Modulation of<i>Mytilus trossulus</i>(Bivalvia: Mollusca) larval survival and growth in culture

Вехова, Е. Е.; Ivashkin, Evgeny; Yurchenko, Olga V.; Chaban, Anastasia K; Dyachuk, Vyacheslav; Khabarova, Marina Yu.; Voronezhskaya, Elena E.

doi:10.1556/abiol.63.2012.suppl.2.31

Cited by 4 publications

(4 citation statements)

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“…Thus, both may be involved in the regulation of locomotion, distribution, and defensive behavior. In addition, the FMRFamide peptide family modulates ligand-gated channels that transport Na + and associated water, rendering larvae resistant to osmotic pressure [29, 59–62]. FMRFamide, expressed in the early peripheral neurons of bivalve and gastropod larvae [3, 14, 21, 48], has been suggested to modulate their behavior in response to environmental changes (for example, in salinity, temperature, and pH) in their ecological niche, where appropriate movement in the water column determines successful survival.…”

Section: Unsolved Questions On Lophotrochozoans Neurodevelopmentmentioning

confidence: 99%

Peripheral sensory neurons govern development of the nervous system in bivalve larvae

Yurchenko

Savelieva

Kolotuchina

et al. 2019

EvoDevo

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Recent findings regarding early lophotrochozoan development have altered the conventional model of neurogenesis and revealed that peripheral sensory elements play a key role in the initial organization of the larval nervous system. Here, we describe the main neurogenetic events in bivalve mollusks in comparison with other Lophotrochozoa, emphasizing a novel role for early neurons in establishing larval nervous systems and speculating about the morphogenetic function of the apical organ. We demonstrate that during bivalve development, peripheral sensory neurons utilizing various transmitters differentiate before the apical organ emerges. The first neurons and their neurites serve as a scaffold for the development of the nervous system. During veliger stage, cerebral, pleural, and visceral ganglia form along the lateral (visceral) nerve cords in anterior-to-posterior axis. The pedal ganglia and corresponding ventral (pedal) nerve cords develop much later, after larval settlement and metamorphosis. Pharmacological abolishment of the serotonin gradient within the larval body disrupts the navigation of “pioneer” axons resulting in malformation of the whole nervous system architecture. Comparative morphological data on neurogenetic events in bivalve mollusks shed new light on the origin of the nervous system, mechanisms of early axon navigation, and sequence of the tetraneurous nervous system formation. Furthermore, this information improves our understanding of the basic nervous system architecture in larval Bivalvia and Mollusca.

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Section: Unsolved Questions On Lophotrochozoans Neurodevelopmentmentioning

confidence: 99%

Peripheral sensory neurons govern development of the nervous system in bivalve larvae

Yurchenko

Savelieva

Kolotuchina

et al. 2019

EvoDevo

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“…The marine bivalve Crenomytilus grayanus proved to be very sensitive to changes in salinity, which could block feeding and retard larval growth (Yaroslavtseva and Sergeeva, 2010). Moreover, it was shown that changes in salinity have an impact on the growth and survival of the larvae of another marine bivalve, Mytilus trossulus, influencing simultaneously the expression of 5-HT and FMRFa immunoreactivities (Vekhova et al, 2012). In the marine snail Ilyanassa obsoleta, acidic seawater was found to stimulate metamorphosis, a process also regulated by different transmitter systems, such as 5-HT, nitric oxide, and FMRFamide (Leise and Cahoon, 2012;Leise et al, 2014).…”

Section: Functional-physiological Considerationsmentioning

confidence: 99%

Neuronal Development in the Larvae of the Invasive BiofoulerDreissena polymorpha(Mollusca: Bivalvia), with Special Attention to Sensory Elements and Swimming Behavior

Battonyai

Voronezhskaya

Obukhova

et al. 2018

The Biological Bulletin

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Although understanding of the neuronal development of Trochozoa has progressed recently, little attention has been paid to freshwater bivalves, including species with a strong ecological impact, such as the zebra mussel (Dreissena polymorpha). Therefore, an important question might concern how the developing nervous system is involved in the formation of the rapid and successful invasive behavior of this species. Our aim was to reveal the neuronal development of trochophore and veliger larvae of Dreissena, with special attention to the organization of sensory structures and their possible involvement in detecting environmental cues. After applying serotonin and FMRFamide immunocytochemistry, the first serotonin immunoreactive sensory elements appeared 16-18 hours after fertilization, whereas the first FMRFamide immunoreactive sensory cell was seen only at 32 hours of development (trochophore stage). Later, sensory elements were found in three parts of the larval body, including the apical organ, the posterior region, and the stomach. Although differences in the timing of appearance and the morphology of cells were observed, the two signaling systems showed basic similarity in their organization pattern until the end of the veliger stage. Pharmacological, physiological, and quantitative immunocytochemical investigations were also performed, suggesting the involvement of both the serotoninergic system and the FMRFamidergic system in sensomotor processes. Manipulation of the serotonin synthesis by para-chloroplenylalanine and 5-hydroxytryptophane, as well as application of increased salinity, influenced larval swimming activity, both accompanied by changes in immunofluorescence intensity. We concluded that these two early sensory systems may play an important role in the development of settlement competency of this biofouling invasive bivalve, Dreissena.

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“…Among all other organ systems of mollusks, the nervous system and its neurotransmitters are of great importance in the regulation of homeostasis in general, and particularly in various physiological processes; such as regulation of locomotor activity [9], contraction of striated and smooth (catch) muscles including the heart [2,4], regulation of metabolism [10], circulation, feeding, digestion, reproduction, and osmoregulation [11][12][13][14][15]. In addition, the modulation of neurotransmitter expression leads to a change in the rate of larval development [16].…”

Section: Introductionmentioning

confidence: 99%

Neurogenesis of the scallop Azumapecten farreri: from the first larval sensory neurons to the definitive nervous system of juveniles

Kniazkina

Dyachuk

2022

Front Zool

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Background Scallops are among the best-studied bivalve mollusks. However, adult nervous system and neurogenesis studies of scallops are limited. Here, we studied the localization of neurotransmitters (serotonin/5-HT, FMRFamide, catecholamines) in adult ganglia and larvae of Azumapecten farreri using histochemical and immunohistochemical methods. Results We found peptide FMRFamide in all adult scallop ganglia, whereas 5-HT-like immunoreactive (lir) somata were exclusively detected in the cerebropleural, pedal, and accessory ganglia. Scallop larval neurogenesis starts with the emergence of the 5-HT-lir neurons, which are part of the apical organ (AO) at the early veliger stage. Near the AO, paired anlagen of cerebral ganglion (CG) developed. 5-HT-lir neurites of the CG innervate the velum, ventral, and dorsal parts of the larva at the late veliger stage. Scallop pediveligers possess 5-HT-lir CG, pleural ganglia, and immunopositive signals in the developing enteric nervous system. FMRFamide-lir is first detected in dorsal, ventral, and AO cells of early veligers. Later, FMRFamide-lir extends to the visceral nervous cord, all ganglia, as well as in the enteric nervous system in pediveligers. Catecholaminergic neurons are detected near the larval mouth, in the vellum, and in the stomach in veligers. Conclusions We described the distribution of neurotransmitters of the ganglia in adult scallops and the larval neurodevelopment in A. farreri. Immunostaining of neurotransmitters showed that the gross anatomy of adult scallop ganglia, in general, is similar to that in other bivalves, but complicated by the complexity of the structure of the ganglia and the appearance of additional ganglia not described in other molluscs. A comparison of larval neuromorphology suggests that 5-HT-lir structures are more conservative than FMRF-lir structures in Bivalvia. Notably, the latter are much more distributed in scallop A. farreri larvae than in other studied bivalves.

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Modulation ofMytilus trossulus(Bivalvia: Mollusca) larval survival and growth in culture

Cited by 4 publications

References 4 publications

Peripheral sensory neurons govern development of the nervous system in bivalve larvae

Peripheral sensory neurons govern development of the nervous system in bivalve larvae

Neuronal Development in the Larvae of the Invasive BiofoulerDreissena polymorpha(Mollusca: Bivalvia), with Special Attention to Sensory Elements and Swimming Behavior

Neurogenesis of the scallop Azumapecten farreri: from the first larval sensory neurons to the definitive nervous system of juveniles

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