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| Registros recuperados: 24 | |
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| Cádiz,Francisco J; Gallardo,Carlos S. |
| Flammulina festiva Scott, 1970 is a terrestrial gastropod endemic to southern Chile. Characteristics of living specimens, including the anatomy of the excretory and reproductive systems of this species are here reported for the first time. The excretory system of this species is of the charopid type with a short, curved primary ureter, and a secondary ureter which extends to the excretory sinus. The reproductive system exhibits characteristics similar to other Charopidae. There is an ovotestis that is divided into seven lobes, a well-developed albumin gland, an ovospermial duct with a proximally diverticulate, distally undivided prostatic gland, plus a short oviduct. The terminal portion of the system shows a pointed epiphallus, and a phallus within a... |
| Tipo: Journal article |
Palavras-chave: Flammulina festiva; Gastropoda; Excretory system; Reproductive system; Charopidae; Chile. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382008000100001 |
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| Gullo,Betina Sandra. |
| A detailed preliminary histological analysis of Helobdella hyalina Ringuelet, 1942 male system from Los Talas, Buenos Aires, Argentina is described. Six pairs of testisacs, located between the crop caeca, form the male reproductive system. Each testisac is clothed by the mesotelium. Inside it, the germinal cells are connected to the citophore and develop functional unit called poliplast. The spermatozoa are released into testisacs after the reabsortion of the citophore. Five stages of spermatogenesis are described taking into account the successive maturation stages of germinal cells and the changes in the citophore size. Lining cells and gland cells were found in the seminal vesicle. Five different types of gland cells are placed inside the ejaculatory... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Histology; Reproductive system; Helobdella. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000100002 |
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| López-Peraza,D. J; Hernández-Rodríguez,M; Barón-Sevilla,B; Bückle-Ramirez,L. F. |
| This study described the reproductive system and gonadal development of Octopus rubescens from Bahía de Todos Santos, Baja California, Mexico. A total of 65 organisms, 35 males weighing 7.2 to 543.4 g and 30 females from 9.4 to 87.7 g where analyzed. The gonad development was defined through histological methods using Hematoxylin-eosin and Arteta- trichrome stains. We describe macroscopically the reproductive system of males and females, and characterized each of the anatomic components. Eight stages of maturity were recognized in females: 1. Immature, 2. Initial folliculogenesis, 3. Final folliculogenesis, 4. Previtelogenesis, 5. Early vitelogenesis, 6. Final vitelogenesis, 7. Maturing and 8. Spawn. In males five stages were identified: 1. Immature, 2.... |
| Tipo: Journal article |
Palavras-chave: Octopus rubescens; Histology; Reproductive system; Gonad maturity. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000400050 |
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| Collado,Gonzalo A; Brown,Donald I. |
| This study describes the microscopic anatomy of the reproductive systems of the keyhole limpets Fissurella latimarginata and Fissurella cumingi to test the existence of a possible isolating reproductive mechanism of morphophysiological type between species, and consequently to determine if the findings provide a valid taxonomic characteristic to distinguish these sympatric species. The results show that in both species the reproductive system is intimately associated with the excretory system. The gonad has a septa organization, and is connected with the distal portion of the right kidney by means of a renopericardial duct which functions as a genital duct. The gametes are evacuated to the mantle cavity through the right kidney opening. Besides transport... |
| Tipo: Journal article |
Palavras-chave: Mollusk; Fissurellidae; Reproductive system; Microscopic anatomy; Taxonomy. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000200012 |
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| Wehitt,Anahí; Di Giacomo,Edgardo E; Galíndez,Elena J. |
| Chondrichthyans are extremely susceptible to overfishing due, among other things, to their reproductive adaptations. Basic knowledge of reproductive parameters is essential, both of ecological and for economic points of view. Zearaja chilensis is a valuable economic resource in South America. This work analyzes the microanatomy of female reproductive system, as well as the size of the onset of vitellogenesis. The material was fixed in Bouin and processed using routine histological techniques. Both ovaries are equally functional. Folliculogenesis depicts the same pattern of other Chondrichthyans. Follicles with different degrees of maturation coexist in mature animals, with the exception of oogonia, which were only found in immature individuals. Likewise,... |
| Tipo: Journal article |
Palavras-chave: Elasmobranchs; Reproductive system; Ovary; Zearaja chilensis. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000100049 |
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| Jordão,Alexandre L; Nakano,Octávio; Janeiro,Vanderly. |
| Reproduction of most insects depend on nutrients accumulated during the larval stage, but many lepidopteran species will also depend on nutrients obtained at the adult stage. Feeding at the adult stage allows the intake of carbohydrate and amino acid rich solutions, which may have an effect on the species reproduction and population growth. The objectives of the current study were to characterize the effects of sugar consumption by adults of the potato tuber moth, Phthorimaea operculella (Zeller), on its reproduction. To initially test the food intake by adults, a 10% honey solution or water (control), both containing a liquid dye were offered to adult insects 24h after emergence, and the presence of the dye was observed by analysis of their digestive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Color dye; Digestive system; Ovarian development; Reproductive system. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000300001 |
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| PIEDADE-KIILL,LÚCIA HELENA; RANGA,NEUSA TARODA. |
| Aspectos da fenologia, biologia da polinização e reprodução de Jacquemontia multiflora foram estudados na Fazenda Catalunha, Santa Maria da Boa Vista-PE. J. multiflora é uma liana anual, que apresenta floração do tipo cornucópia, com pico desta fenofase no bimestre março/abril, que corresponde ao final da estação chuvosa. As flores estão reunidas em cimeiras que apresentam eixo principal desenvolvido, expondo as flores acima da folhagem. As flores são raso-campanuladas, azuis, inodoras e secretam pequenas quantidades de néctar. A antese é diurna, ocorrendo por volta da 5:30h., e a duração das flores é de aproximadamente nove horas, podendo ser consideradas como efêmeras. Abelhas Apidae e Halictidae são os visitantes mais frequentes. Apis mellifera e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floral biology; Reproductive system; Jacquemontia multiflora. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000100004 |
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| Dong,Zimei; Shi,Changying; Chu,Gengbo; Dong,Yanping; Chen,Guangwen; Liu,Dezeng. |
| ABSTRACT Planarians, the representatives of an ancient bilaterian group with complex reproductive system and high regenerative capabilities, are model system suitable for studying the basic molecular requirements for the development of the reproductive system. To further explore the morphological changes of the gonads during desexualization and the molecular events of the genes controlling the reproductive system development in planarians, we have investigated the histological changes of ovary and testis by paraffin section and the expression patterns of reproductive-related genes by the quantitative real-time PCR in Dugesia japonica Ichikawa & Kawakatsu, 1964, upon starvation. The four genes, Djprps, DjvlgA, DjvlgB and Djnos, have been selected. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Planarian; Food deprivation; Germ cells; Reproductive system. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100335 |
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| Vara,Dioneia C. da; Leal-Zanchet,Ana M.. |
| Glands of the reproductive system are important for taxonomical identification of flatworms. We studied the histology and histochemical characteristics of the glands of the male copulatory apparatus in Girardia anderlani (KAWAKATSU & HAUSER, 1983). Specimens were fixed in reproductive state, i. e. during and following copulation at four, eight, 12 and 16 hours intervals. Secretory cells were distinguished on the basis of secretion morphology and their staining properties, using trichrome methods and histochemical reactions. Twelve secretory cell types and five main types of secretions were identified in the male copulatory apparatus: glycoproteic with and without tryptophan; glycosaminoglycidic; neutral mucopolysaccharidic; and proteic. Compared to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dugesiidae; Glands; Flatworms; Reproductive system. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000200015 |
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| Picoral,Mônica; Thomé,José Willibaldo. |
| It is described the anatomy and microanatomy of the phallus complex of Rectartemon depressus (Heynemann, 1868). The complex is composed by a phallus, a diverticle of the phallus and an epiphallus, where the deferens duct is thrown in: the retractor muscle is splitted in two parts, inserted into the region of the epiphallus through a smaller branch, and at the extremity of the diverticle, through a longer and thiner branch. The lumen of the phallus, epiphallus and diverticle have corrugations and thorns. On the phallus the thorns are arranged in a protuberance and disposed alternately in rows, ali with an aculeus form and with a chestnut collor point and a yellow basis. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Streptaxidae; Rectartemon depressus; Phallus complex; Anatomy; Reproductive system. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000100007 |
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| OLIVEIRA,Jônatas Chagas de; RUFINO,Polinar Bandeira; AZÊVEDO,Hellen Sandra Freires da Silva; SOUSA,Adna Cristina Barbosa de; ASSIS,Giselle Mariano Lessa de; SILVA,Lucielio Manoel da; SEBBENN,Alexandre Magno; CAMPOS,Tatiana de. |
| ABSTRACT The search for alternatives to increase productivity and sustainability of livestock production in the Amazon region without increasing deforestation is challenging. Mixed pastures of grasses with forage peanut (Arachis pintoi) have shown positive economic impacts. However, gaps in the knowledge of the reproductive biology of A. pintoi have limited the development of new cultivars adapted to the environmental variations in the Brazilian Amazon. Pasture consortiums of Brachiaria humidicola with forage peanuts (cv. Mandobi) resulted in a 42% increase in weight gain productivity. New cultivars better adapted to the Amazon climate should bring even greater gains. We evaluated the mating system in twenty A. pintoi accessions, and approximately 40... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reproductive system; Arachis pintoi; SSR; Crossing rate. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400277 |
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| Rodrigues,Daniele M.; Turchetto,Caroline; Callegari-Jacques,Sidia M.; Freitas,Loreta B.. |
| ABSTRACT The reproductive system of flowering plants can be highly variable, affecting their biology, gene flow and genetic variability among populations. Petunia secreta is a rare annual endemic species of Pedra do Segredo, located in the municipality of Caçapava do Sul, state of Rio Grande do Sul, Brazil. Although rare, the species possesses a high level of genetic variability. We investigated the reproductive system of P. secreta, including fruit production and seed germinability, in order to determine if its reproductive system can explain its genetic diversity. We sampled five populations and conducted five greenhouse hand-pollination treatments: 1) autonomous apomixis; 2) self-pollination; 3) hand self-pollination; 4) geitonogamy; and 5)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endogamy; Pampas; Petunia; Reproductive success; Reproductive system; Seed germinability. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200180 |
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| Martins,Cristiane; Freitas,Leandro. |
| ABSTRACT Plant-pollinator interactions range from obligatory specialists to facultative generalists, and floral morphology and pollination system may not match completely. The floral biology, reproductive system and floral visitors of a species of the tribe Rhipsalideae were investigated with a focus on the consistency between the pollination system and the floral phenotype. Rhipsalis neves-armondii is an obligate xenogamous species, due to self-sterility. Its flowers are white, small and diurnal, and radially symmetrical. These features, along with their small amount of nectar, characterize the flowers as phenotypic generalists. The most frequent pollinators were a solitary oligolectic species of Andrenidae (Rhophitulus solani), two species of Meliponinae... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cactaceae; Floral biology; Montane rain forest; Oligolectic bees; Pollinators; Reproductive system; Rhipsalis; Self-incompatibility. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300359 |
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| Cumagun, Christian Joseph Rili; McDonald, Bruce Alan; Arakawa, Masao; Castroagudín, Vanina Lilian; Sebbenn, Alexandre Magno; Ceresini, Paulo Cezar. |
| Sheath blight, caused by the fungal pathogen Rhizoctonia solani AG-1 IA is one of the most important rice diseases worldwide. The objetives of this study was to determine the predominant reproductive system and the genetic structure of 18 rice-infecting populations of R. solani sampled from China, Japan and the Philippines, the most important rice production countries in Asia. Knowledge about the population genetic structure of the pathogen in Asia is useful in identifying sources of infection and formulating sustainable management strategies for rice sheath blight. From a total of 717 isolates, 423 unique multilocus genotypes were detected based on nine microsatellite loci. The three country populations of R. solani AG-1 IA exhibited a mixed reproductive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thanatephorus cucumeris; Microsatellite genotyping; Reproductive system; Gene flow; Migration.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42457 |
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| Registros recuperados: 24 | |
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