Biosynthetic pathways of the pheromone of the Egyptian armyworm <i>Spodoptera littoralis</i>

Muñoz, Lourdes; Rosell, Glòria; Quero, Carmen; Guerrero, Ángel

doi:10.1111/j.1365-3032.2008.00645.x

Cited by 32 publications

(41 citation statements)

References 156 publications

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“…Each biological process identified as part of the biological pathway of pheromone production in Spodoptera littoralis [3] is characterized and implemented in a modular microchip system. The microreactor modules produce intermediate chemical species and combining the modules in a hierarchical structure enables the production of an almost limitless diversity of pheromone compounds.…”

Section: A Chemoemittermentioning

confidence: 99%

Biomimetic insect infochemical communication system

Cole

Gardner²,

Rácz

et al. 2009

2009 IEEE Sensors

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Abstract-By exploiting recent advances in both our understanding of pheromone biosynthesis pathways and the detection of molecules in the insect nervous system, we are developing a novel communication system based on functional equivalents of the cellular, sub-cellular and molecular biological machinery. This will form the basis of a new branch of information technology employing infochemical ligands for communication over space and time. In order to achieve this objective, both chemical signal generation and reception are replicated by taking a systematic approach that implements reaction steps as biosynthetic modules, which are then hierarchically integrated as a technological solution towards realising 'infochemical communication'.

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Section: A Chemoemittermentioning

confidence: 99%

Biomimetic insect infochemical communication system

Cole

Gardner²,

Rácz

et al. 2009

2009 IEEE Sensors

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“…The sex pheromone of moths normally consists of several compounds, and the species specificity depends on the combination of compounds and/or the ratio of these. In S. littoralis, the pheromone consists of several compounds, with (Z,E)-9,11-tetradecadienyl acetate (ZE-9,11-14:OAc) as the main component (24,25). S. littoralis males use a highly specialized and very sensitive olfactory system to detect and discriminate sex pheromones in their environment.…”

mentioning

confidence: 99%

Brief predator sound exposure elicits behavioral and neuronal long-term sensitization in the olfactory system of an insect

Anton¹,

Evengaard

Barrozo

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

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Modulation of sensitivity to sensory cues by experience is essential for animals to adapt to a changing environment. Sensitization and adaptation to signals of the same modality as a function of experience have been shown in many cases, and some of the neurobiological mechanisms underlying these processes have been described. However, the influence of sensory signals on the sensitivity of a different modality is largely unknown. In males of the noctuid moth, Spodoptera littoralis, the sensitivity to the femaleproduced sex pheromone increases 24 h after a brief preexposure with pheromone at the behavioral and central nervous level. Here we show that this effect is not confined to the same sensory modality: the sensitivity of olfactory neurons can also be modulated by exposure to a different sensory stimulus, i.e., a pulsed stimulus mimicking echolocating sounds from attacking insectivorous bats. We tested responses of preexposed male moths in a walking bioassay and recorded from neurons in the primary olfactory center, the antennal lobe. We show that brief exposure to a bat call, but not to a behaviorally irrelevant tone, increases the behavioral sensitivity of male moths to sex pheromone 24 h later in the same way as exposure to the sex pheromone itself. The observed behavioral modification is accompanied by an increase in the sensitivity of olfactory neurons in the antennal lobe. Our data provide thus evidence for cross-modal experience-dependent plasticity not only on the behavioral level, but also on the central nervous level, in an insect.bat sound | plant odor | sexual behavior | intracellular recording A nimals live in an ever-changing environment and must be able to adapt their behavior in response to highly varying sensory cues. One way to achieve such adaptive behavior is through plasticity of the nervous system, whereby modifications can be induced depending on sensory input. Previous studies have shown that exposure to environmental signals during development and in early adult life might influence the precise design and sensitivity of the targeted sensory system (1-3). The development of the peripheral and central visual, auditory, somatosensory, and olfactory systems in vertebrates has been shown to be highly influenced by experience (e.g., refs. 4-11) and regulated by neurogenesis and network remodeling with, for example, axon growth, the increase of the number of synaptic connections, and the strengthening of existing synapses (ref. 1 and references therein; ref. 12).Different strategies to achieve high sensitivity for abundant and/ or important signals have evolved. One way is limited attention, whereby an animal focuses on a specific sensory system, or even on a specific type of sensory signal, whereas other, simultaneously occurring information signals might be less attended (13,14). Experience of sensory input with a behaviorally important stimulus could also elicit long-term changes, which improve the insect's ability to respond to that specific stimulus (e.g., ref. 15). Furthermore, brief s...

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Section: Introductionmentioning

confidence: 99%

“…Such variation has generally been hypothesized to be due to selection and genetic control of these differences (Vogel et al, 2010). The composition of the female pheromone glands S. littoralis is highly dependent on the origin of the strain and its geographical distribution (Campion et al, 1980;Quero et al, 1996;Muñoz et al, 2008; Carot-Sans et al, 2015).Indeed the sex pheromones have been determined for more than a thousand moth species aimed to identify optimal blends to attract males (Ando and Yamakawa, 2011 ; ElSayed, 2014 littoralis is largely undocumented. Therefore, the present study analyzes and identifies the chemical components of the female pheromone gland at four different ages to assess their variation in amount and composition with age of adult S. littoralis.…”

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confidence: 99%

Age-related changes in the chemical composition of female pheromone gland of the Egyptian cotton leafworm, Spodoptera littoralis (Lepidoptera: Noctuidae)

El-Gashingy¹,

Naiem²,

Seada³

et al. 2018

Egypt. J. Exp. Biol. (Zoo.)

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Do h a H e s h a m E l -Ga s h i n g y El-S a e i d A h me d N a i e m M e r v a t Ra f e i k A b o u S e a d a A m a l I b r a h i m S e i fAge-related changes in the chemical composition of female pheromone glands of the Egyptian cotton leafw orm, Spodoptera littoralis (Lepidoptera: Noctuidae) ABSTRACT:The Egyptian cotton leafworm, Spodoptera littoralis (Lepidoptera: Noctuidae) is a serious pest that attacks a wide range of crops in Egypt. To relate the age with the chemical composition of the pheromone glands of the female S. littoralis, the chemical components of the glands were analyzed using gas chromatography coupled to mass spectrometry (GC -MS). The pheromone glands of the females were excised at four different ages: newly emerged (D 0 v), one-dayold (D1v), two-day-old (D2v), three-day-old (D3v) and three-day-old mated females (D3m). The pheromone glands contained 54 compounds in the hexane extract, (1 ketone, 1 acetate, 2 fatty acids, 3 esters, 6 aldehydes, 12 alcohols and 29 hydrocarbons). The presence and relative amounts of th ese compounds in the gland varied with age. Few compounds were observed in the glands of D0v, increased in D1v, D2v, and D3v, and remained almost constant in D 3 m. Fifteen compounds were previously identified as sex pheromone components in other Lepidoptera ; the major compounds were the two hydrocarbons, hentriacontane and heptacosane. Another fifteen components were previously identified from different insect orders other than Lepidoptera. The other twenty-four compounds were identified for the first time in insects. Determination and identification the sex pheromones of S. littoralis may present safe biologically active compounds that could be used in the management programs for this pest in Egypt. KEY WORDS:Spodoptera littoralis, Pheromone glands, Gas chromatography and Lepidoptera CORRESPONDENCE:Do h a H e s h a m E l -Ga s h i n g y Entomology Section, Zoology Department, Faculty of Science, Tanta University, Egypt INTRODUCTION:In the last four decades, there have been extensive researches on insect semiochemicals "The Pherobaseˮ (El-Sayed, 2014).They are chemical compounds implicated in the transfer of information from one individual to another to trigger a behavioral and physiological response in one or both insects (Dicke and Sabelis, 1988 and W olf, 1988; Ando et al., 2004). In Lepidoptera these compounds "The Pherobaseˮ (El-Sayed, 2014) play different roles.Virgin Lepidoptera females emit sex pheromones which cause attraction of males to the location of the female and subsequently, mating takes place (Kingan et al., 1993).In moths pheromone communication signals, both quantitative and qualitative intraspecific differences have been found across geographic regions (Klun, 1975;Roelofs et al., 1985). Such variation has generally been hypothesized to be due to selection and genetic control of these differences (Vogel et al., 2010). The composition of the female pheromone glands S. littoralis is highly dependent on the origin of the strain and its geographical distri...

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Biosynthetic pathways of the pheromone of the Egyptian armyworm Spodoptera littoralis

Cited by 32 publications

References 156 publications

Biomimetic insect infochemical communication system

Biomimetic insect infochemical communication system

Brief predator sound exposure elicits behavioral and neuronal long-term sensitization in the olfactory system of an insect

Age-related changes in the chemical composition of female pheromone gland of the Egyptian cotton leafworm, Spodoptera littoralis (Lepidoptera: Noctuidae)

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