Author(s): Flora Murray Scott, Barbara G. Bystrom and E. Bowler Reviewed work(s): Source: Botanical Gazette, Vol. 124, No. 6 (Dec., 1963), pp. 423-428 Published by: The University of Chicago Press Stable URL: http://www.jstor.org/stable/2473211 . Accessed: 09/02/2013 21:55 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact
[email protected]. The University of Chicago Press is collaborating with JSTOR to digitize, preserve and extend access to Botanical Gazette. http://www.jstor.org This content downloaded on Sat, 9 Feb 2013 21:55:02 PM All use subject to JSTOR Terms and Conditions 1963] HAIGH & GUARD-ROOT-TIP MITOSES 423 the rest of the quiescentarea, as delineatedby the boundaries of the quiescent zone on the side away CLOWES, only one division has been observed, from the root cap cannot be definedwith precision. whereasin the epidermalportion, a much smaller In the remainder of the apex behind this region, area, seven distinctdivisions are recorded.While there appears to be a fairlyuniform distribution of approximately1800 divisionshave been plotted,it divisions, with perhaps a rather higher density of would be desirableto studymany more sections in orderto clearlydefine the status of the epidermal division in the central, or "columella" area, than in region.