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梅花鹿胎盘脂质对果蝇寿命的影响 总被引:2,自引:1,他引:2
中医认为,鹿胎盘可补气养血、安神益精。笔者在做梅花鹿胎盘脂质抗衰老指标检测中,曾观察到该物质能延长小鼠持续游泳时间和增加大鼠常压耐缺氧时间,但指标特异性差,影响因素多。为了确认鹿胎盘脂质的抗衰老功能,进行了本试验。 相似文献
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为了探讨藏红花对果蝇寿命和生育力的影响,试验采用含藏红花提取液的培养基培养果蝇的方法,观察其对果蝇寿命和生育力的影响。结果表明:培养基中添加0.5%、1.0%和2.0%的藏红花提取液可使雌雄果蝇的平均寿命、最长寿命和最短寿命均高于对照组,其中1.0%浓度组雌雄果蝇的平均寿命和最长寿命与对照组相比显著或极显著延长(P<0.05或P<0.01);饲喂藏红花后,F1代果蝇数量与对照组相比无显著差异,F2代果蝇总数显著减少(P<0.05)。说明合适剂量的藏红花提取液能显著延长果蝇寿命,持续摄入高浓度藏红花会降低果蝇子代生育力。 相似文献
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果蝇Drosomycin基因(drs)的克隆鉴定 总被引:2,自引:0,他引:2
为了克隆Drosomycin基因用于今后定点诱变修饰和生物技术开发研究 ,根据果蝇Drosomycin基因 (drs)的cDNA序列 ,分别设计Drosomycin基因含和不含信号肽序列的两对特异引物Drs1/Drs2、Dro3/Dro4 ,由黑腹果蝇(DrosophilamelanogasterMeigen)基因组PCR扩增获得目的片段drs和dro ,克隆到表达载体pET 2 1d(+)和pHIL S1之中。经测序表明 ,克隆的drs与文献报道的drs序列仅在 +116位点有 1个碱基的差异 (A/T) ,而克隆的dro序列则与文献报道的dro序列完全相同。 相似文献
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本研究检验了扩增片段长度多态性(AFLPs)在定位寿命的数量性状基因座(QTL)中的应用。用来自黑腹果蝇中选种群的长寿和短寿近交系回交,寿命的度量被绘制成一种分布。从该分布的极端中筛选出与长寿相关的AFLP标记。为了检验它们与进一步重组的相关,第2个F1代又回交了3个世代并进行了度量。 相似文献
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为探索浆果类主要害虫黑腹果蝇Drosophila melanogaster的有效绿色防控方法,利用Y型嗅觉仪测定30种非寄主植物对黑腹果蝇的趋避效果。结果表明,30种非寄主植物中对黑腹果蝇具有趋避效果的植物较多,草本植物中小飞蓬、碰碰香、芫荽、姜(茎)、姜(叶)、大蒜(茎)、香叶天竺葵、鱼腥草和马蔺花对黑腹果蝇均有趋避作用,其中大蒜(茎)、姜(茎)、香叶天竺葵和姜(叶)的趋避作用较显著(P<0.05),趋避指数分别为98、56、48和32;木本植物中亮叶桦(树皮)、白珠、夜来香和迷迭香对黑腹果蝇具有显著的趋避效果(P<0.01),其中以亮叶桦(树皮)和白珠的趋避效果最佳,趋避指数分别为98和94。 相似文献
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为了研究板蓝根对果蝇生长发育的影响,以野生型果蝇为试验材料,在果蝇培养基中添加一定量的板蓝根颗粒,测量并记录F1代果蝇成虫的体重和体长。结果表明,在培养基中添加板蓝根可以提高果蝇成虫的平均体重和平均体长。该试验为在畜禽日粮中添加板蓝根提供了理论依据。 相似文献
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Copper is an important ingredient in fungicides, which are used for many economic plants. However, there is concern about the side‐effects of copper‐based fungicides due to their potential to affect beneficial mites. The purpose of the present paper was to investigate the effects of copper on the development of the fruit fly, Drosophila melanogaster. It was found that higher doses of copper significantly prolonged the developmental time of the fruit flies, especially during the larval stages. When 320 mg L‐1 copper‐contaminated food was used, most of the larvae died when they were small and before the pupal stage. The protein contents and esterase isozymes extracted from the larvae changed according to the doses of copper. The small‐molecular‐weight protein bands gradually became weaker or were lost as the copper levels increased. However, low doses of copper stimulated a stronger expression of a few proteins. These results indicate that low doses of copper generally have no lethal effects on D. melanogaster because a specific group of genes, which encode specific proteins, are probably activated in order to withstand the onslaught of stressful conditions. At high doses of copper in food (e.g. 320 mg L‐1), fly development and viability are significantly affected. 相似文献
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乌鸡黑色素在果蝇体内排铅解毒的研究 总被引:2,自引:0,他引:2
以黄体果蝇为实验动物,研究2种乌鸡黑色素添加水平(0.02mg/mL和0.2mg/mL)对果蝇在高铅(2mg/mL)条件下平均寿命和体内铅含量的影响。结果表明:乌鸡黑色素能显著提高果蝇的平均寿命(P<0.05),延寿率达70.2%和54.9%。与阳性对照(1262.0±363.1)μg/g相比,添加0.2mg/mL黑色素能显著(P<0.05)降低果蝇体内铅含量(949.7±38.4)μg/g达32.9%。因此,乌鸡黑色素对果蝇具有一定排铅解毒作用。 相似文献
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In Drosophila melanogaster, the male ejaculatory bulb is the site of synthesis of a male‐specific pheromone, cis‐vaccenyl acetate, which functions as both an attractant and an anti‐aphrodisiac. This long monounsaturated acetate is structurally similar to a number of shorter gland‐synthesized moth pheromones. The cell monolayer that forms the Drosophila male ejaculatory bulb wall is responsible for the production and secretion of cis‐vaccenyl acetate into the seminal fluid. When dissected bulbs were incubated with sodium [14‐C]‐acetate (or deuterated acetate), a labeled acetate ester was synthesized. The labeled acetate ester co‐migrated with cis‐vaccenyl acetate in thin layer chromatography. Incubation of the abdomens of males from which the ejaculatory bulbs had been removed, or the abdomens of females, with radiolabeled acetate did not yield any acetate ester, but did yield other lipid products, including hydrocarbons. When the isolated labeled acetate ester was hydrolyzed, no radioactive vaccenol was formed. This strongly suggests that the acetyl group is incorporated via a transacetylation reaction, but that the vaccenyl moiety is not synthetized in the blub. The transacetylation enzyme activity was localized in the microsomal subfraction of the bulb homogenate, and its affinity for vaccenol was not very different from that reported for monounsaturated alcohol substrates in moths. 相似文献
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对黑腹果蝇(Drosophila m elanogaster)抗真菌肽基因Drs和它的同系物基因Drs-lC在pET-21d载体中与T7.Tag标签序列进行了融合表达,并对融合表达产物进行Xa因子切割前后的抗菌活性测定。首先通过长引物PCR获得5′端带有Xa因子识别切割序列的Drs和Drs-lC,分别克隆至pET-21d表达载体上,然后转化E.coliO rigam i(DE3),筛选得到阳性克隆。以IPTG诱导目的基因与载体上的T7.Tag标签序列融合表达,将表达产物进行初步纯化后,以Xa因子进行切割处理,然后测定处理前后样品的抗菌活性。结果显示与T7.Tag标签序列融合表达的D rs、D rs-lC样品和经Xa因子切割后的样品对供试真菌黄色镰刀菌(Fusarium culm orum)、尖孢镰孢菌(Fusarium oxs-porum)和粗糙脉孢菌(Neuropora crassa)均有明显的抑制作用。 相似文献
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本试验以小鼠为动物模型,采用HTF和TCM-199两个基础培养体系,通过添加不同浓度的表没食子儿茶素没食子酸酯(EGCG),研究其对小鼠卵母细胞体外成熟、体外受精及其后期胚胎发育的影响。结果表明,在HTF和TCM-199体系中,培养卵丘-卵母细胞复合物(COCs)时EGCG的最佳添加量均为20μmol/L,可以显著提高卵母细胞的成熟率、受精率和胚胎发育率。过量添加EGCG则有负面的效应。综合比较,HTF体系的培养效果优于TCM-199体系。 相似文献
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类胡萝卜素延缓果蝇衰老作用的研究 总被引:1,自引:0,他引:1
从诺卡氏菌NO↑_5205菌株中提取类胡萝卜素,研究其对超氧阴离子的清除作用,观察其对果蝇寿命、头部超氧化物皮化酶(SOD)与过氧化脂质(MDA)含量的影响。结果表明:类胡萝卜素以核黄素和甲硫氨酸光照条件下生成的超氧阴离子有清除作用;能延长果蝇寿命;提高果蝇头部SOD活性,并降低过氧化脂质含量。 相似文献