Chemical Protection of Insect Eggs

Blum, Murray S.; Hilker, Monika

doi:10.1002/9780470760253.ch3

Cited by 45 publications

(49 citation statements)

References 150 publications

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“…In addition, they may contain a variety of other biologically active components, such as prostaglandins in Lepidoptera (Gillott, 1988), juvenile hormone (JH) in the moth Hyalophora cecropia (Shirk et al, 1980) and possibly also in some mosquitoes (Borovsky et al, 1994), and toxic compounds that have been suggested to serve as egg protectants (Blum and Hilker, 2002;Eisner et al, 2002).…”

Section: Male Accessory Gland (Mag) Products and Their Function In Inmentioning

confidence: 99%

She’s my girl - male accessory gland products and their function in the reproductive biology of social bees

Colonello-Frattini

Hartfelder

2005

Apidologie

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-Male accessory gland products have become a major issue in insect reproduction. They are a means of transport for sperm and can form a mating plug, and also have specific compounds that can modify the behavior and physiology of mated females. We briefly review the structure and function of accessory gland products in insects, especially in the fruitfly and some orthopterans and lepidopterans, and draw parallels to what is currently known in social bees. The structure of the mating sign differs considerably in this group. In bumble bees it consists of a viscous mass of a dipeptide and fatty acids, with linoleic acid affecting female behavior. The honey bees show considerable species-specific variation in their mating signs. In the cavity-dwelling species it is the mucus gland which provides the mass of the mating sign, and this glands undergoes a hormonally controlled sexual maturation in its program of protein synthesis. The stingless bees lack mucus glands altogether, and their mating sign consists of the ruptured genital capsule of the male. We discuss the structure of the mating sign and of its components in relation to the mating and reproductive biology of these groups of highly eusocial bees.honeybee / bumblebee / Meliponini / reproductive tract / mating sign / Apis / Bombus

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Section: Male Accessory Gland (Mag) Products and Their Function In Inmentioning

confidence: 99%

She’s my girl - male accessory gland products and their function in the reproductive biology of social bees

Colonello-Frattini

Hartfelder

2005

Apidologie

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“…In the words of Stadler ( 2002 ), an eminent researcher in the insect-plant relation fi eld, 'odour of plants, the plant surface and the plant's interior guide egg-laying herbivorous insects to their host plants and infl uence the choice of oviposition sites'. The plant-produced toxins may protect the eggs from egg predators and parasitoids (Blum and Hilker 2002 ). The concentration of leaf volatile and atmospheric gases present in the leaf boundary layer surrounding the eggs may specifi cally affect embryonic development.…”

Section: Behavioural Effects Of Volatiles On Herbivore Insectsmentioning

confidence: 99%

Plant Volatile Chemicals and Insect Responses

Rani

2015

Plant Biology and Biotechnology

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Insects are the most dominating, interesting, and curious forms of life exceeding in numbers as well as species. Among these more than 50 % exploit plants for their feeding, oviposition, and even as habitat. Almost all plants are constantly challenged with facing trade-off between AbstractProduction and emission of volatile organic chemicals (VOCs) is a general phenomenon in most of the plant communities. Insects respond to plant chemicals in a variety of interesting ways which has tremendous potential in pest management programmes. In a normal state, plants release a spectrum of species-specifi c VOCs through their leaf, stem, fl ower, and even root surfaces, and they become host location cues to insects leading to their colonisation on the plant, whereas the plants damaged by insect feeding emit qualitatively and quantitatively different volatiles that become host/prey location signals to the wandering insect natural enemies causing the reduction of the pest population. In addition to this, plant volatiles synergise or deter the insect sex pheromonal activities. Insects possess excellent chemosensory system for detection of volatile chemicals. The advent of electrophysiology, scanning, and transmission electron microscopic techniques made insect sensory physiology/morphology an admirable tool to unravel the mechanisms underlying the insect responses to plant volatile compounds.

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“…Chemical protection of eggs is, of course, a well known phenomenon. There are numerous examples of autogenously produced or plant-acquired chemicals used by insects to protect their eggs and offspring (for review see Blum & Hilker 2002). This defense can be provided maternally, paternally or by both parents (for review see Eisner et al 2002).…”

Section: Transfer Of Larval Pas Through the Life-stagesmentioning

confidence: 99%

Phenological fate of plant-acquired pyrrolizidine alkaloids in the polyphagous arctiid Estigmene acrea

Hartmann

Theuring

Beuerle

et al. 2004

Evolutionary, Mechanistic and Environmental Approaches to Chemi

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The alkaloid profiles of the life history stages of the highly polyphagous arctiid Estigmene acrea were established. As larvae individuals had free choice between a plain diet (alkaloid-free) and a diet that was supplemented with Crotalaria-pumila powder with a known content and composition of pyrrolizidine alkaloids (PAs). Idiosyncratic retronecine esters (insect PAs) accounted for approximately half of the PAs recovered from the larvae. These alkaloids were synthesized by the larvae through esterification of dietary supinidine yielding the estigmines, and esterification of retronecine yielding the creatonotines. The retronecine is derived from insect-mediated degradation of the sequestered pumilines (macrocyclic PAs of the monocrotaline type). With one exception, the PA profiles established for larvae were found almost unaltered in all life-stages as well as larval exuviae and pupal cocoons. The exception is the males, which in comparison to pupae and adult females, showed a significantly decreased quantity of the creatonotines and pumilines. These data support the idea that the creatonotines are direct precursors of the PA-derived male courtship pheromone, hydroxydanaidal. Crosses of PA-free males with PA-containing females and vice versa confirmed an efficient trans-mission of PAs from males to females and then from females to eggs. In single cases a male bestowed almost his total PA load to the female, and a female her total load to the eggs. The results are discussed with respect to pheromone formation, PA transmission between life-stages, and the defensive role of PAs against predators and parasitoids.

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Chemical Protection of Insect Eggs

Cited by 45 publications

References 150 publications

She’s my girl - male accessory gland products and their function in the reproductive biology of social bees

She’s my girl - male accessory gland products and their function in the reproductive biology of social bees

Plant Volatile Chemicals and Insect Responses

Phenological fate of plant-acquired pyrrolizidine alkaloids in the polyphagous arctiid Estigmene acrea

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