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FUNGAL ENDOPHYTES: A Continuum of Interactions with Host Plants
How life history traits—such as fungal reproduction and pattern of infections and genotypic variation and ecological factors—in the ecology and evolution of endophytes and host plants is discussed are discussed.
Mutualistic Asexual Endophytes in a Native Grass Are Usually Parasitic
The results challenge the notion that systemic asexual endophytes must be plant mutualists for infections to persist in nature and propose other hypotheses to explain the variable but usually high endophyte frequencies in natural populations of grasses.
Effects of Methyl Jasmonate and an Endophytic Fungus on Plant Resistance to Insect Herbivores
- L. Simons, T. Bultman, T. J. Sullivan
- Environmental ScienceJournal of Chemical Ecology
- 17 October 2008
It was found that methyl jasmonate hindered endophyte-infected tall fescue’s resistance against aphids by downregulating transcription of the LolC gene, and the opposite pattern was observed for endophytes-free tall fEscue; its exposure to MJ resulted in a significant increase in resistance to aphids, apparently through stimulating defense compounds produced by the plant.
Gene flow in the endophyte Neotyphodium and implications for coevolution with Festuca arizonica
Gene flow between Neotyphodium populations is very low, and likely much lower than the pollen mediated gene flow of its host; differing rates of gene flow are predicted to create trait mismatching between endophyte and host and may explain the low, or lack of, alkaloid production in Arizona fescue and other native grass species.
Influence of genetic variation in the fungal endophyte of a grass on an herbivore and its parasitoid
Results show that N. coenophialum can modify bottom‐up trophic cascades through direct effects on herbivores, as well as indirect effects on a natural enemy of the Herbivores and that the fungus may influence the tritrophic interaction in ways that counterbalance herbivore protection provided by the symbiont.
Genetic variation in a subterranean arthropod (Folsomia candida) as a method to identify low-permeability barriers in an aquifer
Effects of Fungal Endophyte Isolate on Performance and Preference of Bird Cherry-Oat Aphid
It is concluded that R. padi is sensitive to a variety of fungal isolate and plant cultivar combinations, but that genetic variation in both plant and fungus can influence the degree of resistance provided by the fungus.
Peramine Alkaloid Variation in Neotyphodium-Infected Arizona Fescue: Effects of Endophyte and Host Genotype and Environment
We determined concentrations of peramine, the only alkaloid produced by Neotyphodium-infected (E+) Arizona fescue plants (of the four major types typically assayed in infected grasses), in a…
Influence of fungal isolates infecting tall fescue on multitrophic interactions
Do Botanophila flies provide reproductive isolation between two species of Epichloë fungi? A field test.
- T. Bultman, A. Leuchtmann, T. J. Sullivan, Austin P. Dreyer
- Biology, Environmental ScienceThe New phytologist
- 1 April 2011
Data, which show hybrid ascospores are produced, suggest postzygotic isolating mechanisms are an important means of reproductive isolation between the fungi, and suggest other mechanisms are likely more important.