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FLUXES OF PHOSPHORUS IN LEAVES OF BARLEY INFECTED WITH BROWN RUST
Author(s) -
AHMAD I.,
FARRAR J. F.,
WHITBREAD R.
Publication year - 1984
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1984.tb02746.x
Subject(s) - xylem , spore , biology , rust (programming language) , fungus , phosphorus , botany , polyphosphate , horticulture , chemistry , phosphate , biochemistry , organic chemistry , computer science , programming language
S ummary The movement of 32 P, fractionation of 32 P and unlabelled phosphorus, and efflux of 32 P from leaf discs, in control and brown‐rust infected first leaf blades of barley are described for the day of sporulation, 7 d after infection. It is shown that P retranslocation is greatly reduced by disease, that the concentration of P in the infected leaf blade increases greatly and that the increase is probably largely in the fungus, and partly in the form of polyphosphate. The P content of fungal spores is derived largely from P currently entering the leaf in the xylem. The data are used to derive P budgets for control and infected leaf‐blades, and the significance of P to the diseased state is discussed.