THE STRUCTURE AND CYTOCHEMISTRY OF THE STIGMA-STYLE COMPLEX OF CORYLUS-AVELLANA L. TONDA-GENTILE-DELLE-LANGHE

Structural and cytochemical aspects of the stigma-style complex of Cor ylus avellana were studied. In cross section the stigmatic style consi sts of papillae, one or two layers of sub-epidermal cells and a centra l transmitting tissue. The papillae cover the style for about 80% of i ts length, are unicellular and are coated with a cuticle-pellicle. Dur ing development, the cell walls of the papillae increase in thickness and between them, below the cuticle, lipid bodies are observed. The su b-epidermal cells are similar in cell content to the papillae. The cen tral transmitting tissue consists of highly vacuolated cells and the i ntercellular spaces are filled with a proteic and polysaccharidic subs tance. Both the transverse and longitudinal walls contain plasmodesmat a. (C) 1998 Annals of Botany Company.