Degradation of vitellin during embryonic and larval development in the Pacific oyster<i>Crassotrea gigas</i>

Li, Qi; Osada, Makoto; Suzuki, Tohru; Sato, Minoru; Mori, Keiichiro

doi:10.1080/07924259.1998.9652337

Cited by 18 publications

(11 citation statements)

References 17 publications

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“…At the same time Vtg might be directly encoded by one gene and cleaved at the several positions containing leader sequence to form Vn protein. An occurrence of vitellogenesis inside the ovary of scallop and oyster has been immunologically suggested in the previous reports (Osada et al, 1992(Osada et al, , 2003Suzuki et al, 1992;Li et al, 1998a). In the present study, the Vtg signal was detected only in the ovary not in the testis and digestive gland of both sexes (Fig.…”

Section: Discussionsupporting

confidence: 81%

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Molecular cloning and expression analysis of vitellogenin in scallop, Patinopecten yessoensis (bivalvia, mollusca)

Osada

Harata

Kishida

et al. 2004

Molecular Reproduction Devel

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The present study was undertaken to determine scallop vitellogenin (Vtg) cDNA sequence, to identify Vtg synthesizing cell, and to analyze the regulation of Vtg mRNA expression. Clones containing partial cDNA sequence of Vtg were isolated from cDNA library of the scallop ovary by immunoscreening with the anti-scallop vitellin (Vn) serum. The deduced amino acid sequence of the clone containing the longest cDNA insert (1,689 bp) was identified as a member of the lipid transport protein family and exhibited about 20-35% identity with Vtgs of other oviparous animals. Northern blot analysis identified a single transcript longer than 10 kb in the ovary. Dot blot analysis of the ovary showed a high amount of Vtg mRNA during the growing stage and the level was retained until spawning stage. In situ hybridization demonstrated the expression of Vtg mRNA in the auxiliary cells closely associated with growing oocytes, suggesting that the synthesis of a major yolk protein in the scallop occurs through hetero-synthetic pathway without mediation through the blood flow but occurs de novo in the ovary. The content of Vtg mRNA in the ovarian tissue cultured in vitro with vitellogenesis promoting factor (VPF), which strongly promotes Vtg protein synthesis, from the cerebral plus pedal ganglion (CPG) showed no change. The transcription of Vtg mRNA appeared to be promoted by estradiol-17beta (E2) not by VPF although VPF may enhance the translation of Vtg mRNA.

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Section: Discussionsupporting

confidence: 81%

“…Vn of bivalve mollusc is also thought to be accumulated in the oocyte for embryonic and larval development (Li et al, 1998a). Vns with a molecular mass of >500 and 450 kD have been isolated from the Pacific oyster, C. gigas (Suzuki et al, 1992) and the Japanese scallop, P. yessoensis (Osada et al, 1992), respectively, and characterized.…”

Section: Introductionmentioning

confidence: 99%

Molecular cloning and expression analysis of vitellogenin in scallop, Patinopecten yessoensis (bivalvia, mollusca)

Osada

Harata

Kishida

et al. 2004

Molecular Reproduction Devel

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“…Vitellin itself is a yolk reserve, and hence crucial for successful embryonic development. Vitellin is degraded by a protease during larval development and the resulting free amino acids (generated by hydrolysis of vitellin protein), are thought to be important in the embryonic and larval development (Li et al 1998). Finally, molecular variation in Pgi is known to be related to a number of life-history traits in the Glanville fritillary (reviewed in Bonte & Saastamoinen 2012;Hanski 2012).…”

Section: Genotype-phenotype Associationsmentioning

confidence: 99%

Plastic larval development in a butterfly has complex environmental and genetic causes and consequences for population dynamics

Saastamoinen

Ikonen

Wong

et al. 2013

Journal of Animal Ecology

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Summary1. In insects, the length of larval development time typically influences adult body size and individual fitness, and hence development time can be expected to respond in an adaptive manner to variation in environmental conditions. In the wild, larval growth may be influenced by individual condition, which can be affected by population-level parameters such as population density and abundance and quality of resources. 2. We sampled larvae of the Glanville fritillary butterfly (Melitaea cinxia) from 514 local populations across a large metapopulation before the winter diapause and reared the larvae in common garden conditions after diapause. Here, we report that small post-diapause larvae prolonged their development via an extra larval instar, apparently to compensate for their 'bad start' after diapause. The number of instars was additionally a plastic response to environmental conditions, as the frequency of the extra instar increased under cooler thermal conditions. 3. The benefit of the extra instar is clear, as it allows individuals to develop into larger adults, but the cost is delayed adult eclosion, which is likely to select against the extra instar especially in males, in which early eclosion is critical for mating success. In support of this, the frequency of the extra instar was significantly lower in males (7%) than in females (42%). 4. Polymorphisms in three genes, serpin-1, vitellin-degrading protease precursor and phosphoglucose isomerase, which are known to influence development in insects, were associated with the occurrence of the extra instar. 5. At the level of local populations, the frequency of the extra instar was higher in newly established populations than that in old local ones, possibly reflecting maternal effects, as new populations are often established by females with heavy investment in dispersal. The frequency of the extra instar in turn correlated with the change in population size over 1 year and the risk of local extinction in the natural metapopulation of the Glanville fritillary. 6. Our results highlight the importance of the physiological condition of individuals in shaping subsequent life-history events and even population dynamics.

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“…A common feature of vitellogen in many animal systems is its high molecular weight and abundance in eggs (Wahli, 1988;Li et al, 1998). As yet, the vitellogen in asteroid eggs has not been characterized.…”

Section: Discussionmentioning

confidence: 98%

Oogenic strategies in the evolution of development inPatiriella(Echinodermata: Asteroidea)

Byrne¹,

Cerra²,

Villinski³

1999

Invertebrate Reproduction & Development

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The sea star genus Patiriella has the greatest diversity of life histories known for the Asteroidea. P. regularis has small eggs (150 pm diameter) and the ancestral planktotrophic larvae. P. calcar, P. gunnii, P. exigua and P. pseudoexigua have large eggs (390-440 pm diameter) and non-feeding lecithotrophic larvae. Two species with lecithotrophic larvae P. vivipara and P. parvivipara have secondarily evolved a small egg (135-150 pm diameter). We examined the oogenic strategies involved with evolution of egg size in these sea stars. Comparison of protein profiles, histochemistry and ultrastructure of the eggs of Patiriella indicated that the major changes underlying acquisition of a large egg involved enhanced deposition of lipid in some species and an increase in yolk reserves in others. The eggs of the planktotroph, P. regularis, and the benthic lecithotroph, P. exigua, contained an abundance of major yolk protein MYP. By contrast, the eggs of the planktonic lecithotrophs P. gunnii and P. calcar were dominated by lipid and the MYP appeared to be greatly reduced. The eggs of P. calcar contained an abundant protein which may be a truncated form of vitellogen. The small eggs of the viviparous species P. vivipara and P. parvivipara appear to be miniature versions of the eggs of the closely related P. exigua. Comparison of the eggs of Patiriella species with lecithotrophic development revealed among species variation in oogenesis. Depending on the species, the evolutionary modification of oogenesis appeared to be influenced by phylogenetic history and selection for egg characteristics with respect to the planktonic or benthic location of development.

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Degradation of vitellin during embryonic and larval development in the Pacific oysterCrassotrea gigas

Cited by 18 publications

References 17 publications

Molecular cloning and expression analysis of vitellogenin in scallop, Patinopecten yessoensis (bivalvia, mollusca)

Molecular cloning and expression analysis of vitellogenin in scallop, Patinopecten yessoensis (bivalvia, mollusca)

Plastic larval development in a butterfly has complex environmental and genetic causes and consequences for population dynamics

Oogenic strategies in the evolution of development inPatiriella(Echinodermata: Asteroidea)

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