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Pontacyl brilliant pink as a tracer dye in the movement of water in phreatophytes
Author(s) -
Robinson T. W.,
Donaldson Donald
Publication year - 1967
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr003i001p00203
Subject(s) - tracer , fluorometer , fluorescence , brilliant green , environmental science , chemistry , hydrology (agriculture) , environmental chemistry , geology , physics , organic chemistry , quantum mechanics , geotechnical engineering , nuclear physics
In connection with evapotranspiration studies Pontacyl Brilliant Pink, a fluorescent dye, was used to trace the movement of water in two species of woody phreatophytes, willow and wildrose. The dye was introduced into water surrounding the plant roots on August 4, 1964. Thereafter, leaf samples were collected periodically until the end of the growing season in October. Fluorometric measurements showed the presence of the dye in the leaves. Dye was also found in samples of roots and stems and in transpired water collected in plastic bags. Dye concentration was greatest in the upper part of the stems. As a tracer the dye offers a rapid method for studying the source, movement, and disposal of water used by phreatophytes. The method is rapid and inexpensive, and the laboratory determination is not difficult. The fluorometric determinations were made with a GK Turner Fluorometer Model 111, which has a sensitivity of 1 ppb.