title: Absorptive cells in protoxylem: Association between mitochondria and the plasmalemma.
abstract: In parenchyma cells grouped around the stem protoxylem in Pinus pinea characteristic wall ingrowths occur. The numerous mitochondria of such cells are very closely associated with the plasmalemma bounding the ingrowths. A functional relationship between this association and salt absorption from the xylem transpiration stream is suggested.
authors: Department of Biochemistry, University of Cambridge, UK.
authors: F B
authors: FB
authors: Wooding