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Membrane Functions and Tolerance to Aromatic Hydrocarbon Fungitoxicants in Conidia of Fusarium solani
Author(s) -
Georgopoulos S. G.,
Zafiratos Catherine,
Georgiadis Eugenia
Publication year - 1967
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.1399-3054.1967.tb07177.x
Subject(s) - conidium , fusarium solani , mutant , phosphate , potassium , wild type , germination , chemistry , membrane permeability , membrane , botany , biology , biochemistry , gene , organic chemistry
With the use of 32 P‐labeled phosphate and 42 K 2 CO 3 the effect of diphenyl on permeability and uptake properties of the cytoplasmic membrane in wild type and diphenyl‐tolerant mutant conidia of Fusarium solani f. cucurbitae was studied. No general damage to the membrane with unspecific leakage of cell constituents was demonstrated under conditions in which diphenyl prevents germination of wild type conidia. The fresh conidia do not require exogenous supply of energy for the uptake of phosphate or of potassium. In the wild type the entry of 32 P is inhibited but that of 42 K strikingly stimulated by diphenyl. Independently of the tolerant mutant gene present, the mutant conidia are significantly less sensitive to the phosphate uptake inhibition and not affected at all by diphenyl with respect to the uptake of potassium. The latter difference from the wild type seems to indicate genetic control of some property of the potassium transport system in this fungus.