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排序方式： 共有81条查询结果，搜索用时 62 毫秒
1.
DU Yi-mei TANG Ming LIU Chang-jin HONG Zhi-gang KE Qin-mei DI Jiu-fang LUO Hong-yan HU Mou-xian HU Xin-wu XI Jiao-ya TANG Bi Jurgen Hescheler 《园艺学报》2004,20(9):1537-1541
AIM: To determine the role of Kv1.2, Kv1.5, Kv2.1 in the hypoxia pulmonary vasoconstriction (HPV). METHODS: Male Wistar rats were divided into two groups: normoxic group and hypoxic group. The single smooth muscle cell was obtained from pulmonary artery of Wistar rats with acute enzymatic digestion method. The conventional whole-cell patch clamp technique was used to record the resting membrane potential (Em) and the potassium currents of voltage-gated potassium channel (IKv) in rat pulmonary arterial smooth muscle cells (PASMC). Intracellular application of Kv1.2/Kv1.5/Kv2.1 antibodies (1∶125) was conducted through the whole-cell patch clamp system. RESULTS: ① Em of PASMC was depolarized after 24 h hypoxia compared with that of control cells . IKv of PASMC was decreased after 24 h hypoxia, . ② The mixture of Kv1.2/Kv1.5/Kv2.1 antibodies depolarized Em and inhibited IKv in PASMC from normoxic rat, whereas the mixture of Kir2.1/Kir2.3/Kir4.1 antibodies had no effects on them. ③ The mixture of Kv1.2/Kv1.5/Kv2.1 antibodies and the mixture of Kir2.1/Kir2.3/Kir4.1 antibodies had no effects on IKv and Em from rats hypoxic for 24 h. CONCLUSION: Kv1.2, Kv1.5, Kv2.1 might be oxygen sensitive potassium channels which mediated HPV. 相似文献
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Jürgen Schultze-Motel 《Genetic Resources and Crop Evolution》1989,37(2):415-426
Zusammenfassung In Fortsetzung einer früheren Arbeit werden archäologische Kulturpflanzenreste von weiteren Fundorten Georgiens beschrieben. Sie stammen aus dem 3. Jt. v. u. Z. bzw. dem Mittelalter.
Archaeological remains of cultivated plants from Georgia, USSR (Part 2)
Summary Archaeological remains of cultivated plants from some places in eastern Georgia are described (3rd millennium B.C. and Mediaeval age, respectively).
(2 )
. 3 . .相似文献
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Dr. K. Hammer M. Górski P. Hanelt F. Kühn W. Kulpa J. Schultze-Motel 《Genetic Resources and Crop Evolution》1981,29(1):91-97
Summary The wheat material of collecting missions to Czechoslovakia (in 1974 and 1977) and Poland (in 1976 and 1978) has been analyzed botanically and in respect to its possible breeding value by studying the original samples as well as their progenies grown up in the following years.The material represents populations of land-races and some old cultivars. Though there is a rapid genetic erosion in the collecting areas, the populations are very variable containing up to 6 botanical varieties. Some of the most variable land-races are described. In the populations ofTriticum aestivum land-races altogether 11 botanical varieties could be found, all with red grains. Exceptional findings are var.nigroferrugineum from the mountainous parts of Eastern Slovakia in 1977, and emmer wheat,Triticum dicoccon, from southern parts of Slovakia in 1974. The most promising characters for breeding purposes are short straw, winterhardiness, earliness, and field resistance against some diseases.In Gatersleben the land-races are separated into morphologically distinguishable types and maintained for their use in future breeding programmes.
Die Variabilität von Weizenlandsorten aus der SSR und Polen
Zusammenfassung Das Weizenmaterial der Sammelreisen in die SSR (1974 und 1977) und nach Polen (1976 und 1978) wurde botanisch und im Hinblick auf seinen möglichen züchterischen Wert anhand der Untersuchungen der Originalproben sowie ihres Nachbaus analysiert.Das Material besteht aus Landsortenpopulationen und einigen alten Sorten. Obwohl eine rasche Generosion in den Sammelgebieten zu verzeichnen ist, sind die Populationen sehr variabel und enthalten bis zu 6 Varietäten. Einige der variabelsten Landsorten werden beschrieben. In den Populationen vonTriticum aestivum-Landsorten konnten insgesamt 11 Varietäten gefunden werden; alle mit braunem Korn. Bemerkenswerte Funde sind var.nigroferrugineum aus den gebirgigen Regionen der östlichen Slowakei 1977 und Emmer,Triticum dicoccon, aus südlichen Gebieten der Slowakei 1974.Für züchterische Zwecke besonders aussichtsreiche Merkmale sind kurzer Halm, Winterfestigkeit, Frühreife und Feldresistenz gegenüber einigen Krankheiten.In Gatersleben werden die Landsorten in morphologische Typen aufgetrennt und für künftige Züchtungsaufgaben erhalten.
, (1974 1977 .) (1976 1978 .) , , ë , , . . , ë 6 . . Triticum aestivum , , 11 ; ë. var. nigroferrugineum 1977 . , Triticum dicoccon, 1974. : , , . .相似文献
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Summary Up till now numerical taxonomy has been applied to cultivated plants only to a limited extent though this method seems to be especially suitable for handling the great diversity of these plants. Moreover the theory of numerical taxonomy has not been studied sufficiently.Therefore studies with cultivated plants were begun with the aim to investigate the fitness of different numerical taxonomic techniques for their classification. Materials used: 1) 24 species ofTriticum and additionally 24 species ofAegilops 2) 1225Triticum taxa from Iran (mostlyT. aestivum) 3) 312 taxa ofPisum (mostlyP. sativum).Using 10 coefficients and 7 clustering methods inTriticum andAegilops in most cases a clear separation of both genera resulted as well as a species arrangement withinTriticum according to the genomes.The main aim when dealing with the wheat from Iran was the investigation of the influence of different character sets. At this the coefficient ofGower and the unweighted pair-group method using arithmetic averages (UPGMA) were applied. The separation of the different species is satisfying clear while the representatives of the different varieties ofT. aestivum could not always be found in one cluster. This effect increased when adding further characters sets.InPisum the influence of 11 similarity coefficients to the dendrogram formation has been investigated. With two-state characters the simple matching coefficient and with mainly multistate characters the Canberra metric gave best results (using UPGMA and information measures SUMRAT and SAMRAT).The hitherto existing results show the complicatedness of the evaluation of numerical taxonomic methods in their application to cultivated plants. Therefore generalizations are not yet possible.
Numerisch-taxonomische Studien in den GattungenTriticum L. undPisum L.相似文献
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Dr. Jürgen Schultze-Motel Dr. Reinhard Fritsch Dr. Karl Hammer Dr. Peter Hanelt Dr. Joachim Kruse Dr. Helga I. Maass Dr. Harald Ohle Klaus Pistrick 《Genetic Resources and Crop Evolution》1982,30(2):273-291
Summary Important papers on taxonomy and evolution of cultivated plants published in 1980 and 1981 were compiled and briefly discussed.
Herrn Prof. Dr. Dr. h. c. mult. H.Stubbe aus Anlaß der 80. Wiederkehr seines Geburtstages gewidmet. 相似文献
Taxonomie und Evolution der Kulturpflanzen: Literaturübersicht 1980/1981
Zusammenfassung Wichtige Arbeiten über Taxonomie und Evolution der Kulturpflanzen aus den Jahren 1980 und 1981 wurden zusammengestellt und kurz kommentiert.
: 1980–1981 .
, 1980 1981 . .
Herrn Prof. Dr. Dr. h. c. mult. H.Stubbe aus Anlaß der 80. Wiederkehr seines Geburtstages gewidmet. 相似文献
8.
Jürgen Schultze-Motel Reinhard Fritsch Karl Hammer Peter Hanelt Joachim Kruse Helga I. Maass Harald Ohle Klaus Pistrick 《Genetic Resources and Crop Evolution》1990,38(3):417-434
Summary Important papers on taxonomy and evolution of cultivated plants published in 1988 and 1989 were compiled and briefly discussed.
Taxonomie und Evolution der Kulturpflanzen: Literaturübersicht 1988/1989
Zusammenfassung Wichtige Arbeiten über Taxonomie und Evolution der Kulturpflanzen aus den Jahren 1988 und 1989 wurden zusammengestellt und kurz kommentiert.
: 1988–1989
, 1988 1989 . .相似文献
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