Structure and Function of the Crustacean Larval Salt Gland

Conte, Frank P.

doi:10.1016/s0074-7696(08)61314-5

Cited by 69 publications

(46 citation statements)

References 76 publications

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“…A future study that closely examines the molting of A. franciscana exposed to different salinities during certain windows of development is warranted. Salt sensitivity of A. franciscana on days 1-6 may be linked to the immaturity of the thoracic swimming appendages and absence of branchiae, which serve as important ion-secreting organs in adults (Croghan, 1958;Conte, 1984). Likewise, the earliest instars of A. franciscana also show greater sensitivity to an acidic environment compared with adults, and this may be linked to developmental changes in ionoregulatory organs (Doyle and McMahon, 1995).…”

Section: Morphometric Characteristicsmentioning

confidence: 99%

“…The number of cysts that hatch is generally unaffected by salinity, but hatching is delayed and there is an increase in an oval phenotype of prenauplii at salinities above 35-44 ppt (Jennings and Whitaker, 1941;Neumeyer et al, 2015). Newly hatched nauplii have a 'neck organ' that is thought to serve as the main osmoregulatory organ (Croghan, 1958;Conte, 1984). Following the first molt, second instars use a renal maxillary gland and their gut to maintain water and ion balance (Conte, 1984).…”

Section: Morphometric Characteristicsmentioning

confidence: 99%

“…Newly hatched nauplii have a 'neck organ' that is thought to serve as the main osmoregulatory organ (Croghan, 1958;Conte, 1984). Following the first molt, second instars use a renal maxillary gland and their gut to maintain water and ion balance (Conte, 1984). Despite these osmoregulatory organs, it is unlikely that early developmental stages have the same ionoregulatory ability as later stages and adults.…”

Section: Morphometric Characteristicsmentioning

confidence: 99%

“…Several studies have indicated that survival, reproductive characteristics, life span, respiration, growth and morphology of Artemia all change following chronic exposure to different salinities (Conte, 1984;Triantaphyllidis et al, 1995;Browne and Wanigasekera, 2000;El-Bermawi et al, 2004;Neumeyer et al, 2015). However, it remains to be tested whether the morphometric phenotype of adult Artemia is altered following exposure to different salinities during specific windows of development.…”

Section: Introductionmentioning

confidence: 99%

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Salt sensitivity of the morphometry of Artemia franciscana during development: A demonstration of 3-D critical windows

Mueller

Willis

Burggren

2015

Journal of Experimental Biology

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A 3D conceptual framework of 'critical windows' was used to examine whether the morphometry of Artemia franciscana is altered by salinity exposure during certain key periods of development. Artemia franciscana were hatched at 20 ppt (designated control salinity) and were then exposed to 10, 30, 40 or 50 ppt either chronically (days 1-15) or only on days 1-6, 7-9, 10-12 or 13-15. On day 15, maturity was assessed and morphometric characteristics, including mass, total body length, tail length and width, length of the third swimming appendage and eye diameter, were measured. Maturation and morphometry on day 15 were influenced by the exposure window and salinity dose. Artemia franciscana were generally larger following exposure to 10 and 40 ppt during days 1-6 and 7-9 when compared with days 10-12 and 13-15, in part due to a higher percentage of mature individuals. Exposure to different salinities on days 1-6 produced the greatest differences in morphometry, and thus this appears to be a period in development when A. franciscana is particularly sensitive to salinity. Viewing the developmental window as three-dimensional allowed more effective visualization of the complex interactions between exposure window, stressor dose and the magnitude of morphometric changes in A. franciscana.

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Section: Morphometric Characteristicsmentioning

confidence: 99%

Section: Morphometric Characteristicsmentioning

confidence: 99%

Section: Morphometric Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Salt sensitivity of the morphometry of Artemia franciscana during development: A demonstration of 3-D critical windows

Mueller

Willis

Burggren

2015

Journal of Experimental Biology

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“…Studies of Na,K-ATPase expression in the developing brine shrimp have been carried out in our laboratory for several years. Gene expression of the enzyme has been examined by biochemical (Fisher et al, 1986;Peterson et al, 1982a; Conte et al, 1977) and histochemical studies (Conte, 1984). Furthermore, the mRNAs of the a-and P-subunits during brine shrimp development have been semiquantitated by North-555 ern analysis (Guo and Hokin, 1989).…”

Section: Introductionmentioning

confidence: 99%

Differential expression of the alpha 2 and beta messenger RNAs of Na,K-ATPase in developing brine shrimp as measured by in situ hybridization.

Sun

Guo²,

Hartmann³

et al. 1992

J Histochem Cytochem.

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We used in situ hybridization histochemistry with synthetic oligonucleotide probes to localize the "As encoding the a2-and P-"As of Na,K-ATPase during development of the brine shrimp Artemh. The "As of the az-and P-subunit were of low abundance in the cysts; in addition, less mRNA of the &subunit was localized. During emergence (12 hr), there was an increase in az-subunit mRNA in the gut mucosa, but there was a burst in P-subunit mRNA throughout. As development progressed, the "As of both the a2-and j3-subunits showed a distinct pattern of expression in which the mRNA in the salt gland was of greatest abundance, followed by epidermal cells and gut mucosa. After 36 hr the az-subunit mRNA began to decrease in all positive cells but still remained highest in the salt gland and

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Spatial distribution of posttranslationally modified tubulins in polarized cells of developing Artemia

MacRae

Langdon

Freeman

1991

Cell Motil. Cytoskeleton

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In many differentiated cells, posttranslationally modified tubulins exhibit restricted subcellular distribution, leading to the proposal that they are required for the production and maintenance of polarity. To study this possibility, we used immunological approaches to examine tubulin isoforms in developing Artemiu larvae and to determine their location in several types of cells within the organism. The amount of tubulin in relation to total protein remained relatively constant during early larval development while detyrosinated tubulin increased, an event correlated with the differentiation of larval gut muscle cells. Except for epidermal cells of the developing thorax, each type of cell within the Artemiu larvae exhibited characteristic staining patterns which were very similar for each antitubulin antibody. Within epidermal cells, microtubules containing acetylated tubulin appeared patchy or punctate in their distribution, an image not seen with the other antibodies. In most polarized cells, staining for tubulin and actin colocalized in discrete areas, demonstrating enrichment of both proteins within the same cellular compartment and suggesting functional interactions. Mitotic figures were stained with qualitatively equal intensity by all of the antitubulin antibodies, but asters were not observed. Midbodies were intensely stained with phalloidin as well as the antibodies to tubulin. It was clear that microtubules exhibited a preferential localization in cells of Arfernia but in no case was a tubulin isoform found exclusively in one area of a cell. The results support the contention that microtubules influence the organization of polarized cell structure and function but they do not permit the conclusion that this capability is dependent on the localization of posttranslationally modified tubulins to restricted subcellular positions.

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Structure and Function of the Crustacean Larval Salt Gland

Cited by 69 publications

References 76 publications

Salt sensitivity of the morphometry of Artemia franciscana during development: A demonstration of 3-D critical windows

Salt sensitivity of the morphometry of Artemia franciscana during development: A demonstration of 3-D critical windows

Differential expression of the alpha 2 and beta messenger RNAs of Na,K-ATPase in developing brine shrimp as measured by in situ hybridization.

Spatial distribution of posttranslationally modified tubulins in polarized cells of developing Artemia

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