Ristic, Z. Response of Xylem Ray Parenchyma Cells of Red Osier Dogwood (Cornus sericea L.) to Freezing Stress (Microscopic Evidence of Protoplasm Contraction). [electronic resource] - Plant physiology Feb 1994 - 737-746 p. digital Publication Type: Journal Article ISSN: 1532-2548 Standard No.: 10.1104/pp.104.2.737 doi