Das Muskelsystem von Daphnia

Binder, Gertrude

doi:10.1002/iroh.19310260104

Cited by 32 publications

(16 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our study, however, the latter neuropils have not been considered in any detail since they rarely were associated with distinct PDH-immunoreactive (PDH-ir) structures. For muscles, we adopted the terminology of Binder [53].…”

Section: Terminologymentioning

confidence: 99%

Pigment-dispersing hormone in Daphnia interneurons, one type homologous to insect clock neurons displaying circadian rhythmicity

Strauß

Zhang

Verleyen

et al. 2011

Cell. Mol. Life Sci.

View full text Add to dashboard Cite

We report identification of a beta-type pigment-dispersing hormone (PDH) identical in two water flea species, Daphnia magna and Daphnia pulex. It has been identified by cloning of precursors, chromatographic isolation from tissue extracts followed by immunoassays and de novo-mass spectrometric sequencing. The peptide is restricted to a complex system of distinct interneurons in the brain and visual ganglia, but does not occur in neurosecretory cells projecting to neurohemal organs as in decapod crustaceans. Thirteen neuron types individually identified and reconstructed by immunohistochemistry were almost identical in terms of positions and projection patterns in both species. Several neurons invade and form plexuses in visual ganglia and major brain neuropils including the central body. Five neuron types show contralateral pathways and form plexuses in the lateral, dorsal, or postlateral brain neuropils. Others are local interneurons, and a tritocerebral neuron connects the protocerebrum with the neuropil of the locomotory second antenna. Two visual ganglia neuron types lateral to the medulla closely resemble insect medulla lateral circadian clock neurons containing pigment-dispersing factor based upon positional and projectional criteria. Experiments under 12:12 h light/dark cycles and constant light or darkness conditions showed significant circadian changes in numbers and activities of one type of medulla lateral PDH neuron with an acrophase in the evening. This simple PDH system shows striking homologies to PDH systems in decapod crustaceans and well-known clock neurons in several insects, which suggests evolutionary conservation of an ancient peptidergic interneuronal system that is part of biological clocks.

show abstract

Section: Terminologymentioning

confidence: 99%

Pigment-dispersing hormone in Daphnia interneurons, one type homologous to insect clock neurons displaying circadian rhythmicity

Strauß

Zhang

Verleyen

et al. 2011

Cell. Mol. Life Sci.

View full text Add to dashboard Cite

show abstract

“…The antennal musculature in S. crystallina terminates at the border between the two distalmost segments, likely allowing some limited maneuvering of the distalmost segment. Binder (1932) depicted antennal musculature of S. crystallina to extend into the distal segments of the antennal rami, which could not be confirmed here.…”

Section: Discussionmentioning

confidence: 67%

“…No corresponding musculature could be found in any of the legs of the analyzed specimen of S. crystallina (Figures 7 and 8). This is in contrast to Binder (1932) and Preuss, 1957, who reported a few muscle bundles in this limb part of S. crystallina . The lack of homologous median limb musculature in S. crystallina makes a homologization of limb parts based on detailed muscular patterns difficult.…”

Section: Discussionmentioning

confidence: 87%

“…The apparent lack of musculature distally in this median flap clearly allows only for passive movements (in contrast to what was found in C. hislopi ). The significantly enlarged filtratory medial plates of trunk limbs 3 and 4 seen in Daphnia sp., which apparently are devoid of musculature (Binder, 1932; Claus, 1876b), have probably been derived in a way similar to that suggested for S. crystallina .…”

Section: Discussionmentioning

confidence: 99%

“…Not many studies have previously dealt with the architecture of branchiopod musculature and several are of older date (Binder, 1932; Claus, 1876b; Fryer & Boxshall, 2009; Preuss, 1957; Sars, 1895, 1896; Williams & Müller, 1996). Some recent studies employed confocal laser scanning microscopy (CLSM) and F‐actin staining of musculature on branchiopod trunk limbs (Kaji, Fritsch, Schwentner, Olesen, & Richter, 2014) and antennae (Maruzzo, Minelli, & Fusco, 2009).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transitions in functional morphology from “large branchiopods” to Cladocera: Video and confocal microscopic studies of Cyclestheria hislopi (Cyclestherida) and Sida crystallina (Cladocera: Ctenopoda)

Sigvardt

Worsaae

Savatenalinton

et al. 2020

Journal of Morphology

View full text Add to dashboard Cite

Great diversity is found in morphology and functionality of arthropod appendages, both along the body axis of individual animals and between different life-cycle stages. Despite many branchiopod crustaceans being well known for displaying a relatively simple arrangement of many serially post-maxillary appendages (trunk limbs), this taxon also shows an often unappreciated large variation in appendage morphology. Diplostracan branchiopods exhibit generally a division of labor into locomotory antennae and feeding/filtratory post-maxillary appendages (trunk limbs). We here study the functionality and morphology of the swimming antennae and feeding appendages in clam shrimps and cladocerans and analyze the findings in an evolutionary context (e.g., possible progenetic origin of Cladocera). We focus on Cyclestheria hislopi (Cyclestherida), sister species to Cladocera and exhibiting many "large" branchiopod characters (e.g., many serially similar appendages), and Sida crystallina (Cladocera, Ctenopoda), which likely exhibits plesiomorphic cladoceran traits (e.g., six pairs of serially similar appendages). We combine (semi-)high-speed recordings of behavior with confocal laser scanning microscopy analyses of musculature to infer functionality and homologies of locomotory and filtratory appendages in the two groups. Our morphological study shows that the musculature in all trunk limbs (irrespective of limb size) of both C. hislopi and S. crystallina comprises overall similar muscle groups in largely corresponding arrangements. Some differences between C. hislopi and S. crystallina, such as fewer trunk limbs and antennal segments in the latter, may reflect a progenetic origin of Cladocera. Other differences seem related to the appearance of a specialized type of swimming and feeding in Cladocera, where the anterior locomotory system (antennae) and the posterior feeding system (trunk limbs) have become fully separated functionally from each other. This separation is likely one explanation for the omnipresence of cladocerans, which have conquered both freshwater and marine free water masses and a number of other habitats.

show abstract

The fine structure of daphnid supraesophageal and optic ganglia, and its possible functional significance

Bohm

Parker

1968

Journal of Morphology

View full text Add to dashboard Cite

Neurosecretory activity and fine structure of the supraesophageal and optic ganglia of Dapknia sch0dleri Sars were studied. The relative amount of paraldehyde fuchsin stainable material present was determined at "daylight" and at one and three hours following for animals maintained under photoperiods of 7.5, 10.5, 13.5, and 16.5 hours. More material was found after one hour in both ganglia and there was a tendency for more in the optic ganglion under 7.5-and 10.5-hour photoperiods.Sections made at two levels in the supraesophageal ganglion and one level in the optic ganglion were examined with a n electron microscope. Posterior and anterior parts of the supraesophageal ganglion contain apparent nerve processes at the edge of the ganglion, parallel to the anterior-posterior axis; these have large granules. Neurons in both areas contain patches of presumed polysaccharide granules. In the posterior region are a dorsolateral and a ventrolateral glandular cell, presumably these occur on both sides of the brain. They have very well-developed endoplasmic reticulum and some large granules. The dorsal cell is usually at the tip of a glial attenuation.Concentric lamellar systems are located i n dilated nerve processes of the first optic ganglion neuropile. Large whorls (about 3.5 p ) are composed of concentric lamellae. When lamellae do not form complete rings, they end in loops or i n dilated tubules that are sometimes constricted as vesicles. Small whorls (1.5 p ) typically have lamellae joined into two or three thick layers. Mitochondria are frequently associated with the whorls. It is proposed that the whorls are active in synthesis, possibly neurohumor production.

show abstract

Das Muskelsystem von Daphnia

Cited by 32 publications

References 0 publications

Pigment-dispersing hormone in Daphnia interneurons, one type homologous to insect clock neurons displaying circadian rhythmicity

Pigment-dispersing hormone in Daphnia interneurons, one type homologous to insect clock neurons displaying circadian rhythmicity

Transitions in functional morphology from “large branchiopods” to Cladocera: Video and confocal microscopic studies of Cyclestheria hislopi (Cyclestherida) and Sida crystallina (Cladocera: Ctenopoda)

The fine structure of daphnid supraesophageal and optic ganglia, and its possible functional significance

Contact Info

Product

Resources

About