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Aphidiine and aphelinid parasitoids collected from the soybean aphid, Aphis glycines, on Glycine max in Japan and Indonesia (Java and Bali) were identified to clarify the parasitoid spectrum of the aphid there. Nine parasitoid species from Japan (Aphidiinae: Aphidius gifuensis, Aphidius sp., Binodoxys communis, Diaeretiella rapae, Lipolexis gracilis, Lysiphlebia japonica; Aphelinidae: Aphelinus asychis, A. gossypii, A. varipes) and two parasitoid species from Indonesia (B. communis, A. gossypii) were found to be associated with A. glycines. 相似文献
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A new anhydrobiotic midge from Malawi,Polypedilum pembai sp.n. (Diptera: Chironomidae), closely related to the desiccation tolerant midge,Polypedilum vanderplanki Hinton 下载免费PDF全文
RICHARD CORNETTE NAO YAMAMOTO MASARU YAMAMOTO TADASHI KOBAYASHI NINEL A. PETROVA OLEG GUSEV SACHIKO SHIMURA TAKAHIRO KIKAWADA DYLO PEMBA TAKASHI OKUDA 《Systematic Entomology》2017,42(4):814-825
The sleeping chironomid (Polypedilum vanderplanki Hinton) lives on temporary rock pools in the semi‐arid tropical regions of Africa. Its larvae are able to survive the dry season in a completely desiccated ametabolic state known as anhydrobiosis. So far, P. vanderplanki was the only species among all insects showing demonstrated anhydrobiotic ability. Here, we show that a new related species originating from Malawi, Polypedilum pembai sp.n. , is also anhydrobiotic and that its desiccation tolerance mechanism is probably similar to what is observed in P. vanderplanki. The new species, P. pembai sp.n. , is described with special attention to the common and different morphological features, compared with P. vanderplanki. Phylogenetic analysis showed that both species are closely related, suggesting that anhydrobiosis evolved only once in their common ancestor about 49 Ma somewhere in Africa, before the divergence of two species, one in the sub‐Saharan area and another in southeastern Africa. 相似文献
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HIDEO YAMAGISHI TAKAHIRO KUNISADA YOICHIRO IWAKURA YOSHITAKE NISHIMUNE YOKO OGISO AIZO MATSUSHIRO 《Development, growth & differentiation》1983,25(6):563-569
A small number of mouse embryos and embryonal carcinoma cells were pressed by mica sheet; then the extruded DNA complexes were adsorbed to mica and processed for electron microscopy. Extrachromosomal circular DNA complexes longer than 1 μm emerged during the compaction process of mouse embryos and during the differentiation of embryonal carcinoma cells induced with retinoic acid. These DNA molecules are discussed as possible products of developmental gene rearrangements occurring in the chromosomal DNA. 相似文献
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MARC OREMUS ROSEMARY GALES MEREL L. DALEBOUT NAOKO FUNAHASHI TETSUYA ENDO TAKAHIRO KAGE DEBBIE STEEL SCOTT C. BAKER 《Biological journal of the Linnean Society. Linnean Society of London》2009,98(4):729-744
Pilot whales (Globicephala spp.) provide an interesting example of recently diverged oceanic species with a complex evolutionary history. The two species have wide but largely non‐overlapping ranges. Globicephala melas (long‐finned pilot whale; LFPW) has an antitropical distribution and is found in the cold‐temperate waters of the North Atlantic and Southern Hemisphere, whereas Globicephala macrorhynchus (short‐finned pilot whale; SFPW) has a circumglobal distribution and is found mainly in the tropics and subtropics. To investigate pilot whale evolution and biogeography, we analysed worldwide population structure using mitochondrial DNA (mtDNA) control region sequences (up to 620 bp) from a variety of sources (LFPW = 643; SFPW = 150), including strandings in New Zealand and Tasmania, and whale‐meat products purchased on the markets of Japan and Korea. Phylogenetic reconstructions failed to support a reciprocal monophyly of the two species, despite six diagnostic substitutions, possibly because of incomplete lineage sorting or inadequate phylogenetic information. Both species had low haplotype and nucleotide diversity compared to other abundant widespread cetaceans (LFPW, π = 0.35%; SFPW, π = 0.87%) but showed strong mtDNA differentiation between oceanic basins. Strong levels of structuring were also found at the regional level. In LFPW, phylogeographic patterns were suggestive either of a recent demographic expansion or selective sweep acting on the mtDNA. For SFPW, the waters around Japan appear to represent a centre of diversity, with two genetically‐distinct forms, as well as a third population of unknown origin. The presence of multiple unique haplotypes among SFPW from South Japan, together with previously documented morphological and ecological differences, suggests that the southern form represents a distinct subspecies and/or evolutionary significant unit. © 2009 The Linnean Society of London, Biological Journal of the Linnean Society, 2009, 98 , 729–744. 相似文献
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SHIN-ICHIRO YASUDA TAKAHIRO MIYAZAKI KOUJI MUNECHIKA MASAMI YAMASHITA YOSHITAKA IKEDA AKIHITO KAMIZONO 《Journal of receptor and signal transduction research》2013,33(4):235-246
We attempted to determine natural agonists of GPR39 in fetal bovine serum (FBS). FBS was conditioned to extract peptides and fractionated by two types of HPLC. The activity of each fraction was monitored by intracellular calcium mobilization. Then the purified active ingredient was analyzed by inductively coupled plasma mass spectrometry. In this fashion, Zn2 + ion was identified as an agonist of GPR39, though no peptidergic molecules were found. The calcium-mobilizing activity of Zn2 + was not abolished by pertussis toxin but was by a phospholipase C (PLC) inhibitor, U73122, indicating that the activity of GPR39 is mediated through the Gqα -PLC pathway. In addition, Zn2 + also activated mouse and rat GPR39, showing that the function of GPR39 as a Zn2 + receptor is conserved across species. This study is the first exploration of GPR39 agonists in FBS and indicates that GPR39 functions as a Gq-coupled Zn2 +-sensing receptor. 相似文献