title: Quantitative analysis of seasonal variation in the amino acids in phloem sap of Salix alba L.
abstract: Phloem sap of Salix alba L. was collected at monthly intervals between May and October. Amino acid analysis was carried out by ion exchange chromatography. The concentrations of individual amino acids are reported.
authors.affiliation: Biology Department, Queen Elizabeth College, Campden Hill, W8 7AH, London, UK.
authors.forename: P M
authors.initials: PM
authors.lastname: Leckstein
authors.forename: M
authors.initials: M
authors.lastname: Llewellyn