R.B. Chapman's scientific contributions
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Publications (2)
Meadow fescue, Festuca pratensis, infected with Neotyphodium uncinatum contains loline alkaloids that may deter attack from pasture insects. In a field experiment conducted in Canterbury, high leaf loline alkaloid concentration reduced damage by Argentine stem weevil (ASW; Listronotus bonariensis) adults to 12 unique endophyte-infected meadow fescu...
The larvae of New Zealand grass grub are economically important subterranean pests of pastures. Some endophyte-infected meadow fescues contain loline alkaloids in the roots, which can protect the plant from insect attack. Loline concentrations in the roots of meadow fescue ecotypes in autumn were similar to concentrations in shoots of the same line...
Citations
... Lolines and their derivatives have a unique structure, where they contain an oxygen bridge between carbon 2 and 7. They are water soluble and able to translocate around host tissues to areas such as the roots, where the endophyte itself is not found actively growing [39]. Only a small percentage of grass species with claviceptaceous endophytes have lolines, according to surveys, when compared to other alkaloids, e.g., ergot alkaloids which are widely distributed. ...
Reference: toxins-16-00274
![[object Object]](https://i1.rgstatic.net/ii/profile.image/272744961015811-1442038874206_Q64/Ravi-Gooneratne.jpg)
... However, research has been focused on a mix of loline derivatives. Larvae development of a variety of insects [18][19][20][21][22][23], as well as egg hatching and larval motility of Trichostrongylus colubriformis and Teladorsagia circumcincta nematodes [12] have been affected by a mix of loline extracts. Specifically, a combined NAL and NFL is nematocidal to the plant parasitic nematode Pratylenchus scribneri at 100 and 250 µg/mL concentration [24]. ...
