Two ligands signal through the Drosophila PDGF/VEGF receptor to ensure proper salivary gland positioning
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Border cells
Border cells
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Border cells
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Three new species of the Drosophila tripunctata group are described and illustrated. These new species were captured using plastic bottles containing pieces of fermented banana with yeast. The collections were from Napo Province, Ecuador at 2 200 m and 3 362 m above sea level. The new species are: Drosophila napoensis sp. nov., Drosophila cuyuja sp. nov. and Drosophila quijos sp. nov. The first two species belong to subgroup I and the latter species belong to subgroup III of the Drosophila tripunctata group.
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Root border cells are a population of rhizosphere cells surrounding but separated from the root apex and have been considered to play a role in the protection of the root tip from extracellular biotic and abiotic stresses. In this paper, the production and development of border cells in Glycine max (L.) Merr. were investigated. It was showed that the first border cell formation almost synchronized with root tip emergence in soybean cultivar “8157 Maodou”. The number of border cells increased with the development and elongation of the root. When the root length was about 15 mm grown at 25℃, the number of border cells reached the maximum, that was about 5 300. Temperature may directly or indirectly infect root growth, as well as regulate the production and development of border cells. The root length of soybean at the lower temperature 15℃ is significantly shorter than that at the higher temperature 25℃ or 35℃. And the number of border cells released at 15℃ is also significantly less than that at 25℃ or 35℃. It was suggested that the lower temperature could be more harmful to the development of the root of soybean. Significant difference in activity of detached border cells was observed under different culture conditions. The survival percentage of detached border cells was significantly higher in the cultural condition of mannitol or MS medium than that cultured in ddH 2O. The pectin methylesterase (PME) may play an important role in production and development of border cell in Glycine max (L.) Merr.
Border cells
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Elongation
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Eight new species of the genus Drosophila are described and illustrated: Drosophila kingmani sp. nov., Drosophila malacatus sp. nov., Drosophila millmasapa sp. nov., Drosophila pichka sp. nov., Drosophila rusaryu sp. nov., Drosophila shunku sp. nov., Drosophila shunkuku sp. nov. and Drosophila taki sp. nov. These species were collected in the cloud forests of Podocarpus National Park in the southern Ecuadorian Andes. The flies were captured using plastic bottles containing pieces of fermented banana with yeast.
Drosophila Suzukii
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Using the described experimental conditions whole anti-chick embryo hamster serum placed in proximity to the pre-incubated chick embryo stops the development of these embryos at a time which corresponds to the time the embryo antigen was obtained. Even though the experimental factors are complex the experimental series differed sharply from the controls. The anti-embryo serum also produced anomalies and a high mortality in the treated series. These experiments show clearly that chick embryos contain distinctive antigenic materials which are related to the embryo's age. The instep order of the results in the recipient embryos points strongly to the development of qualitatively different protein complexes in the embryo concurrent with the embryo's growth
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The picture wing species group of Hawaiian Drosophila is the only one to be relatively well known taxonomically, butspecies continue to be discovered. Here seven new species are described: Drosophila kikiko new species, Drosophila ki-noole new species, Drosophila moli new species, Drosophila nukea new species, Drosophila opuhe new species, Dros-ophila pihulu new species, and Drosophila pilipa new species. In addition, the male of Drosophila oreas Hardy isdescribed for the first time, and Drosophila virgulata Hardy & Kaneshiro is reduced to a new junior synonym of Dros-ophila lanaiensis Grimshaw, and the status of the latter and Drosophila ciliaticrus Hardy is clarified. A complete key to all the picture wing species is provided.
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Abstract Flow cytometry estimates of genome sizes among species of Drosophila show a 3-fold variation, ranging from ∼127 Mb in Drosophila mercatorum to ∼400 Mb in Drosophila cyrtoloma. However, the assembled portion of the Muller F element (orthologous to the fourth chromosome in Drosophila melanogaster) shows a nearly 14-fold variation in size, ranging from ∼1.3 Mb to >18 Mb. Here, we present chromosome-level long-read genome assemblies for 4 Drosophila species with expanded F elements ranging in size from 2.3 to 20.5 Mb. Each Muller element is present as a single scaffold in each assembly. These assemblies will enable new insights into the evolutionary causes and consequences of chromosome size expansion.
Genome size
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Fur alle vor 1956 beschriebenen palearktischen Drosophilidae-Arten ist das Typenmaterial, sein Aufbewahrungsort und seine Bezettelung aufgelistet. Lectotypen sind festgelegt, soweit das zweckmasig ist. Nomenklatorische Handlungenformosus (Loew, 1864) (Acletoxenus), Lectotype described as Gitona formosusindagator Loew, 1858 (Cacoxenus), Lectotypeperspicax (Knab, 1914) (Cacoxenus), Lectotype described as Gitonides perspicaxdistincta (Egger, 1862) (Chymomyza), Lectotype described as Drosophilaobscura (de Meijere, 1911) (Chymomyza), Lectotype described as Amphoroneura obscuraoldenbergi Duda, 1934 (Chymomyza), Lectotypepictipes (de Meijere, 1911) (Dettopsomyia), Lectotype described as Drosophila pictipesadspersa Mik, 1886 (Drosophila), Lectotypealboralis Momma & Takada, 1954 (Drosophila), Lectotypeapproximata Zetterstedt, 1847 (Drosophila), Lectotypebusckii Coquillett, 1901 (Drosophila), Lectotypecameraria Haliday, 1833 (Drosophila), Lectotypecinerella Fallen, 1823 (Drosophila), Lectotypefasciata Meigen, 1820 (Drosophila), Lectotypefenestrarum Fallen, 1823 (Drosophila), Lectotypegrischuna Burla, 1951 (Drosophila), Lectotypekuntzei Duda, 1924 (Drosophila), Lectotypelaeta Zetterstedt, 1847 (Drosophila), Lectotypelatestriata Becker, 1908 (Drosophila), Lectotypelimbata van Roser, 1840 (Drosophila), Lectotypeobscura Fallen, 1823 (Drosophila), Lectotypeoldenbergi Duda, 1924 (Drosophila), Lectotypephalerata Meigen, 1830 (Drosophila), Lectotypepilosula Becker, 1908 (Drosophila), Lectotypeprorepleta Duda, 1925 (Drosophila), Lectotyperubrostriata Becker, 1908 (Drosophila), Lectotyperuficeps von Roser, 1840 (Drosophila), Lectotyperufifrons Loew, 1873 (Drosophila), Lectotypeschmidti Duda, 1924 (Drosophila), Lectotypetestacea von Roser, 1840 (Drosophila), Lectotypetransversa Fallen, 1823 (Drosophila), Lectotypetsigana Burla & Gloor, 1952 (Drosophila), Lectotypeuvarum Rondani, 1875 (Drosophila), Lectotypeversicolor Mather, 1955 (Drosophila), Lectotypevirginea Meigen, 1830 (Drosophila), Lectotypebeckeri (Duda, 1924) (Gitona), Lectotype described as drosophila beckeriinterrupta Duda, 1924 (Leucophenga), Lectotypequadripunctata (de Meijere, 1908) (Leucophenga), Lectotype described as Drosophila quadripunctatasubpollinosa (de Meijere, 1914) (Leucophenga), Lectotype described as Drosophila subpollinosanitida Duda, 1922 (Liodrosophila), Lectotypecongesta (Zetterstedt, 1847) (Microdrosophila), Lectotype described as Drosophila congestanigriventris (Zetterstedt, 1847) (Microdrosophila), Lectotype described as Drosophila nigriventrisgratiosa (de Meijere, 1911) (Mycodrosophila), Lectotype described as Drosophila gratiosaamoena (Meigen, 1838) (Scaptomyza), Lectotype described as Hydrellia amoenadisticha (Duda, 1921) (Scaptomyza), Lectotype described as Drosophila distichaflavipennis (Zetterstedt, 1838) (Scaptomyza), Lectotype described as Drosophila flavipennisgraminum (Fallen, 1823) (Scaptomyza), Lectotype described as Drosophila graminumimpunctata (Frey, 1945) (Scaptomyza), Lectotype described as Scaptomyzella impunctataincana (Meigen, 1830) (Scaptomyza), Lectotype described as Drosophila incanapallida (Zetterstedt, 1847) (Scaptomyza), Lectotype described as Drosophila pallidarufipes (Meigen, 1830) (Scaptomyza), Lectotype described as Drosophila rufipessordida (Zetterstedt, 1838) (Scaptomyza), Lectotype described as Drosophila sordidacurvipennis (Fallen, 1823) (Stegana), Lectotype described as Drosophila curvipennisfurta (Linnaeus, 1766) (Stegana), Lectotype described as Musca furtanigrifrons (de Meijere, 1911) (Stegana), Lectotype
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