Hypersensitivity and Egg Drop: A Novel Mechanism of Host Plant Resistance to Colorado Potato Beetle (Coleoptera: Chrysomelidae)

Balbyshev, N.; Lorenzen, J.

doi:10.1093/jee/90.2.652

Cited by 77 publications

(77 citation statements)

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“…Indeed, some plant species show a 'hypersensitive response' to oviposition. When eggs are deposited onto their leaves, the tissue around the egg rapidly turns necrotic and in some cases falls off (Balbyshev and Lorenzen, 1997;Shapiro and DeVay, 1987). Because it no longer transpires, the necrotic tissue can get hot enough to kill the egg.…”

Section: K Potter G Davidowitz and H A Woodsmentioning

confidence: 99%

Insect eggs protected from high temperatures by limited homeothermy of plant leaves

Potter

Davidowitz

Woods

2009

Journal of Experimental Biology

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SUMMARYVirtually all aspects of insect biology are affected by body temperature, and many taxa have evolved sophisticated temperaturecontrol mechanisms. All insects, however, begin life as eggs and lack the ability to thermoregulate. Eggs laid on leaves experience a thermal environment, and thus a body temperature, that is strongly influenced by the leaves themselves. Because plants can maintain leaf temperatures that differ from ambient, e.g. by evapotranspiration, plant hosts may protect eggs from extreme ambient temperatures. We examined the degree to which leaves buffer ambient thermal variation and whether that buffering benefits leaf-associated insect eggs. In particular, we: (1) measured temperature variation at oviposition sites in the field, (2) manipulated temperatures in the laboratory to determine the effect of different thermal conditions on embryo development time and survival, and (3) tested embryonic metabolic rates over increasing temperatures. Our results show that Datura wrightii leaves buffer Manduca sexta eggs from fatally high ambient temperatures in the southwestern USA. Moreover, small differences in temperature profiles among leaves can cause large variation in egg metabolic rate and development time. Specifically, large leaves were hotter than small leaves during the day, reaching temperatures that are stressfully high for eggs. This study provides the first mechanistic demonstration of how this type of leaf-constructed thermal refuge interacts with egg physiology.

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Section: K Potter G Davidowitz and H A Woodsmentioning

confidence: 99%

Insect eggs protected from high temperatures by limited homeothermy of plant leaves

Potter

Davidowitz

Woods

2009

Journal of Experimental Biology

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“…Only certain individuals of the mustard population showed the ability of hypersensitive response. (2) Balbyshev & Lorenzen (1997) describe the formation of necrotic tissue in a specific line of a Solanum species after oviposition by Leptinotarsa decemlineata. The hypersensitive responses of both the Solanum and Brassica plants suggest a high specificity, since only a specific line or certain individuals of a population respond to egg deposition by the herbivore.…”

Section: Formation Of Neoplasmsmentioning

confidence: 99%

“…In both studies, microorganisms associated with the eggs have almost been excluded to act as elicitors of the hypersensitive response. In the Brassica -Pieris interaction, the elicitor of the response is located in the egg cement, since eggs themselves do not stimulate formation of necrotic tissue (Balbyshev & Lorenzen, 1997).…”

Section: Formation Of Neoplasmsmentioning

confidence: 99%

Induction of plant responses to oviposition and feeding by herbivorous arthropods: a comparison

Hilker

Meiners

2002

Entomologia Exp Applicata

136

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Plants may respond both to feeding and oviposition by herbivorous insects. While responses of plants to feeding damage by herbivores have been studied intensively during the past decades, only a few, but growing number of studies consider the reactions of plants towards egg deposition by herbivorous insects. Plants showing defensive response to oviposition by herbivores do not 'wait' until being damaged by feeding, but may instead react towards one of the initial steps of herbivore attack, the egg deposition. Direct plant defensive responses to feeding act directly against the feeding stages of the herbivores. However, a plant may also show direct defensive responses to egg deposition by (a) formation of neoplasms, (b) formation of necrotic tissue (= hypersensitive response), and (c) production of oviposition deterrents. All these plant reactions have directly negative effects on the eggs, hatching larvae, or on the ovipositing females. Indirect plant defensive responses to feeding result in the emission of volatiles (= synomones) that attract predators or parasitoids of the feeding stages. A few recent studies have shown that plants are able to emit volatiles also in response to egg deposition and that these volatiles attract egg parasitoids. Studies on the mechanisms of induction of synomones by egg deposition show several parallels to the mechanisms of induction of plant responses by feeding damage. When considering induced plant defence against herbivores from an evolutionary point of view, the question arises whether herbivores evolved the ability to circumvent or even to exploit the plant's defensive responses. The reactions of herbivores to oviposition induced plant responses are compared with their reactions to feeding induced plant responses.

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“…From the plants' perspective, mobilizing defenses upon egg deposition may represent an effective strategy to reduce herbivory, as the resistance mechanisms can be activated before the onset of feeding Hilker and Meiners 2006). Indeed, it has been demonstrated that plants after contacting eggs can grow neoplasms, initiate tissue necrosis (hypersensitive response), or produce ovicidal substances in order to kill eggs or isolate hatching larvae from plant tissue (Blackmeer et al 1994;Seino et al 1996;Balbyshev and Lorenzen 1997;Doss et al 2000;Hilker and Meiners 2002). After oviposition, plants can also release volatiles that are attractive to egg parasitoids (Hilker and Meiners 2002) or change chemicals on the leaf surface that arrest egg parasitoids (Fatouros et al 2005(Fatouros et al , 2007.…”

Section: Introductionmentioning

confidence: 99%

Oviposition by a moth suppresses constitutive and herbivore-induced plant volatiles in maize

Peñaflor

Erb

Robert

et al. 2011

Planta

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Plant volatiles function as important signals for herbivores, parasitoids, predators, and neighboring plants. Herbivore attack can dramatically increase plant volatile emissions in many species. However, plants do not only react to herbivore-inflicted damage, but also already start adjusting their metabolism upon egg deposition by insects. Several studies have found evidence that egg deposition itself can induce the release of volatiles, but little is known about the effects of oviposition on the volatiles released in response to subsequent herbivory. To study this we measured the effect of oviposition by Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) moths on constitutive and herbivore-induced volatiles in maize (Zea mays L.). Results demonstrate that egg deposition reduces the constitutive emission of volatiles and suppresses the typical burst of inducible volatiles following mechanical damage and application of caterpillar regurgitant, a treatment that mimics herbivory. We discuss the possible mechanisms responsible for reducing the plant's signaling capacity triggered by S. frugiperda oviposition and how suppression of volatile organic compounds can influence the interaction between the plant, the herbivore, and other organisms in its environment. Future studies should consider oviposition as a potential modulator of plant responses to insect herbivores.

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Hypersensitivity and Egg Drop: A Novel Mechanism of Host Plant Resistance to Colorado Potato Beetle (Coleoptera: Chrysomelidae)

Cited by 77 publications

References 0 publications

Insect eggs protected from high temperatures by limited homeothermy of plant leaves

Insect eggs protected from high temperatures by limited homeothermy of plant leaves

Induction of plant responses to oviposition and feeding by herbivorous arthropods: a comparison

Oviposition by a moth suppresses constitutive and herbivore-induced plant volatiles in maize

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