Epichloë fungal endophyte colonisation and seed quality in developing grass florets - effect of different fertiliser applications

Perennial ryegrass is an important pasture, forage and turf plant, and in New Zealand, it is commonly and intentionally inoculated with selected beneficial endophyte strains. These endophytes provide enhanced traits to their host grasses with AR37, a market leading strain, conferring a broad spectru...

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Bibliographic Details
Published in:New Zealand journal of agricultural research 2018-01, Vol.61 (1), p.27-41
Main Authors: Wang, Muyu, McGill, Craig R., Southward, Robert C., He, Xiong Zhao, Card, Stuart D., Rolston, M. Philip
Format: Article
Language:English
Subjects:
Ammonium
Colonization
Endophytes
Epichloë festucae var. lolii
Fertilizers
Germination
Grasses
Insects
Lolium perenne
nitrate
Nitrogen
Nitrogen fertilizers
Pasture
Position measurement
Potassium
Potassium fertilizers
Ryegrasses
Seed germination
TSW
Turf
urea
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Summary:Perennial ryegrass is an important pasture, forage and turf plant, and in New Zealand, it is commonly and intentionally inoculated with selected beneficial endophyte strains. These endophytes provide enhanced traits to their host grasses with AR37, a market leading strain, conferring a broad spectrum of insect deterrence coupled with excellent animal performance. The effect of different nitrogen forms, with and without potassium, on a range of seed quality parameters, and presence of AR37, was determined. TSW and seed germination did not respond to nitrogen application. However, a combination of nitrogen and potassium reduced TSW and seed germination and increased empty seed percentage. There was no influence of spikelet position on any of the seed quality parameters measured. However, within a spikelet, there was an effect of floret position on TSW, empty seed and endophyte presence. The effect varied depending on whether nitrogen was applied as nitrate or ammonium.
ISSN:0028-8233
1175-8775
1175-8775
DOI:10.1080/00288233.2017.1383275