Growth of Wood-Inhabiting Fungi in Saturated Atmospheres of Monoterpenoids

Groot, R. C. De

doi:10.1080/00275514.1972.12019336

Cited by 33 publications

(15 citation statements)

References 4 publications

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“…Although not vectored by bark beetles, inoculation of Norway spruce with pathogenic fungus Heterobasidion parviporum resulted in an increased content of 1,8-cineole (Zamponi et al, 2007). In addition, p-cymene was the most effective of all tested terpenes in reducing growth of coniferous decay fungi (De Groot, 1972). It is therefore likely that both Ci and p-cymene are involved in the induced defense of conifers against bark beetles and/or their symbiotic fungi.…”

Section: Discussionmentioning

confidence: 98%

Peripheral modulation of pheromone response by inhibitory host compound in a beetle

Andersson

Larsson

Blaženec

et al. 2010

Journal of Experimental Biology

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SUMMARYWe identified several compounds, by gas chromatographic-electroantennographic detection (GC-EAD), that were antennally active in the bark beetle Ips typographus and also abundant in beetle-attacked spruce trees. One of them, 1,8-cineole (Ci), strongly inhibited the attraction to pheromone in the field. Single-sensillum recordings (SSRs) previously showed olfactory receptor neurons (ORNs) on I. typographus antennae selectively responding to Ci. All Ci neurons were found within sensilla co-inhabited by a pheromone neuron responding to cis-verbenol (cV); however, in other sensilla, the cV neuron was paired with a neuron not responding to any test odorant. We hypothesized that the colocalization of ORNs had a functional and ecological relevance. We show by SSR that Ci inhibited spontaneous activity of the cV neuron only in sensilla in which the Ci neuron was also present. Using mixtures of cV and Ci, we further show that responses to low doses (1-10ng) of cV were significantly reduced when the colocalized Ci neuron simultaneously responded to high doses (1-10mg) of Ci. This indicated that the response of the Ci neuron, rather than ligand-receptor interactions in the cV neuron, caused the inhibition. Moreover, cV neurons paired with Ci neurons were more sensitive to cV alone than the ones paired with the non-responding ORN. Our observations question the traditional view that ORNs within a sensillum function as independent units. The colocalization of ORNs might sharpen adaptive responses to blends of semiochemicals with different ecological significance in the olfactory landscape.

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Section: Discussionmentioning

confidence: 98%

Peripheral modulation of pheromone response by inhibitory host compound in a beetle

Andersson

Larsson

Blaženec

et al. 2010

Journal of Experimental Biology

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“…If indeed some of these leaf fungi are reacting to trees and sprouts as different substrates, one of the several factors that may influence substrate quality for these fungi is secondary compounds. Terpenoids occupy a prominent place among the secondary chemicals in redwood leaves (Hall & Langenheim, 1986), and they have differential fungistatic or fungitoxic effects on a variety of conifer-specialized fungi (Cobb et al, 1968;De Groot, 1972;Hall, 1985;Ennos & Swales, 1988). Since monoterpenes change in quantity and quality as redwood sprouts grow in height (Hall & Langenheim, 1986), these compounds may play a role in determining endophytic community composition in trees and sprouts.…”

Section: Endophytic Distribution In Basal Sprouts and Treesmentioning

confidence: 99%

The endophytic fungal community in leaves of a coastal redwood population diversity and spatial patterns

1990

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SUMMARYLeaf endophytic fungi were isolated from 1 to 12-yr-old leaves of mature trees and basal sprouts of coastal redwood [Sequoia sempervirens (D. Don ex Lamb.) EndL] in a redwood forest in Central California. Almost all samples yielded at least one species. The two most frequent species were Pleuroplaconema sp. and Cryptosporiopsis abietina Petrak. Among isolated taxa are endophytic generalists, species previously known as pathogens and a possible specialist. Species composition in leaves of progressing age in single branches revealed a patchy pattern of leaf colonization without an obvious sequence of succession. Changes in diversity and equitability in the endophytic community with leaf age are linked with differential distribution of some species in young versus old leaves and the increase in species richness in 4-and 5-yr-old leaves. The endophytic communities from leaves of trees and sprouts were generally similar, but with important differences in species richness and in distribution of Pleuroplaconema sp. and Pestalotiopsis funerea (Desm.) Stey. Principal component analysis based on endophytic frequency also indicated closeness of trees and sprouts as groups, but clearly separated each tree from its sprout. Differential susceptibility between trees and sprouts to endophytic infection is suggested on the basis of their endophytic communities.

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“…Some studies have been conducted to establish the toxicity of these secondary metabolites to plant pathogens: De Groot (1972) found that vapours of (+)-a-pinene, p-cymene and terpinolene caused 50% growth inhibition of Ceratocystis minor (Hedgecock) Hunt, and Trichoderma viride Persoon, and Chou and Zabkiewicz (1976) reported that spore germination of Sphaeropsis sapinea (Fr.) Dyko & Sutton was inhibited more by d-3-carene than by ())-b-pinene, ())-limonene or b-phellandrene.…”

Section: Introductionmentioning

confidence: 99%

Terpene response of Picea abies and Abies alba to infection with Heterobasidion s.l.

Zamponi¹,

Michelozzi

Capretti³

2007

Forest Pathology

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The monoterpene composition of Picea abies and Abies alba resin was analysed in relation to growth by Heterobasidion spp. Fifteen-year-old P. abies and A. alba trees were inoculated on branches with three species of Heterobasidion annosum s.l. After 4 months of incubation, each host was colonized to a significantly greater degree by the pathogen specific to that host (H. parviporum on P. abies, H. abietinum on A. alba) than by the other fungi. Analysis of the enantiomeric monoterpene profiles in the spruce and fir showed that the response in terms of the relative proportions of the monoterpene compounds in the resin differed between tree species. Following challenge with Heterobasidion spp., A. alba trees did not show changes in monoterpene composition in addition to those in the wounding response (increase in ())-a-pinene and ())-camphene, and decrease in b-phellandrene). In P.abies, ())-a-pinene, (+)-a-pinene and d-3-carene increased following Heterobasidion attack but not after wounding alone.

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Growth of Wood-Inhabiting Fungi in Saturated Atmospheres of Monoterpenoids

Cited by 33 publications

References 4 publications

Peripheral modulation of pheromone response by inhibitory host compound in a beetle

Peripheral modulation of pheromone response by inhibitory host compound in a beetle

The endophytic fungal community in leaves of a coastal redwood population diversity and spatial patterns

Terpene response of Picea abies and Abies alba to infection with Heterobasidion s.l.

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