Response properties of lobster chemoreceptors: tuning of primary taste neurons in walking legs

Johnson, Bruce; Voigt, Rainer; Borroni, Paola; Atema, Jelle

doi:10.1007/bf00610845

Cited by 49 publications

(46 citation statements)

References 52 publications

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“…Alternatively, suppression of TTX-stimulated predator avoidance responses in newt larvae might arise from noncompetitive interactions within the peripheral (Johnson et al, 1984;Johnson et al, 1985) or central nervous system (Kang and Caprio, 1995;Giraudet et al, 2002;Wilson, 2003), or both (Derby and Ache, 1984). A feasible peripheral non-competitive mechanism is TTX and arginine binding at different receptor sites on the same chemosensory receptor cell.…”

Section: Discussionmentioning

confidence: 99%

The scent of danger: arginine as an olfactory cue of reduced predation risk

Ferrer

Zimmer

2007

Journal of Experimental Biology

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SUMMARY Animal perception of chemosensory cues is a function of ecological context. Larvae of the California newt (Taricha torosa), for example, exhibit predator-avoidance behavior in response to a chemical from cannibalistic adults. The poison tetrodotoxin (TTX), well known as an adult chemical defense, stimulates larval escape to refuges. Although they are cannibals,adult newts feed preferentially on worms (Eisenia rosea) over conspecific young. Hence, larval avoidance reactions to TTX are suppressed in the presence of odor from these alternative prey. The free amino acid,arginine, is abundant in fluids emitted by injured worms. Here, we demonstrate that arginine is a natural suppressant of TTX-stimulated larval escape behavior. Compared to a tapwater control, larvae initiated vigorous swimming in response to 10–7 mol l–1 TTX. This excitatory response was eliminated when larval nasal cavities were blocked with an inert gel, but not when gel was placed on the forehead (control). In additional trials, a binary mixture of arginine and 10–7 mol l–1 TTX failed to induce larval swimming. The inhibitory effect of arginine was, however, dose dependent. An arginine concentration as low as 0.3-times that of TTX was significantly suppressant. Further analysis showed that suppression by arginine of TTX-stimulated behavior was eliminated by altering the positively-charged guanidinium moiety, but not by modifying the carbon chain, carboxyl group, or amine group. These results are best explained by a mechanism of competitive inhibition between arginine and TTX for common, olfactory receptor binding sites. Although arginine alone has no impact on larval behavior, it nevertheless signals active adult predation on alternative prey, and hence, reduced cannibalism risk.

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Section: Discussionmentioning

confidence: 99%

The scent of danger: arginine as an olfactory cue of reduced predation risk

Ferrer

Zimmer

2007

Journal of Experimental Biology

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“…In contrast to the antennular receptors described above, "narrowly tuned" glutamate chemoreceptors appear to comprise a major portion of the chemoreceptor population of the walking legs of the American lobster, H. americanus (26,35). In experiments examining the structure-activity relationships for activation of these cells, all of the glutamate analogs tested (Fig.…”

Section: Lobster Glutamatergic Chemoreceptorsmentioning

confidence: 89%

“…Although not as extensively studied in H. amerncanus, taurine-sensitive chemoreceptors on the antennules (95,96) and walking legs (26,35) pressed, and in fact tended to be slightly greater than with taurine presented alone (29). The mechanism of the above mixture suppression is not understood.…”

Section: Lobster Taurinergic Chemoreceptorsmentioning

confidence: 94%

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Chemoreceptors of Crustaceans: Similarities to Receptors for Neuroactive Substances in Internal Tissues

Carr¹,

Ache²,

Gleeson³

1987

Environmental Health Perspectives

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A description is given of crustacean chemosensory systems and the neurophysiological procedures used to study them. Their response properties and tuning characteristics are discussed. A review is then provided of specific crustacean chemoreceptors that are stimulated selectively by either purine nucleotides, taurine, glutamate, or glycine, all of which have neuroactive properties in internal tissues.Two distinctly different types of purinergic chemoreceptors occur on the antennules of the spiny lobster.P,-Iike chemoreceptors have a potency sequence of AMP > ADP > ATP > adenosine and show a strict structural requirement for the ribose phosphate moiety. P2-like chemoreceptors have a potency sequence of ATP > ADP > AMP or adenosine and show a broad sensitivity to nucleotide triphosphates with modifications in both the purine and ribose phosphate moieties. Sensilla containing the dendrites of chemosensory neurons also possess an ectonucleotidase(s) that inactivates excitatory nucleotides to yield adenosine which is subsequently internalized by a sensillar uptake system. Narrowly tuned taurinergic chemoreceptors are present on both the antennules and legs of lobsters. Although taurine itself is the most effective stimulant, the taurine analogs hypotaurine and ,B-alanine are also very excitatory. Structure-activity studies indicate these chemoreceptors have marked similarities to taurine-sensitive systems in internal tissues of vertebrates. By contrast, comparative studies of glutamatergic chemoreceptors on the legs of lobsters indicate response spectra different from those of the glutamate receptors in lobster neuromuscular junctions and the three classes of excitatory amino acid receptors identified internally in vertebrates. Crustacean chemoreceptors for glycine, ecdysteroids, and pyridine are also described. The hypothesis that receptors for internal neuroactive agents may have originally evolved as external chemoreceptors of primitive aquatic organisms is discussed. IntroductionThe chemical senses of many aquatic animals are extremely well developed. Waterborne chemicals influence facets of behavior as diverse as food finding (1,2), predator avoidance (3,4), mate recognition and mating (5,6), substrate selection and metamorphosis by larvae (7,8), homing by migratory species (9,10), and species recognition and social behavior (11,12). Chemoreception in aquatic animals has been reviewed recently (3,(13)(14)(15).Chemosensory studies have revealed that many of the external chemical agents stimulating behavioral and physiological responses in aquatic invertebrates are the very same substances that function internally in higher organisms as either transmitters or modulators. This paper will briefly describe crustacean chemosensory systems and the physiological procedures used to study them. A description will then be provided of specific crustacean chemoreceptors that are stimulated by sub- Chemosensory Systems in Decapod CrustaceansBecause of their large size and easily accessible chemosensory organs, certain decapod...

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“…Status is controlled in the process by careful selection of the right combinations of crayfish in the ends, between winners and losers and familiar versus unfamiliar animals from the first encounter. Further detail Van der Velden et al (2008) In clawed lobsters, where the most extensive studies have taken place, the most important receivers of urine signals are the aesthetasc hairs on the antennules (Hallberg and Skog 2011), although similar receptors are found elsewhere, particularly on the mouthparts and periopods (Johnson et al 1984). Interference by amputation or mechanical blocking of the hairs to reduce or remove the signals appear to reduce or even abolish transfer of sexual information (Homarus americanus, Bushman and Atema 1997) although there may be some gender differences in the other homarid species (H. gammarus -Skog 2009a, b).…”

Section: Chemical Communication and Recognition In Crayfishmentioning

confidence: 99%

To What Extent Can Freshwater Crayfish Recognise Other Crayfish?

Patullo

Macmillan

2015

Social Recognition in Invertebrates

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The ability for sophisticated and flexible recognition by vertebrates has been known for a very long time, probably because it features so strongly in human social behaviour and is therefore easily recognised in other species. As evidenced by the increasing number of studies and reports (Tibbets and Dale 2007), recent years have seen increased interest in the occurrence and properties of this response in non-vertebrates where it may not be so easily identified. Studies have now been undertaken on a wide range of organisms exemplified by the chapters of this review collection but our understanding of this phenomenon is still at an early stage and we can make few generalisations beyond its wide occurrence. In retrospect, its incidence should not be surprising. The advantages that it confers are apparent so that, all things being equal, it should be selected for. What characteristics of life history and interaction with con-specifics are likely to predict its presence and what factors predict the level of sophistication and flexibility? These questions remain to be answered but, based on what has already been discovered, we postulate here that it will evolve wherever there is a capacity for analysis of sensory signals that carry identifying information.The focus of our chapter is to summarise the present state of knowledge concerning recognition in freshwater crayfish. When discussing this topic, it is not possible to consider crayfish alone because, at this stage, only limited data are available from crayfish species. So here we will refer to some findings from lobsters and other decapod species to provide a context for linking the known elements for crayfish. In the text we use the various degrees of "recognition" according to the definitions developed by Gherardi et al. (2005). We will deal with chemical recognition first, then with visual recognition and, even though there is a

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Response properties of lobster chemoreceptors: tuning of primary taste neurons in walking legs

Cited by 49 publications

References 52 publications

The scent of danger: arginine as an olfactory cue of reduced predation risk

The scent of danger: arginine as an olfactory cue of reduced predation risk

Chemoreceptors of Crustaceans: Similarities to Receptors for Neuroactive Substances in Internal Tissues

To What Extent Can Freshwater Crayfish Recognise Other Crayfish?

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