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Leaf Surface Microflora May Significantly Affect Studies on Foliar Uptake of Chemicals
Author(s) -
Schreiber L.,
Schönherr J.
Publication year - 1992
Publication title -
botanica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0932-8629
DOI - 10.1111/j.1438-8677.1992.tb00310.x
Subject(s) - pentachlorophenol , picea abies , desorption , chemistry , microorganism , kinetics , chromatography , environmental chemistry , botany , bacteria , biology , adsorption , organic chemistry , genetics , physics , quantum mechanics
Abstract Uptake and desorption kinetics of methylglucose and pentachlorophenol (PCP) by needles of Picea abies (L.) Karst. were studied. Uptake of methylglucose was very rapid, equilibrium was obtained within 2 h and the amounts of methylglucose associated with the needles could be completely desorbed within 8 h. In contrast, PCP uptake was steady for several hours and the amounts of PCP taken up could only partially be desorbed again. Needles treated with NaN 3 prior to uptake measurements, showed no methylglucose uptake at all, whereas PCP uptake was not affected. Thus it is concluded that the hydrophilic methylglucose was taken up solely by epiphytic microorganisms, whereas the lipophilic PCP was taken up into the needle interior in significant amounts. Consequences of these results on studies of foliar uptake of chemicals are pointed out.