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Effects of biotic and abiotic stress on the growth of three genotypes of Lolium perenne with and without infection by the fungal endophyte Neotyphodium lolii
Author(s) -
LEWIS G C
Publication year - 2004
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.1744-7348.2004.tb00316.x
Subject(s) - biology , neotyphodium , lolium perenne , endophyte , abiotic component , abiotic stress , biotic stress , botany , horticulture , agronomy , poaceae , ecology , biochemistry , gene
Summary The combinations of three genotypes of Lolium perenne with and without (i) infection by the fungal endophyte Neotyphodium lolii , (ii) infection by ryegrass mosaic virus and (iii) one of five different forms of abiotic stress were studied in pot experiments in a glasshouse. The five abiotic stress treatments were (i) low pH (compared with ‘optimal’ pH), (ii) cutting plants to a height of 1 cm (compared with 5 cm), (iii) shading (compared with no shading), (iv) cutting plants at 2‐weekly intervals (compared with 6 wk) and (v) low nitrogen applied (compared with ‘high’ nitrogen applied). On average, over the five experiments, the accumulated herbage dry weight was 10% more for N. lolii ‐infected plants than uninfected, 22% more for virus‐free plants than infected, and 265% more for ‘unstressed’ plants than for plants with abiotic stress. The effects of N. lolii infection on plant growth when the plants were under abiotic or biotic stress were not consistent.