共查询到20条相似文献,搜索用时 72 毫秒
1.
沼泽绿牛蛙的核型及银染研究 总被引:3,自引:0,他引:3
沼泽绿牛蛙的核型及银染研究樊连春,杨仲安,魏丽华,梁绍昌,桂建芳(中国科学院水生生物研究所武汉430072)关键词沼泽绿牛蛙,核型,Ag-NORsANINVESTIGATIONOFTHEKARYOTYPEANDAg-NORsOFRANAGRYLIO¥... 相似文献
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五种蚂蚁染色体核型研究 总被引:3,自引:0,他引:3
五种蚂蚁染色体核型研究杨秀芝,王俊森,柳劲松,王鑫(齐齐哈尔师范学院生物系161006)关键词蚂蚁,染色体,核型STUDIESONTHEKARYOTYPESOFCHROMOSOMESIN5SPECIESOFANTS¥YangXiuzhiWangJun... 相似文献
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阳宗海螺蛳和螺蛳的核型研究关键词核型,阳宗海螺蛳,螺蛳,田螺科THEKARYOTYPESTUDYOFMargaryayoungtsunghaiensisANDM.melanioides(VIVIPARIDAE)¥ChenYuanxiao;ZhangN... 相似文献
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裂叶翼首花的化学成分田军,吴风锷,邱明华,聂瑞麟(中国科学院昆明植物研究所植物化学开放研究实验室,昆明650204)(中国科学院成都生物研究所,成都610041)CHEMICALCONSTITUENTSFROMPTEROCEPHALUSBRETSCH... 相似文献
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被子植物核型胚乳细胞化机理研究的现状 总被引:1,自引:0,他引:1
被子植物核型胚乳细胞化机理研究的现状李师翁(庆阳师专生物系,甘肃西峰745000)ADVANCESINTHESTUDIESONTHEMECHANISMOFCELLULARIZATIONOFNUCLEARENDOSPERMINANGIOSPERMSLi... 相似文献
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三种观赏植物的染色体研究黄少甫,赵治芬(中国林科院亚热带林业研究所,浙江富阳311400)关键词翠菊,百日菊,溪荪,染色体,核型STUDIESONCHROMOSOMESOFTHREEGARDENPLANTS¥HuangShaofuandZhaoZhi... 相似文献
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叶绿体DNA及其在植物系统学研究中的应用 总被引:10,自引:0,他引:10
叶绿体DNA及其在植物系统学研究中的应用黄瑶,李朝銮,马诚,吴乃虎(中国科学院成都生物研究所,成都,610041)(中国科学院发育生物学研究所,北京,100080)CHLOHOPLASTDNAANDITSAPPLICATIONTOPLANTSYSTE... 相似文献
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Ca2+ efflux from dog red blood cells loaded with Ca2+ using the A23187 ionophore could be separated into two main components: (1) Mg- and ATP-dependent (active transport) and (2) dependent on external Na (K1/2 around 15 mM); at 80 microM internal free Ca the relative magnitudes of these fluxes were 70% and 30% respectively. The Na-dependent Ca2+ efflux had the following additional properties: (i) it was partially inhibited by ATP depletion or preincubation with vanadate, but it was not affected by Mg2+ depletion; (ii) it failed to be stimulated by external monovalent cations other than Na: (iii) it was stimulated by reduction in the internal Na+ concentration. Both active and Na-dependent Ca2+ efflux remained unchanged in hypotonic solutions or in solutions with alkaline pH (8.5). In cells containing ATP and Mg2+, external Ca2+ inhibited Ca2+ efflux (K1/2 around 1 mM); on the other hand, in Mg-free dog red cells external Ca2+ stimulated Ca2+ efflux (K1/2 about 30 microM). In Mg-depleted red cells incubated in the absence of external Na2+, Ca2+ influx as a function of external Ca2+ followed a monotonically saturable function (K1/2 around 20 microM): addition of Na resulted in (i) inhibition of Ca2+ influx and (ii) a sigmoid relationship between flux and external Ca2+. Intracellular Ca2+ stimulated the external Na-dependent Ca2+ efflux along a sigmoid curve (K1/2 around 30 microM); on the other hand the Ca pump had a biphasic response to internal Ca2+: stimulation at low internal Ca2+ (K1/2 between 1 and 10 microM), followed by a decline at internal Ca2+ concentrations higher than 50 microM. 相似文献
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How many species are there within the genus Acipenser? 总被引:7,自引:0,他引:7
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Endogenous gibberellins (GAs) were extracted and purified from apical buds of Eucalyptus nitens (Deane and Maid.) Maid. and the cambial region of E. globulus (Labill.). then analysed by capillary gas chromatography-mass spectrometry. GA1 GA19 GA20 and GA29 were identified by full scan mass spectra. Kovats retention indices and high resolution selected ion monitoring. Using deuterated internal standards. GA1 . GA19 . GA20 and putative GA29 and GA53 were quantified in the apical buds, while GA4 . GA8 . GA9 and GA44 were shown to be either absent or present at very low levels. From the cambial region. GA1 and GA20 were quantified at levels of 0.30 ng (g fresh weight)-1 and 8.8 ng (g fresh weight)-1 respectively. These data suggest that the early 13-hydroxylation pathway is the dominant pathway for GA biosynthesis in Eucalyptus . 相似文献
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本文报道链格孢属的2个新种:寄生在苦木科(Simaroubaceae)臭椿[Ailanthusaltissima(Mill.)Swingle]上的臭椿链格孢(Alternariaailanthispnov),寄生在桦木科(Betulaceas)黑桦(BetuladahuricaPall.)上的桦木链格孢(A.betalaesp.nov.),2个新组合:豆链格孢[A.azukiae(Hara)comb.nov.],蔷薇生链格孢[A.rosicola(Rao)comb.nov.]和1个新名称红花链格孢(A.carthami-tinctoriinom.nov)。文中为新种提供了拉丁文简介、描述和图。模式标本保藏在山东农业大学植物病理标本室(HSAUP)。 相似文献
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Four new species of the genus Aristolochia (Aristolochiaceae) are described as
new from China. They are Aristolochia austrochinensis C. Y. Cheng & J. S. Ma, A. caulialata
C. Y. Wu, A. salweenensis C. Y. Cheng & J. S. Ma, and A. kunmingensis C. Y. Cheng &J. S. Ma. A naturalized species, A. ringens Vahl is also reported. 相似文献
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本文对来自我国20个省、市、自治区的不同基物上分离的和中国科学院微生物研究所菌种保藏室以及其他单位提供的黄曲霉群菌种,经随机选取82株进行了黄曲霉毒素B_1的测定,证明在测试的9个已知分类群中产生黄曲霉毒素B_1的菌种只限于寄生曲霉和黄曲霉,另外4株种名未定者也能产生此种毒素。在黄曲霉中产毒菌株约占30%(28.3%),其在GAN(葡萄糖硝酸铵)和大米培养基中的黄曲霉毒素B_1的最高产量分别为133,333.3和160,000.0ppb。总的来说,大体上可以反映在我国一般基物上黄曲霉产毒菌株存在的现状。在实验过程中,还对黄曲霉群菌种在GAN和大米培养基中黄曲霉毒素B_1的产量和产毒菌株数作了比较。发现在大米培养基中黄曲霉毒素B_1的产量高于GAN,而且测试的黄曲霉产毒菌株在这两种培养基中均各有不能产毒的菌株,因此,在测定产毒菌株时,若仅采用其中一种产毒培养基,往往会有漏掉产毒菌株的可能性。 相似文献
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Tseng Yung-chien 《植物分类学报:英文版》1993,31(4):362-367
The genus, Ainsliaea DC. from China is revised in this paper. Three
species, A. nana Y. C. Tseng, A. pingbianensis Y. G. Tseng and A. trinervis Y.
C. Tseng, are newly described; two species, A. chapaensis Merr. and A.
angustifolia Hook. f. et Thoms. ex C. B. Clarke are new records for China and
two new combinations, A. apteroides (Chang) Y. C. Tseng and A.
macrocephala (Mattf.) Y. C. Tseng, are made. In addition, one species, A.
hypoleuca Diels ex Limpr. and four varieties, A. bonatii Beauverd var.
arachnoidea Beauverd, A. pteropoda DC. var. leiophylla Franch., A. elegans
Hemsl. var. tomentosa Mattf. and A. glabra Hemsl. var. tenuiculis (Mattf.)Chang, are reduced to synonyms. 相似文献
18.
实验室恒温条件下,研究了园蛛属3种园蛛——角园蛛(Araneus cornutus),叶斑园蛛(A.sta),大腹园蛛(A.ventricosus)的各龄幼蛛。描述它们各自的形态特征;指出它们之间的形态差异。 相似文献
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本文对来自我国20个省、市、自治区的不同基物上分离的和中国科学院微生物研究所菌种保藏室以及其他单位提供的黄曲霉群菌种,经随机选取82株进行了黄曲霉毒素B_1的测定,证明在测试的9个已知分类群中产生黄曲霉毒素B_1的菌种只限于寄生曲霉和黄曲霉,另外4株种名未定者也能产生此种毒素。在黄曲霉中产毒菌株约占30%(28.3%),其在GAN(葡萄糖硝酸铵)和大米培养基中的黄曲霉毒素B_1的最高产量分别为133,333.3和160,000.0ppb。总的来说,大体上可以反映在我国一般基物上黄曲霉产毒菌株存在的现状。在实验过程中,还对黄曲霉群菌种在GAN和大米培养基中黄曲霉毒素B_1的产量和产毒菌株数作了比较。发现在大米培养基中黄曲霉毒素B_1的产量高于GAN,而且测试的黄曲霉产毒菌株在这两种培养基中均各有不能产毒的菌株,因此,在测定产毒菌株时,若仅采用其中一种产毒培养基,往往会有漏掉产毒菌株的可能性。 相似文献