| Abstract Detail
Physiology Ginzberg, Idit [1], Tzin, Enosh [1], Fogelman, Edna [1]. Potato Tuber Skin Development and Heat Induced Russeting. THE potato (Solanum tuberosum L.) periderm is made up of three cell types: phellem, phellogen and phelloderm. The phellem, forms a series of layers at the outermost level of the periderm, and is derived from the underlying meristematic phellogen layer. As phellem cells develop, they become suberized and then die, forming a protective layer that is designated as the “skin”. Hot climate affects the appearance of potato tubers; the heat induces russeting of the skin, thus reducing the marketability of the crop. It has been variously suggested that russeting of the tuber skin might result from increased periderm thickness, from strong cohesion between peridermal cells that prevents the outer layers from sloughing off, or from altered suberization processes in the skin. In order to improve skin quality we are attempting to identify the factors/genes controlling skin development, using histological and physiological approaches, as well as microarray and 2-D gel profiling. Results indicated that in elevated temperatures the development of the periderm and suberization of the phellem layers are enhanced in comparison to the process in the control samples. Furthermore, the layers of the suberized periderm cells collapsed to create a thick and non-flexible russeted skin. It is suggested that upon periods of optimal growth conditions that follow periods of high temperatures, the tubers resume their expansion, the non-flexible skin cracks, new periderm develops from underneath the fissures and the skin loses further its smoothness.
Log in to add this item to your schedule
1 - The Volcani Center, Vegetable Research, P O Box 6, Bet Dagan, 50250, Israel
Keywords:
potato tuber skin
russeting
suberization
periderm
high temperatures.
Session: PAA05-5
Location: Hall of Ideas Room F/Monona Terrace
Date: Thursday, July 27th, 2006
Time: 9:30 AM
Abstract ID:163 |
