Erratum: Light and electron microscope studies on cell wall breakdown in American elm xylem tissues infected with Dutch elm disease

Abstract

On page 2678, the section beginning on line 31 of the left-hand column should read "Such a mass (Fig. 58) is bound by a thin band of fibrillar-like material, apparently continuous at times with similar material within the mass (Fig. 58B, broken arrow); at one end (point a), it is abutted by material characteristic of intercellular spaces, and at the other (point b), it seems to encroach on the primary wall of the adjacent cell (Fig. 58A). Some of the masses may show signs of cleavage demarcated by bands of less opaque material sometimes continuous with the denser outer material (Fig. 60)."