Tropes

ScienceDaily_2014 05103.txt

#Moose drool inhibits growth of toxic fungussome sticky research out of York University shows a surprisingly effective way to fight against a certain species of toxic grass fungus: moose saliva (yesâ#moose saliva. Published in this month's Biology Letters Ungulate saliva inhibits a grass-endophyte mutualism shows that moose and reindeer saliva when applied to red fescue grass (which hosts a fungus called epichloã festucae that produces the toxin ergovaline) results in slower fungus growth and less toxicity. Plants have evolved defense mechanisms to protect themselves such as thorns bitter-tasting berries and in the case of certain types of grass by harbouring toxic fungus deep within them that can be dangerous or even fatal for grazing animals says York U Biology Professor Dawn Bazely who worked with University of Cambridge researcher Andrew Tanentzap and York U researcher Mark Vicari on the project. We wanted to find out how moose were able to eat such large quantities of this grass without negative effects. Inspired by an earlier study that showed that moose grazing and saliva distribution can have a positive effect on plant growth the research team set out to test an interesting hypothesis --whether moose saliva may in fact detoxify the grass before it is eaten. Working in partnership with the Toronto Zoo the team collected saliva samples from moose and reindeer which they then smeared onto clipped samples of red fescue grass carrying the toxic fungus simulating the effect of grazing. They found that the application of saliva produced rapid results inhibiting fungus growth within 12-36 hours. We found that the saliva worked very quickly in slowing the growth of the fungus and the fungus colonies says Bazely. In addition by applying multiple applications of saliva to the grass over the course of two months we found we could lower the concentration of ergovaline between 41 and 70 per cent. Bazely says that because moose tend to graze within a defined home range it's possible that certain groups of plants are receiving repeated exposure to the moose saliva which over time has resulted in fewer toxins within their preferred area. We know that animals can remember if certain plants have made them feel ill and they may avoid these plants in future says Bazely. This study the first evidence to our knowledge of herbivore saliva being shown to'fight back 'and slow down the growth of the fungus. Story Source: The above story is provided based on materials by York University. Note: Materials may be edited for content and length. Journal Reference f

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