PHENOLIC-COMPOUNDS IN THE PHLOEM OF PRUNUS TREES, SECTION EUCERASUS

The flavans were the predominant compounds in the phloem of mature Prunus shoots (section Eucerasus), constituting about 5-12% of the dry substance. Chlorogenic acids were less concentrated and varied between 1.2 and 0.2% of the dry weight. The flavans were higher in P. avium than in P. cerasus. The reverse was true with chlorogenic acids. This pattern did not change remarkably near the union when cultivars of P. avium were grafted on clones of P. cerasus or P. fruticosa. © 1979.