Needles of white spruce inoculated with rugulosin-producing endophytes contain rugulosin reducing spruce budworm growth rate

Miller, J. David; Mackenzie, Sabrena; Foto, Mark; Adams, Gregory W.; Findlay, John A.

doi:10.1017/s0953756202005671

Cited by 110 publications

(75 citation statements)

References 22 publications

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“…The effects have also been shown to cascade to the third trophic level, e.g., parasitoids (Bultman et al, 1997). The effects of various nonclavicipitalean pine endophytes (e.g., Phyllosticta, Rhabdocline, Leptostroma, and Cryptocline) on spruce budworm (Choristoneura fumiferana (Clemens)) have also been ascribed to endophyte-produced metabolites (Clark et al, 1989;Miller et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Entomopathogenic fungal endophytes

Vega¹,

Posada²,

Aime³

et al. 2008

Biological Control

434

238

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Fungal endophytes are quite common in nature and some of them have been shown to have adverse effects against insects, nematodes, and plant pathogens.Our research program is aimed at using fungal endophytes-mediated plant defense as a novel biological control mechanism against the coffee berry borer, the most devastating pest of coffee throughout the world. A survey of fungal endophytes in coffee plants from Hawaii, Colombia, Mexico, and Puerto Rico has revealed the presence of various genera of fungal entomopathogens, including Acremonium, Beauveria, Cladosporium, Clonostachys, and Paecilomyces. Two of these, B. bassiana and Clonostachys rosea, were tested against the coffee berry borer and were shown to be pathogenic. This paper reviews the possible mode of action of entomopathogenic fungal endophytes. Published by Elsevier Inc.

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Section: Introductionmentioning

confidence: 99%

Entomopathogenic fungal endophytes

Vega¹,

Posada²,

Aime³

et al. 2008

Biological Control

434

238

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“…Endophytic fungi, which live within host plant tissues without causing any visible symptoms of disease (Wilson 1995) are known to occur in almost all higher plants (Azevedo et al 2000), and are important mediators of plant-herbivore interactions (Rajagopal and Suryanarayanan 2000;Omacini et al 2001;Miller et al 2002;Meister et al 2006). They are generally viewed as mutualists; by receiving nutrition and protection from their host plants, the endophytes enhance resistance of the host plant against insect herbivores or pathogens (Clay 1990;Breen 1994).…”

Section: Introductionmentioning

confidence: 99%

Influence of an endophytic fungus on host plant selection by a polyphagous moth via volatile spectrum changes

Jallow

Dugassa‐Gobena

Vidal

2008

Arthropod-Plant Interactions

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Recently the role of micro-organisms as mediators of plant-herbivore interactions has been increasingly acknowledged in ecological research. We investigated the interaction between an unspecialized root fungal endophyte (Acremonium strictum) and the polyphagous moth Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), in greenhouse and laboratory bioassays. Specifically we examined in tomato (Lycopersicon esculentum Mill.) the systemic effects of the endophytic fungus on the host selection behaviour of female moths for oviposition and the volatile profiles of host plants to understand the mechanisms acting in this multi-trophic model system. Both laboratory and field strains of H. armigera moths oviposited more on leaves of A. strictum inoculated plants as compared to endophyte-free plants, both in free flight cages and in tethered moth laboratory experiments; the moth's preferences were significant between 10 and 18 days after inoculation. The analysis of volatile profiles showed strong quantitative differences between treatments. Endophyte inoculated plants emitted diverse terpenes and sesquiterpenes at significantly lower amounts as compared to endophyte free-plants, except for a-terpinene, which did not differ between the treatments, and trans-bcaryophyllene, which was emitted in significantly higher amounts on inoculated plants. b-Thujene and a-phellandrene accounted for 73.3 and 12.0% of total amounts of volatiles emitted from endophyte-free and inoculated plants, respectively. Our findings demonstrate that A. strictum is able to systemically influence the host selection of H. armigera moths for oviposition; conceivably mediated by the induced changes in volatile emissions (and probably additional biochemical parameters of the host plants, which have not been analysed so far). We argue for a more detailed assessment of micro-organisms invisibly colonizing plants, when studying plant-herbivore or multitrophic interactions.

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“…In grasses (4) and other herbaceous plants (5), dominant endophytes are known to produce toxic alkaloids that deter or poison herbivores. In woody plants, endophytes also may function in specific defense roles (6) or more generally function to limit pathogen damage (7). Together with mycorrhizal fungi, endophytes form an integral part of the extended phenotype or symbiotic community of a plant (8).…”

mentioning

confidence: 99%

A community of unknown, endophytic fungi in western white pine

Ganley

Brunsfeld

Newcombe

2004

Proc. Natl. Acad. Sci. U.S.A.

206

127

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The endophytic fungi of woody plants may be diverse as often claimed, and likewise, they may be functionally novel as demonstrated in a few studies. However, the endophyte taxa that are most frequently reported tend to belong to fungal groups composed of morphologically similar endophytes and parasites. Thus, it is plausible that endophytes are known (i.e., described) parasites in a latent phase within the host. If this null hypothesis were true, endophytes would represent neither additional fungal diversity distinct from parasite diversity nor a symbiont community likely to be novel ecologically. To be synonymous with parasites of the host, endophytes should at least be most closely related to those same parasites. Here we report that seven distinct parasites of Pinus monticola do not occur as endophytes. The majority of endophytes of P. monticola (90% of 2,019 cultures) belonged to one fungal family, the Rhytismataceae. However, not a single rhytismataceous endophyte was found to be most closely related by sequence homology to the three known rhytismataceous parasites of P. monticola. Similarly, neither endophytic Mycosphaerella nor endophytic Rhizosphaera isolates were most closely related to known parasites of P. monticola. Morphologically, the endophytes of P. monticola can be confounded with the parasites of the same host. However, they are actually most closely related to, but distinct from, parasites of other species of Pinus. If endophytes are generally unknown species, then estimates of 1 million endophytes (i.e., approximately 1 in 14 of all species of life) seem reasonable.

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Needles of white spruce inoculated with rugulosin-producing endophytes contain rugulosin reducing spruce budworm growth rate

Cited by 110 publications

References 22 publications

Entomopathogenic fungal endophytes

Entomopathogenic fungal endophytes

Influence of an endophytic fungus on host plant selection by a polyphagous moth via volatile spectrum changes

A community of unknown, endophytic fungi in western white pine

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