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Early effects of triadimefon on water relations, sterol composition and plasma membrane ATPase in white spruce ( Picea glauca ) seedlings
Author(s) -
Sailerova Eva,
Zwiazek Janusz J.
Publication year - 1996
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1996.tb00540.x
Subject(s) - triadimefon , sterol , transpiration , botany , chemistry , shoot , biology , horticulture , photosynthesis , biochemistry , cholesterol , fungicide
Seedlings of white spruce ( Picea glauca [Moench] Voss.) were treated with triadimefon solution applied to the soil, and their early responses studied from 12 h to 7 days after treatment. Transpiration rates declined and respiration rates increased immediately after the commencement of triadimefon treatment. Photosynthetic rates declined less than transpiration rates, resulting in an increase in water use efficiency, whereas root and shoot water potentials remained unchanged during the first 5 days of triadimefon treatment. Triadimefon decreased root hydraulic conductivity and inhibited the activity of the plasma membrane ATPase. In addition, triadimefon‐treated roots drastically increased the ratios between free sterols and sterol esters and decreased the ratios between sterol esters and acylated sterol glycosides.