ELECTRON PROBE ANALYSIS OF SAP EXUDATES OF TWO VARIETIES OF WHEAT (TRITICUM AESTIVUM L.) S. Gartner, N. Roinel and N. Paris-Pireyre J. Phys. Colloques, 45 C2 (1984) C2-515-C2-518 DOI: 10.1051/jphyscol:19842117