Effect of Waterstress on Total Nonstructural Carbohydrates, Total Nitrogen Contents in Leaves and Stem Apexes of Tangerine (Citrus reticulata Blanco cv. Khiew-Waan)

Abstract

The effect of waterstress on total nonstructural carbohydrates, total nitrogen contents in leaves and stem apexes- of tangerine (Citrus reticulata Blanco cv. Khiew-Wann) was studied at Tumbol Bung Ba, Nong Sua, Patum-Thani Province and at the Physiological laboratory, Horticulture Department, Faculty of Agriculture, Kasetsart University, during January 1985 to August 1986. The results showed that the plants under the waterstress conditions tended to contain higher total nonstructural carbohydrate contents in leaves and stem apexes than those under the normal irrigation. The lowest content of total nonstructural carbohydrate was found during the flushing period of the plants. Total nitrogen contents in leaves and stem apexes under the waterstress conditions the total nitrogen content in leaves was higher than that in the stem apexes.