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Effect of leaf age and nitrogen fertilisation on sporulation of crown rust ( Puccinia coronata var. lolii ) on perennial ryegrass ( Lolium perenne L.)
Author(s) -
PLUMMER ROSETTA M.,
HALL R. L.,
WATT TRUDY A.
Publication year - 1992
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1992.tb03986.x
Subject(s) - biology , perennial plant , lolium perenne , spore , rust (programming language) , inoculation , puccinia , germination , agronomy , horticulture , botany , mildew , computer science , programming language
Summary Individual leaves of perennial ryegrass cv. Aberystwyth S23 of two leaf ages and at two levels of nitrogen fertilisation were point inoculated with Puccinia coronata f.sp. coronata in a growth chamber. In general, there was no significant difference in the lifespan of inoculated versus control leaves. However, the higher rate of nitrogen extended leaf lifespan more markedly in rusted than in control leaves. Uredospore production varied according to leaf age: colonies on juvenile leaves produced three times as many spores as those on mature leaves.