Induced plant defences: from molecular biology to evolutionary ecology

Dicke, Marcel; Hilker, Monika

doi:10.1078/1439-1791-00129

Cited by 198 publications

(157 citation statements)

References 91 publications

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“…herbivore insects, nematodes, root pathogens and mycorrhizal fungi) plants can show several direct defense responses in the shoots that may affect aboveground herbivores and, thus plant fitness (van Loon et al 1998;van der Putten et al 2001;Paul et al 2000;Gange et al 2002;Dicke and Hilker 2003;van Dam et al 2003;.…”

Section: Introductionmentioning

confidence: 99%

Soil-borne microorganisms and soil-type affect pyrrolizidine alkaloids in Jacobaea vulgaris

Joosten

Mulder²,

Klinkhamer

et al. 2009

Plant Soil

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Secondary metabolites like pyrrolizidine alkaloids (PAs) play a crucial part in plant defense. We studied the effects of soil-borne microorganisms and soil-type on pyrrolizidine alkaloids in roots and shoots of Jacobaea vulgaris. We used clones of two genotypes from a dune area (Meijendel), propagated by tissue culture and grown on two sterilized soils and sterilized soils inoculated with 5% of non-sterilized soil of either of the two soil-types. Soil-borne microorganisms and soil-type affected the composition of PAs. By changing the composition rather than the total concentration below and aboveground, plants have a more complex defense strategy than formerly thought. Interestingly, a stronger negative effect on plant growth was found in sterilized soils inoculated with their 'own' microbial community suggesting that pathogenic and/or other plant inhibiting microorganisms were adapted to their 'own' soil conditions.

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Section: Introductionmentioning

confidence: 99%

Soil-borne microorganisms and soil-type affect pyrrolizidine alkaloids in Jacobaea vulgaris

Joosten

Mulder²,

Klinkhamer

et al. 2009

Plant Soil

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“…Plants defend themselves against herbivores either directly with the use of toxins, repellents, or morphological structures Karban and Baldwin 1997;Schoonhoven et al 1998;Agrawal and Rutter 1998;Baldwin and Preston 1999;, or indirectly by attracting the enemies of herbivores (Dicke and Sabelis 1988;Agrawal 1998;Dicke and Hilker 2003;Turlings and Wäcker 2004). The role of volatiles in the attraction of such natural enemies was first brought to light in studies on the interactions between arthropods and plant leaves.…”

Section: Introductionmentioning

confidence: 99%

Belowground Chemical Signaling in Maize: When Simplicity Rhymes with Efficiency

2008

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Maize roots respond to feeding by larvae of the beetle Diabrotica virgifera virgifera by releasing (E)-β-caryophyllene. This sesquiterpene, which is not found in healthy maize roots, attracts the entomopathogenic nematode Heterorhabditis megidis. In sharp contrast to the emission of virtually only this single compound by damaged roots, maize leaves emit a blend of numerous volatile organic compounds in response to herbivory. To try to explain this difference between roots and leaves, we studied the diffusion properties of various maize volatiles in sand and soil. The best diffusing compounds were found to be terpenes. Only one other sesquiterpene known for maize, α-copaene, diffused better than (E)-β-caryophyllene, but biosynthesis of the former is far more costly for the plant than the latter. The diffusion of (E)-β-caryophyllene occurs through the gaseous rather than the aqueous phase, as it was found to diffuse faster and further at low moisture level. However, a water layer is needed to prevent complete loss through vertical diffusion, as was found for totally dry sand. Hence, it appears that maize has adapted to emit a readily diffusing and cost-effective belowground signal from its insect-damaged roots.

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“…As DIH podem ter atuação direta, ao repelir herbívoros (De Moraes et al, 2001;Kessler & Baldwin, 2001), ou indireta, pela atração de inimigos naturais, como insetos, aves ou nematoides entomopatogênicos (Dudareva et al, 2006). As DIH podem variar qualitativa e quantitativamente de acordo com: a espécie do herbívoro que realiza a injúria na planta; a presença de diferentes espécies de herbívoros em uma mesma planta; o tipo de hábito alimentar (mastigador ou sugador) do inseto; o estágio fisiológico e a espécie da planta hospedeira (Dicke & Hilker, 2003;Fatouros et al, 2005;Moraes et al, 2005).…”

Section: Defenses Induced By Herbivory and Specific Interactions On Tunclassified

Defesas induzidas por herbivoria e interações específicas no sistema tritrófico soja-percevejos-parasitoides de ovos

Lopes

Diniz

Blassioli‐Moraes

et al. 2012

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a influência de voláteis de soja, induzidos pela herbivoria dos percevejos Euschistus heros e Nezara viridula, no comportamento de busca de hospedeiros dos parasitoides Telenomus podisi e Trissolcus basalis. Plantas injuriadas pela alimentação dos percevejos foram utilizadas como estímulos em bioensaios com fêmeas dos parasitoides, em olfatômetro de dupla escolha tipo Y. Telenomus podisi respondeu somente a voláteis liberados pela soja após a herbivoria de E. heros, seu hospedeiro preferencial. Trissolcus basalis não foi influenciado pelas plantas injuriadas pelos percevejos. Os resultados obtidos indicam existência de interações espécie-específicas no sistema tritrófico soja-percevejos-parasitoides de ovos.Termos para indexação: comportamento de busca, controle biológico, hospedeiro preferencial, interações tritróficas, olfatômetro de dupla escolha, voláteis de plantas. Defenses induced by herbivory and specific interactions on the tri-trophic system soybean-stink bug-egg parasitoidsAbstract -The objective of this work was to evaluate the influence of soybean volatiles, induced by the herbivory of the stink bugs Euschistus heros and Nezara viridula, on the host searching behavior of the parasitoids Telenomus podisi and Trissolcus basalis. Plants injured by the feeding activity of the stink bugs were used as stimuli in bioassays with parasitoid females in a two-choice Y type olfactometer. Telenomus podisi responded only to volatiles released by soybean after herbivory injury of E. heros, their preferential host. Trissolcus basalis did not respond to plants injured by the stink bugs. The obtained results indicate the existence of species-specific interactions in the tri-trophic system soybean-stink bug-egg parasitoids.

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Induced plant defences: from molecular biology to evolutionary ecology

Cited by 198 publications

References 91 publications

Soil-borne microorganisms and soil-type affect pyrrolizidine alkaloids in Jacobaea vulgaris

Soil-borne microorganisms and soil-type affect pyrrolizidine alkaloids in Jacobaea vulgaris

Belowground Chemical Signaling in Maize: When Simplicity Rhymes with Efficiency

Defesas induzidas por herbivoria e interações específicas no sistema tritrófico soja-percevejos-parasitoides de ovos

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