On the YOUNG'S Modulus during Growth of Pine Seedlings

Abstract

The value of apparent YOUNG'S modulus of the hypocotyl of pine seedling increased with growing duration. Both calculated YOUNG'S moduli of cell wall substances and of crystalline rich cell wall also increased. Because the increasing pattern of α-cellulose, lignin and crystalline region were not similar to that of the moduli, a distinct linear correlation between these structural parameters and the modulus could not be found. Contributions of these constituents to mechanical characteristics of the growing hypocotyls are discussed.