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1.
红褐斑腿蝗血细胞的形态与分类 总被引:1,自引:0,他引:1
利用光学显微镜和显微数码拍照系统,对红褐斑腿蝗Catantops pinguis(Stal)血细胞的形态进行观察和分类。结果在红褐斑腿蝗血淋巴中观察到5种血细胞,分别是原血胞、浆血胞、粒血胞、珠血胞和囊血胞。原血胞为小型圆形细胞,边缘圆滑、清晰,核质比例很大。粒血胞多为中型,形状不规则,边缘凹突不平,内含较大的异质性溶酶体颗粒。浆血胞多为中型,刚离体时形状较规则,常呈圆形、卵圆形。浆血胞内缺乏大的颗粒,细胞核大而圆形,细胞质内具许多小型颗粒状物质。浆血胞离体后形状变化较多,常发展出伪足,呈丝状、短芒状、钩状或片状伪足。珠血胞多为大、中型,外形大体呈圆形,但边缘由于大小不等的珠形内含物突出,呈花瓣状。囊血胞多为中型,圆形或椭圆形,细胞质内具有大小不一的带有折光性的颗粒或块状物,细胞边缘比较光滑。 相似文献
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红褐斑腿蝗的耐寒能力及其季节性变化 总被引:4,自引:0,他引:4
用测定过冷却点的方法研究了红褐斑腿蝗(Catantops pinguis (Stal))在不同季节的抗寒能力,并就虫体含水量、粗脂肪、总蛋白和总糖等成分在不同季节的变化及其对过冷却点的影响进行了探讨.结果表明,红褐斑腿蝗的过冷却点存在显著的季节性差异,依次为秋季种群((-23.1 ± 0.2 )℃)< 越冬后种群((-19.3 ± 0.1) ℃)< 夏季种群((-4.0 ± 0.1) ℃).含水率在生长期极显著高于越冬期,越冬初期和越冬后期变化不大,说明红褐斑腿蝗在越冬准备期已排出了体内多余的游离水.越冬后蝗虫体内总糖含量和脂肪含量均显著低于越冬初期,说明蝗虫在越冬时主要靠消耗体内的碳水化合物和脂肪物质来维持体温,体内的营养物质消耗极大,导致越冬后过冷却点显著上升.含水率和含脂率在两性间差异不显著,雌性蝗虫的总蛋白含量在夏季种群略高于雄性,越冬期显著低于雄性,可能与雌蝗孕卵过程中动用了大量营养物质有关. 相似文献
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红褐斑腿蝗的食物消耗与利用及其对温度的依赖性 总被引:3,自引:0,他引:3
昆虫是变温动物 ,外界温度的波动会影响昆虫的体温 ,这也必然会影响昆虫的新陈代谢 ,从而引起一系列生理生化反应。红褐斑腿蝗 [Catantopspin guis(Stal) ]是浙江农田常见的蝗类害虫 ,分布广 ,数量多 ,常为害玉米 (Zeamays)、豆类 (Glycinemax)及茶树 (Camlliasinensis)。据作者观察 ,该种蝗虫常以成虫越冬 ,而浙江省冬季最冷的 1月份平均气温为 2 5~ 7 5℃ ,极端低温多年平均在 - 8℃以下。文献研究表明 ,红褐斑腿蝗的过冷却点可达 - 2 0℃以下 (有关结果拟另文发表 ) ,显示其具… 相似文献
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为评价pH对红褐斑腿蝗Catantops pinguis (Stål)中肠蛋白酶活性的影响, 本文用3种专性底物测定了不同pH环境下蝗虫中肠类胰蛋白酶和类胰凝乳蛋白酶的活性。结果表明: 雄性红褐斑腿蝗中肠肠液的pH值为6.92±0.043, 雌性为7.03±0.054, 两性间差异不显著(P>0.05)。并且发现3种蛋白酶的最适pH值各不相同, 其中雌雄虫的强碱性类胰蛋白酶(以BAPNA为底物)最适pH分别为8.5和10.5; 雌雄虫的弱碱性类胰蛋白酶(以TAME为底物)最适pH分别为9.0和9.5; 而雌雄虫的类胰凝乳蛋白酶(以BTEE为底物)最适pH雌性为8.5, 雄性为8.0。统计结果显示, pH对红褐斑腿蝗中肠蛋白酶活性影响显著(P<0.01), 两性间蛋白酶活性差异显著(P<0.01)。在最适pH情况下, 雌性的类胰蛋白酶活性高于雄性, 而类胰凝乳蛋白酶活性则是雄性高于雌性。在中肠pH范围内雌性比雄性具有更高的消化蛋白酶活性, 显示雌性具有较强的食物处理能力以摄取更多的营养物质为繁殖活动(孕卵)作准备, 而该种蝗虫最适pH范围较宽, 可能与其取食植物范围较宽有关。 相似文献
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《生命科学研究》2015,(5):392-396
用蒸馏水沉淀法、Sephacryl S-300 High Resolution Hiprep 26/60葡聚糖凝胶层析、蛋白质电泳的方法提取和纯化了拟环纹豹蛛Pardosa pseudoannulata的卵黄蛋白,并对其性质进行了分析。用蒸馏水沉淀法能得到卵黄蛋白粗提液,将得到的卵黄蛋白粗提液用Sephacryl S-300 High Resolution Hiprep 26/60凝胶柱过滤,可以得到纯化的卵黄蛋白。电泳结合不同的染色方法证明拟环纹豹蛛卵黄蛋白是一种糖脂复合蛋白,它由2个亚基组成,亚基的相对分子质量分别为80.1 k D和57.4 k D。 相似文献
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用凝胶过滤与离子交换层析、蛋白质电泳和糖脂蛋白染色等方法提取纯化长角血蜱Haemaphysalis longicornis卵黄蛋白,并对其性质进行了研究。PAGE和SDS-PAGE分析表明,长角血蜱的卵黄蛋白只有一种,由8个亚基组成,亚基的相对分子质量分别为112 kD, 103 kD, 80 kD, 78 kD, 71 kD, 68 kD, 62 kD和52 kD,卵黄蛋白经苏丹黑B和希夫试剂染色呈阳性,表明是一种含血红素的糖脂蛋白。 相似文献
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蚯蚓纤溶酶的分离纯化及性质 总被引:17,自引:0,他引:17
蚯蚓纤溶酶的分离纯化及性质邢宝东殷慎敏茹炳根(北京大学生命科学学院生物化学及分子生物学系,北京100871)关键词蚯蚓;纤溶酶;纤维蛋白收搞日期:1997-01-21;接收日期:1997-03-27。蚯蚓作为中药已有悠久历史,许多中医都把它作为活血药... 相似文献
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阔鳞鳞毛蕨[Dryopteris championi(Benth.)C.CHr.]的叶片组织经硫酸铵沉淀、活性炭柱及DEAE-SepharoseFF离子交换柱等步骤纯化得到鳞毛蕨凝集素(Dryopteris championi lectin)。纯化的鳞毛蕨凝集素(DCL)在聚丙烯酰胺凝胶电泳上显示1条蛋白质着色带。其中性糖含量高,氨基酸组成中队(苯丙氨酸)含量最高,His(组氨酸)含量最低。对不同动物红细胞及人的不同血型红细胞的凝集有专一性。其凝血活性能被果糖、半乳糖和N-乙酰半乳糖胺所抑制,对温度变化较不敏感,Mn^2 和Mg2 在一定浓度范围能激活其为EDTA-Na2所抑制的活性。 相似文献
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为探讨12a-羟基鱼藤酮对斜纹夜蛾Prodenia litura (Fabricius)生殖力的影响及其作用机理, 本文测定了该虫取食12a-羟基鱼藤酮后的产卵量。在用高效液相色谱仪确定其卵巢组织中存在12a-羟基鱼藤酮后, 通过MTT法测定该化合物对斜纹夜蛾卵巢细胞(PL细胞)的细胞毒性,并利用流式细胞仪检测该化合物对PL细胞细胞周期、膜电位、胞内钙离子浓度、线粒体膜电位的影响。结果表明:斜纹夜蛾幼虫取食12a-羟基鱼藤酮后产卵量下降80%以上, 并从卵巢组织中检测出该化合物。12a-羟基鱼藤酮对PL细胞增殖具有抑制活性, 其IC50为6.6 mg/L。该化合物将PL细胞周期阻滞于S期, 导致PL细胞膜电位、线粒体膜电位和细胞内游离钙离子浓度均显著升高。该化合物导致斜纹夜蛾繁殖力降低。12a-羟基鱼藤酮将PL细胞增殖阻滞于细胞周期的S期。同时, 该化合物对卵巢细胞具有较弱的毒杀活性, 导致一些卵巢细胞死亡。由于上述原因, 卵巢细胞数量逐渐减少而导致卵巢管萎缩。卵巢管的萎缩使卵巢管内的卵母细胞不能发育成卵细胞, 故其生殖力下降。 相似文献
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Sasha M. Daskalova 《Archives of insect biochemistry and physiology》1995,29(3):227-242
A single vitellin was identified in the eggs of the wheat bug, Eurygaster integriceps, and purified by a two-step procedure including ion exchange and gel permeation chromatography. Its nondenatured molecular mass is estimated to be 385 kDa. Under reducing conditions—SDS-PAGE—the wheat bug vitellin gives five polypeptides at 110 kDa, 80 kDa, 69 kDa, 53 kDa, and 38 kDa. Its amino acid composition is characterized by high content of aspartic acid/asparagine and glutamic acid/glutamine and low content of methionine and histidine. The lipid moiety (5.65% by weight) includes diacylglycerols, cholesterol, phosphatidylethanolamine, phosphatidylcholine, and sphingomyelin. Carbohydrate content amounts to 4.54% by weight. A part of the wheat bug vitellin is dimerized during the course of deposition into the yolk granules. © 1995 Wiley-Liss, Inc. 相似文献
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本文通过聚丙烯酰胺凝胶电泳(SDS—PAGE)法,分析了蓖麻蚕卵黄蛋白质组分,对即黄磷蛋白(Vitellin Vn.)进行了鉴定、纯化,并制备了抗血清。对卵黄磷蛋白的分子量及相对含量进行了测定。并证明卵黄磷蛋白若处在酸性pH条件下能降解。 相似文献
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During Blattella germanica embryo development, the nutritive yolk protein vitellin is processed by a cysteine protease, which is activated proteolytically from a proprotease during acidification of yolk granules. A murine polyclonal antiserum was generated with the purified proprotease as the immunogen. The antiserum was made monospecific to proprotease by subtractive affinity chromatography using proprotease-free yolk proteins as ligand. The purified antibodies were employed to investigate the temporal and spatial expression of the proprotease during vitellogenesis and embryo development. Anti-proprotease-reactive peptides appeared in extracts of fat bodies and ovarian follicles of post-mating females, but not in fat bodies of males or the fat bodies or follicles of unmated females, suggesting that the proprotease is synthesized extraovarially. Use of the antibodies was extended to monitor the kinetics of proprotease disappearance during early embryo development. Arch. Insect Biochem. Physiol. 38:109–118, 1998. © 1998 Wiley-Liss, Inc. 相似文献
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Noriaki Agui Masakazu Takahashi Yoshito Wada Susumu Izumi Shiro Tomino 《Journal of insect physiology》1985,31(9):715-722
The effect of adult nutrition on oögenesis during the first gonotropic cycle was studied in three strains of the housefly, Musca domestica. Two of the strains were anautogenous and the third was autogenous. In these strains, three subunits (51, 43 and 42 kdaltons) of vitellogenin and vitellin were electrophoretically identical using SDS-PAGE electrophoresis for haemolymph proteins of vitellogenic females and for egg extracts. Each developmental stage of the ovary in individual females flies of both autogenous and anautogenous strains fed on either sugar or protein clearly reflected the appearance of electrophoretic bands for vitellogenin and vitellin. Using immunological analysis, a very small amount of vitellogenin was detectable in the haemolymph of previtellogenic flies. The highest level of vitellogenin appeared in the haemolymph at the middle of vitellogenic phase and reached about 25% of the total haemolymph protein. There were differences in vitellogenin concentration in females with mature eggs between the two anautogenous strains: vitellogenin was not detectable in one strain, and the other showed 30% of the maximal level. 相似文献
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Hiroyuki Horitsu Toshimi Satake Kiyoshi Ogawa Mikio Tomoyeda 《Bioscience, biotechnology, and biochemistry》2013,77(9):1667-1672
5′-Guanosine monophosphate (5′-GMP) was found to leak from Candida lipolytica (IFO, 0746) and its mutant Y and Sm.Mutant Sm obtained from the parent strain by treatment with N-methyl-N′-nitro-N-nitrosoguanidine (NTG) and ultraviolet irradiation was found to leak 5′-GMP at 5 times the amount of the parent strain. The properties of mutant Y and Sm were compared with the parent strain, and differences were present in growth, amount of 5′-GMP leakage and ribonuclease activity. 相似文献