scholarly journals Metabolic Profiles of Lolium perenne Are Differentially Affected by Nitrogen Supply, Carbohydrate Content, and Fungal Endophyte Infection

2008 ◽  
Vol 146 (3) ◽  
pp. 1440-1453 ◽  
Author(s):  
Susanne Rasmussen ◽  
Anthony J. Parsons ◽  
Karl Fraser ◽  
Hong Xue ◽  
Jonathan A. Newman
Keyword(s):  
Lolium Perenne ◽  
Fungal Endophyte ◽  
Nitrogen Supply ◽  
Carbohydrate Content ◽  
Metabolic Profiles ◽  
Endophyte Infection

scholarly journals High nitrogen supply and carbohydrate content reduce fungal endophyte and alkaloid concentration inLolium perenne

2007 ◽  
Vol 173 (4) ◽  
pp. 787-797 ◽  
Author(s):  
Susanne Rasmussen ◽  
Anthony J. Parsons ◽  
Shalome Bassett ◽  
Michael J. Christensen ◽  
David E. Hume ◽  
...  
Keyword(s):  
Fungal Endophyte ◽  
Nitrogen Supply ◽  
Carbohydrate Content ◽  
High Nitrogen

scholarly journals Ryegrass production in Wairarapa, New Zealand: is biological control of Argentine stem weevil important?

2007 ◽  
Vol 13 ◽  
pp. 301-306
Author(s):  
M.R. Mcneill ◽  
D.E. Hume ◽  
R. Ashby ◽  
M. Ashby ◽  
P. Brandon ◽  
...  
Keyword(s):  
Lolium Perenne ◽  
Dry Matter ◽  
Fungal Endophyte ◽  
Wild Type ◽  
Neotyphodium Lolii ◽  
Endophyte Infection ◽  
Plant Persistence ◽  
Listronotus Bonariensis ◽  
Microctonus Hyperodae ◽  
Over Time

To investigate the interaction between Argentine stem weevil (Listronotus bonariensis), its parasitoid Microctonus hyperodae, fungal endophyte (Neotyphodium lolii) and its grass host, four endophyte-ryegrass (Lolium perenne) treatments were established on four farms in Wairarapa in autumn 2003. A diploid ryegrass contained either wild-type or AR1 endophyte or was endophytefree, while a tetraploid ryegrass contained AR1 endophyte. Wild-type, AR1 and endophyte-free ryegrasses average 52%, 91% and 2% endophyte-infected tillers for the 3 years of measurement. Moderate increases over time in the proportion of wild-type infected tillers indicated selection pressures favoured endophyte-infected tillers. Endophyte-free tiller populations were 11% lower than AR1 or wild-type but not significantly so. L. bonariensis populations were highest in endophyte-free and wild-type pastures and 80% lower in AR1 pastures. Mean rates of parasitism in L. bonariensis were lower in spring (9%) than autumn (35%), tended to be higher in wild-type than in AR1 diploid ryegrass, and only had a weak relationship with percent endophyte-infection. Keywords: endophyte, Neotyphodium lolii, Lolium perenne, dry matter yields, plant persistence, Listronotus bonariensis, Microctonus hyperodae

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