Arbuscular mycorrhizal fungi affect phytophagous insect specialism

Gange, Alan C.; Stagg, Penny G.; Ward, Lena K.

doi:10.1046/j.1461-0248.2002.00299.x

Cited by 89 publications

(67 citation statements)

References 27 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results reported by Rabin and Pacovsky (1985) or Gange and West (1994) fit into the pattern analysed by Gange et al (2002). They found that plant families or species, which are strongly mycorrhizal, have lower proportions of chewing insects.…”

Section: Fig 3 Mean Percentages (±Sd) Of Number Of Times Tetheredsupporting

confidence: 57%

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

View full text Add to dashboard Cite

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.

show abstract

Section: Fig 3 Mean Percentages (±Sd) Of Number Of Times Tetheredsupporting

confidence: 57%

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

View full text Add to dashboard Cite

show abstract

“…As a result, these enemies would likely benefit from a host plant's association with mycorrhizal fungi even if it does result in an increase in secondary chemicals. Alan Gange and collaborators (Gange et al 2002a) surveyed the flora of the United Kingdom and found a positive correlation between mycorrhizal status and the number of specialist herbivores feeding on that plant family. Indeed, specialist herbivores have often been shown to increase in fitness due to an association with mycorrhizal fungi in a number of studies (Rabin and Pacovsky 1985;Sanders et al 1993;Gange and West 1994;Borowicz 1997;Gange et al 2002a).…”

Section: Type Of Plant Enemymentioning

confidence: 99%

“…Alan Gange and collaborators (Gange et al 2002a) surveyed the flora of the United Kingdom and found a positive correlation between mycorrhizal status and the number of specialist herbivores feeding on that plant family. Indeed, specialist herbivores have often been shown to increase in fitness due to an association with mycorrhizal fungi in a number of studies (Rabin and Pacovsky 1985;Sanders et al 1993;Gange and West 1994;Borowicz 1997;Gange et al 2002a). Parasitic plants might also be expected to benefit by feeding on hosts with a mycorrhizal association because they often directly tap into the xylem or phloem of a host plant, thereby avoiding plant defenses.…”

Section: Type Of Plant Enemymentioning

confidence: 99%

“…Generalist herbivores may be more susceptible to plant secondary chemicals (van der Meijden 1996;Manninen 1999) and therefore may be more negatively impacted by the same plant's association with mycorrhizal fungi, although this has never been directly tested. Gange et al (2002a) tested for the dichotomy between specialist and generalist herbivores in three species of Lamiaceae and found that specialist herbivores in his system were more positively affected by association with mycorrhizal fungi than were generalist herbivores on these same hosts. Root pathogens also tend to respond in a similar manner to generalist herbivores in the presence of mycorrhizae.…”

Section: Type Of Plant Enemymentioning

confidence: 99%

See 1 more Smart Citation

Three‐Way Interactions among Mutualistic Mycorrhizal Fungi, Plants, and Plant Enemies: Hypotheses and Synthesis

Bennett

Alers-García

Bever

2006

The American Naturalist

155

View full text Add to dashboard Cite

A number of studies have shown that an association with mycorrhizal fungi can alter the outcome of interactions between plants and their enemies. While the directions of these effects vary, their strength suggests the need for greater attention to multispecies interactions among plant enemies, plants, and mycorrhizal fungi. We recognize that mycorrhizal fungi could effect plant enemies by improving plant nutrition, modifying plant tolerance, or modifying plant defenses. In addition, mycorrhizal fungi could directly interfere with pathogen infection, herbivory, or parasitism by occupying root space. We formalize these alternative outcomes of multispecies interactions and explore the long-term dynamics of the plant-enemy interactions based on these different scenarios using a general model of interactions between plants and plant enemies. We then review the literature in terms of the assumptions of the alternative mechanisms and the predictions of these models. Through this effort, we identify new directions in the study of tritrophic interactions between enemies, plants, and soil mutualists.

show abstract

“…The relationship is usually considered to be beneficial to both partners (i.e., mutualism: Boucher 1985), with the plant receiving nutrients that mycorrhizal hyphae collect from the soil, and the fungus receiving carbohydrates that the plant produces during photosynthesis (Bonfante-Fasolo and Scannerini 1992). This exchange can greatly affect characteristics of the host plant that may subsequently affect the attendance and/or performance of aboveground insects, including herbivores (e.g., Gange et al 2002Gange et al , 2003Wamberg et al 2003;Guerrieri et al 2004;Koschier et al 2007; earlier studies reviewed in Gehring and Whitham 2002) and mutualists (Gange et al 2003;Guerrieri et al 2004;Gange and Smith 2005;Wolfe et al 2005;Cahill et al 2008). These indirect effects can, in turn, produce feedbacks to the host plant, such as altered levels of damage by herbivores.…”

Section: Introductionmentioning

confidence: 99%

Testing for mycorrhizal fungi-plant-ant indirect effects

Laird

Addicott

2009

Journal of Plant Interactions

View full text Add to dashboard Cite

Recent work has demonstrated indirect effects between mycorrhizal fungi and insect herbivores and pollinators. The existence of indirect effects between mycorrhizal fungi and protection-for-food mutualists, such as extrafloral nectar-foraging 'bodyguard ants', is unknown. In this study, we examined the potential for indirect effects of arbuscular mycorrhizal fungi on aggressive ant bodyguards, mediated by changes in the expression of extrafloral nectaries of a shared host plant. We found that mycorrhizal plants grew larger and produced more extrafloral nectaries compared to their non-mycorrhizal counterparts. The difference in the number of nectaries between mycorrhizal and non-mycorrhizal plants, however, was too small to elicit differences in ant attendance. In spite of the lack of a significant indirect effect of mycorrhizal fungi on ant attendance, mycorrhizal plants suffered damage to a significantly greater proportion of their leaves compared to non-mycorrhizal plants. This result likely stems from other (non-ant-mediated) indirect effects of mycorrhizal fungi on herbivores.

show abstract

Arbuscular mycorrhizal fungi affect phytophagous insect specialism

Cited by 89 publications

References 27 publications

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

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

Three‐Way Interactions among Mutualistic Mycorrhizal Fungi, Plants, and Plant Enemies: Hypotheses and Synthesis

Testing for mycorrhizal fungi-plant-ant indirect effects

Contact Info

Product

Resources

About