Roux's archives of developmental biology : the official organ of the EDBO最新文献_第4页

Fate mapping study of the endoderm of the 1.5-day-old chick embryo. 1.5日龄鸡胚内胚层命运定位研究。

Roux's archives of developmental biology : the official organ of the EDBO Pub Date : 1996-02-01 DOI: 10.1007/BF00365800

Susumu Matsushita

引用次数: 0

The multi sex combs gene of Drosophila melanogaster is required for proliferation of the germline. 黑腹果蝇的多性别梳子基因是种系增殖所必需的。

Roux's archives of developmental biology : the official organ of the EDBO Pub Date : 1996-02-01 DOI: 10.1007/BF00365798

France Docquier, Olivier Saget, Françoise Forquignon, Neel B Randsholt, Pedro Santamaria

{"title":"The multi sex combs gene of Drosophila melanogaster is required for proliferation of the germline.","authors":"France Docquier, Olivier Saget, Françoise Forquignon, Neel B Randsholt, Pedro Santamaria","doi":"10.1007/BF00365798","DOIUrl":"https://doi.org/10.1007/BF00365798","url":null,"abstract":"We present a genetic analysis showing that the Drosophila melanogaster gene multi sex combs (mxc; Santamaria and Randsholt 1995) is needed for proliferation of the germline. Fertility is the feature most easily affected by weak hypomorphic mutations of this very pleiotropic locus. Pole cell formation and early steps of gonadogenesis conform to the wild-type in embryos devoid of zygotic mxc + product. mxc mutant gonad phenotypes and homozygous mxc germline clones suggest a role for mxc + in control of germ cell proliferation during the larval stages. mxc + requirement is germ cell autonomous and specific in females, whilst in males mxc + product is also needed in somatic cells of the gonads. Although mxc can be classified among the Polycomb group (Pc-G) of genes, negative trans-regulators of the ANT-C and BX-C gene complexes, germline requirement for mxc appears independent of a need for other Pc-C gene products, and mxc gonad phenotypes are different from those induced by mutations in BX-C genes. We discuss the possible functions of the mxc + product which helps to maintain homeotic genes repressed and prevents premature larval haemocyte differentiation and neoplasic overgrowth, but promotes growth and differentiation of male and female gonads.","PeriodicalId":91963,"journal":{"name":"Roux's archives of developmental biology : the official organ of the EDBO","volume":"205 5-6","pages":"203-214"},"PeriodicalIF":0.0,"publicationDate":"1996-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF00365798","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34822878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Morphogenetic movements during axolotl neural tube formation tracked by digital imaging. 用数字成像技术跟踪蝾螈神经管形成过程中的形态发生运动。

Roux's archives of developmental biology : the official organ of the EDBO Pub Date : 1996-02-01 DOI: 10.1007/BF00365809

G Wayne Brodland, Michael J Scott, Andrew F MacLean, M Globus, S Vethamany-Globus, R Gordon, Jim H Veldhuis, R Del Maestro

引用次数: 0

Genetic interactions of pokkuri with seven in absentia, tramtrack and downstream components of the sevenless pathway in R7 photoreceptor induction in Drosophila melanogaster. 黑腹果蝇R7光感受器诱导中7缺失途径及其下游组分的遗传互作

Roux's archives of developmental biology : the official organ of the EDBO Pub Date : 1996-02-01 DOI: 10.1007/BF00365799

Daisuke Yamamoto, Itsuko Nihonmatsu, Takashi Matsuo, Hiroshi Miyamoto, Shunzo Kondo, Kanako Hirata, Yuko Ikegami

{"title":"Genetic interactions of pokkuri with seven in absentia, tramtrack and downstream components of the sevenless pathway in R7 photoreceptor induction in Drosophila melanogaster.","authors":"Daisuke Yamamoto, Itsuko Nihonmatsu, Takashi Matsuo, Hiroshi Miyamoto, Shunzo Kondo, Kanako Hirata, Yuko Ikegami","doi":"10.1007/BF00365799","DOIUrl":"https://doi.org/10.1007/BF00365799","url":null,"abstract":"The sevenless (sev) cascade plays an inductive role in formation of the R7 photoreceptor, whilst the pokkuri (pok) and tramtrack (ttk) gene products are known to repress R7 induction in developing ommatidia of Drosophila melanogaster. To elucidate how these positive and negative signalling mechanisms co-operate in the normal fate determination of R7, genetic interactions of mutations in the pok locus with ttk and downstream elements of sev including Gap1, raf1, rolled (r1) and seven in absentia (sina) were examined. The eye phenotype of a weak hypomorph, pok 15, was enhanced dominantly by Gap1-mip, a recessive mutation in a gene encoding a down-regulator of Ras1, producing multiple R7 in ommatidia. Ras1 has been reported to activate r1-encoded mitrogen-activated protein (MAP) kinase via Raf1 that is associated physically with Rasl. Ommatidia of raf1 c110 and rl 2/rlEMS64 typically lacked R7 and a few outer photoreceptors. The pok 1 mutation suppressed dominantly the rafl c110 rl2/rlEMS64 eye phenotypes, allowing single R7 cells to develop in ommatidia. The rafl c110 mutation improved adult viability of pok 1 homozygotes. An in vitro experiment demonstrated that MAP kinase phosphorylates Pok protein. Ttk is a transcriptional repressor which binds to the regulatory sequence upstream of the fushi-tarazu (ftz), even skipped (eve) and engrailed (en) coding region. A reduced activity in ttk resulted in enhancement of the pok phenotype. ttk mutations produced extra R7 cells even in sina homozygotes whilst the pok mutation did not. This result indicates that Ttk represses R7 induction downstream of the sites where Pok and Sina function.","PeriodicalId":91963,"journal":{"name":"Roux's archives of developmental biology : the official organ of the EDBO","volume":"205 5-6","pages":"215-224"},"PeriodicalIF":0.0,"publicationDate":"1996-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF00365799","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34822879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Establishment and movement of egg regions revealed by the size class of yolk platelets in Xenopus laevis. 卵黄血小板大小分类揭示非洲爪蟾卵区建立和运动。

Roux's archives of developmental biology : the official organ of the EDBO Pub Date : 1995-11-01 DOI: 10.1007/BF00357759

Hiroshi Imoh

引用次数: 0

Multiple, alternative cleavage patterns precede uniform larval morphology during normal development of Dreissena polymorpha (Mollusca, Lamellibranchia). 在多形软体动物（软体动物，板鳃目）的正常发育过程中，多种不同的卵裂模式先于统一的幼虫形态。

Roux's archives of developmental biology : the official organ of the EDBO Pub Date : 1995-11-01 DOI: 10.1007/BF00357760

C M Luetjens, A W C Dorresteijn

{"title":"Multiple, alternative cleavage patterns precede uniform larval morphology during normal development of Dreissena polymorpha (Mollusca, Lamellibranchia).","authors":"C M Luetjens, A W C Dorresteijn","doi":"10.1007/BF00357760","DOIUrl":"10.1007/BF00357760","url":null,"abstract":"In this study we reinvestigate the early development of the freshwater mussel Dreissena polymorpha, previously studied by Meisenheimer (1901). The data include video time-lapse recordings of living embryos and bisbenzimide stains of fixed embryos as well as morphometry on fixed, serially-sectioned embryos. We present the cell lineage and cell cycle durations up to the first indication of symmetrization within this embryo. We show that early cell cycles last approximately 1h. A dramatic extension of cell cycle duration and a concomitant asynchrony among the various cell lines was observed starting at the fifth cleavage. Short cell cycles, like those of early blastomeres, were a constant property of the largest descendants of the 2d-cell line only. In contrast to Meisenheimer's observations and our experiences with other spiralian embryos, the cleavage pattern proved to follow multiple alternatives. The embryonic quadrants A-D were arranged in either a clockwise or counter-clockwise fashion and the chirality of the third cleavage was either dextral or sinistral irrespective of the arrangement of the quadrants. As a consequence, four different blastomere configurations were encountered and the dorsoventral axis could take four different angles with respect to the plane of first cleavage. The dorsal side was most easily recognized by the position of the 2d-micromere at the 16-cell stage. The fact that all of such embryos could develop into normal, uniform larvae is interpreted as the result of cell-cell interactions in morphogenetic regulation.","PeriodicalId":91963,"journal":{"name":"Roux's archives of developmental biology : the official organ of the EDBO","volume":"205 3-4","pages":"138-149"},"PeriodicalIF":0.0,"publicationDate":"1995-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34822516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Retinoic acid in the anteroposterior patterning of the zebrafish trunk. 斑马鱼躯干前后图案中的视黄酸。

Roux's archives of developmental biology : the official organ of the EDBO Pub Date : 1995-11-01 DOI: 10.1007/BF00357756

Nicholas Marsh-Armstrong, Peter McCaffery, George Hyatt, Laura Alonso, John E Dowling, Walter Gilbert, Ursula C Dräger

引用次数: 0

Effect of mono- and divalent cations on polyp morphogenesis in isolated tentacles of Aurelia aurita(Scyphozoa). 单价和二价阳离子对水螅离体触须息肉形成的影响。

Roux's archives of developmental biology : the official organ of the EDBO Pub Date : 1995-11-01 DOI: 10.1007/BF00357758

Andrea Hujer, Georgia Elizabeth Lesh-Laurie

{"title":"Effect of mono- and divalent cations on polyp morphogenesis in isolated tentacles of Aurelia aurita(Scyphozoa).","authors":"Andrea Hujer, Georgia Elizabeth Lesh-Laurie","doi":"10.1007/BF00357758","DOIUrl":"https://doi.org/10.1007/BF00357758","url":null,"abstract":"Tentacles excised from syphistoma polyps of Aurelia aurita undergo rapid regeneration to form whole polyps following exposure to an excess or absence of specific ions. It has been shown that a 12-18 h exposure of isolated tentacles to 58 mM excess of Cs+ results in a rapid firing of nematocysts, followed by an accelerated, synchronous polyp morphogenesis. Absence of Mgt2+ from the culture solution for 4-24 h also led to an accelerated, synchronous polyp regeneration. In either experimental set-up, incubation in 5-10 mM hydroxyurea effectively halted regeneration. Exposure to an excess of Li+ (50-200 mm) or K+ (10-50 mM) caused no firing of nematocysts and a percentage of polyp regeneration only slightly higher than control tentacles. Use of the K+ channel blocker tetraethylammonium (TEA; 100-300 mM) lead to similar levels of regeneration. A Ca2+ or K+-reduced artificial culture solution did not enhance regeneration. Ouabain (1 mM) dampened the Cs+ induced acceleration of polyp morphogenesis, and when given without Cs+, elicited a control level response.","PeriodicalId":91963,"journal":{"name":"Roux's archives of developmental biology : the official organ of the EDBO","volume":"205 3-4","pages":"122-127"},"PeriodicalIF":0.0,"publicationDate":"1995-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF00357758","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34823083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Reorganisation of microtubule arrays in the telotrophic ovaries of hemipteran insects: Correlation with meiotic reinitiation. 半足类昆虫远营养卵巢中微管阵列的重组:与减数分裂再起始的关系。

Roux's archives of developmental biology : the official organ of the EDBO Pub Date : 1995-11-01 DOI: 10.1007/BF00357761

Jonathan D Lane, Howard Stebbings

引用次数: 1

The development of cnidarian stinging cells: maturation and migration of stenoteles of Hydra vulgaris. 刺胞细胞的发育:水螅小管的成熟和迁移。

Roux's archives of developmental biology : the official organ of the EDBO Pub Date : 1995-11-01 DOI: 10.1007/BF00357763

Jakob Weber

{"title":"The development of cnidarian stinging cells: maturation and migration of stenoteles of Hydra vulgaris.","authors":"Jakob Weber","doi":"10.1007/BF00357763","DOIUrl":"https://doi.org/10.1007/BF00357763","url":null,"abstract":"The late stages of stenotele development and the migration and installation of freshly matured stenoteles in Hydra have been studied by kinetic and immunofluorescence investigations with rhodamine-labelled polyps. It was found that the high concentration of osmotic pressure-generating poly(γ-glutamic acid)s is synthesised exclusively within the lumen of the immature nematocyst. Assembly of the polymers, which is completed after approximately 0.5 days, is accompanied by a swelling of the capsule and ends when the cyst is mature. Active migration of the stenoteles to the tentacles begins only about 1.0 day later, and the time required for installation of a stenotele on the outer surface of the tissue amounts to about another 1.5 days. Furthermore, the results obtained suggest that the disintegration of the clusters of growing stenoteles, which begins 0.5 to 1.0 days before maturation, is a passive process; the ability of a nematocyte to migrate actively to the tentacles is acquired after maturation and might be controlled directly by regulating factors contained in the tissue.","PeriodicalId":91963,"journal":{"name":"Roux's archives of developmental biology : the official organ of the EDBO","volume":"205 3-4","pages":"171-181"},"PeriodicalIF":0.0,"publicationDate":"1995-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/BF00357763","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"34822519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4