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玉米盐溶蛋白电泳法是快速鉴定玉米种子纯度的一种方法。其原理是从玉米种子中提取盐溶蛋白在聚丙烯酰胺凝胶的浓缩效应、分子筛效应和电泳分离的电荷效应作用下．得到良好的分离．通过染色显示蛋白质谱带类型。不同玉米品种,由于遗传组成的不同,种子内所含的蛋白质种类有差异．这种差异可利用电泳图谱加以鉴别． 相似文献
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以往确定小麦醇溶蛋白和高分子及低分子麦谷蛋白的亚基组分,需要3个独立的单向电泳分离过程.本文所述及的方法只需要两个电泳步骤.用2-氯乙醇提取蛋白质之后,先在酸性条件下进行聚丙烯酰胺凝胶电泳(A-PAGE)分离,测定麦醇溶蛋白组分.然后,将位于A-PAGE凝胶板点样槽紧下面的几个毫米内的非还原聚合蛋白经过还原并用SDS-聚丙烯酰胺凝胶电泳(SDS-PAGE)分离,这些蛋白质便可产生反映麦谷蛋白高分子和低分子亚基特性的多肽模式. 相似文献
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玉米盐溶蛋白聚丙烯酰胺凝胶电泳技术的工作原理,是从玉米种子中提取的盐溶蛋白在聚丙烯酰胺凝胶的浓缩效应、分子筛效应和电泳分离的电荷效应作用下得到良好分离,通过染色显示蛋白质谱带类型;根据分子遗传学的理论, 相似文献
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不同的聚丙烯酰胺凝胶电泳(PAGE)分析方法所提供的测定结果,无法进行直接比较。有鉴于此,作者提出了一种小麦醇溶蛋白PAGE标准分析法。本标准分析法所用仪器及试剂均购自市场。应用此法可消除某些可变因素(如乳酸铝的纯度及浓度、凝胶的类型及制备等)的不利影响,也可保证小麦醇溶蛋白分离的再现性。另外,此法还可使醇溶蛋白电泳带较明显。 相似文献
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油菜不同器官高质量总蛋白提取方法和双向电泳体系的优化 总被引：4，自引：0，他引：4
以显性核不育油菜Shaan-GMS不育株和可育株的花序和叶片为材料,采用TCA（三氯醋酸）-丙酮法提取油菜花蕾、花药及叶片总蛋白,对总蛋白提取方法、IPG（固定pH梯度）胶条种类、聚焦程序、凝胶浓度、上样量等环节进行了优化。结果表明,采用理想的蛋白质裂解液（7 mol/L 尿素,2 mol/ L 硫脲,4% CHAPS（3-[3-(胆酰氨丙基)二甲氨基]丙磺酸内盐）,65mmol二硫苏糖醇,0.5% IPG缓冲液 pH 3~10或pH 4~7,全蛋白酶抑制片剂 (片／10 ml)）裂解蛋白,以150μg上样,按IEF程序Ⅱ(30V,12Hr;200V,1Hr;500V,1Hr;1000V,0.5Hr;10000V,2Hr;10000V,80000VHr)进行等电聚焦,10%SDS-PAGE胶浓度进行第二向电泳,银染方法检测,可得到背景清晰、分辨率较高的油菜花蕾、花药及叶片蛋白质电泳图谱。高质量油菜蛋白的提取方法和蛋白质分离双向电泳体系的优化可为油菜蛋白质组学研究奠定技术基础。 相似文献
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适用于大豆叶片蛋白质组分析的双向电泳最佳条件研究 总被引：1，自引：1，他引：0
针对大豆叶片中蛋白含量较低,含有大量色素、酚类、醌类等次生代谢产物干扰蛋白质双向电泳分离效果的问题,以大豆叶片为材料,对样品制备、蛋白质裂解液组分、等电聚焦(IEF)参数等条件进行研究.结果表明:采用TCA/丙酮法提取大豆叶片总蛋白,裂解缓冲液为9 mol·L-1尿素,2 mol·L-1硫脲,4%CHAPS.100 mmol·L-1DTT,0.5%Bio-Lyte,IEF等电聚焦条件为24 000Vh时,2-DE图谱分离到的蛋白点效果最好.初步建立了一套适用于大豆叶片蛋白质组分析的双向电泳(2-DE)体系. 相似文献
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利用Native-PAGE鉴定大豆Lox同工酶 总被引：1，自引：0，他引：1
以Lox缺失体五星1号、3号、4号和非缺失类型大豆中黄13种子为材料,采用非变性聚丙烯酰胺凝胶电泳(Native-PAGE),通过改变分离胶浓度、电泳电压、样品浓度、电泳时间和染色方法等,探索大豆Lox同工酶电泳最佳条件。结果表明:浓缩胶浓度5%,分离胶浓度13%,浓缩胶电泳电压90 V、分离胶电泳电压190 V,样品浓度40%,电泳时间7 h,采用pH8.0、pH6.5两种不同的酶染液结合热考马斯亮蓝染色,4种Lox同工酶(Lox1、Lox2、Lox3a和Lox3b)的分辨清晰度最高。该方法简便安全、经济有效,可用于大豆种质资源Lox缺失体的筛选鉴定。 相似文献
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Sena L.P. VanderJagt D.J. Rivera C. Tsin A.T.C. Muhamadu I. Mahamadou O. Millson M. Pastuszyn A. Glew R.H. 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,52(1):17-30
In the western Sahel, indigenous plants become important staples when cereal harvests are inadequate to support populations inhabiting that region of Africa. The purpose of this study was to assess the nutrient content of several of these edible wild plants. The leaves of the following seven plant foods were analyzed: Ziziphus mauritiana, Cerathotheca sesamoides, Moringa oleifera, Leptadenia hastata, Hibiscus sabdarifa, Amaranthus viridi, and Adansonia digitata. The fatty acid, vitamin E, carotenoid, selected mineral and amino acid contents of these plant foods were determined. These same analyses were performed on the fruit of the Adansonia digitata. In quantitative and qualitative terms, Amaranthus viridis was found to be an excellent source of protein. Its amino acid composition compared favorably to that of a World Health Organization (WHO) protein standard. It also contained considerable amounts of the two fatty acids that are essential in humans (linoleic and -linolenic) and a number of minerals including iron, magnesium, calcium and zinc. The leaves of Hibiscus sabdarifa contained an appreciable quantity of protein the composition of which was comparable to the WHO standard. The mineral content of the leaves of this plant was also exceptionally high; noteworthy was its high zinc content. H. sabdarifa also contained significant quantities of the two essential fatty acids. Ziziphus mauritiana was an excellent source of the essential fatty acid linoleic acid and several of the metals including iron, calcium, magnesium and zinc. Its content of other essential nutrients, however, was rather low. In general, Adansonia digitata leaves were nutritionally superior to the fruit of the tree; however, the fruit did contain useful quantities of potassium, phosphorus, zinc and -linolenic acid. The Leptadenia hastata leaves were an especially good source of lutein and -carotene. These data should be useful to the people who inhabit the western Sahel in helping them devise healthy diets during times when cereal staples are in short supply. 相似文献
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通过电解质外渗法和匍匐茎恢复试验对‘阳江’狗牙根及其12个通过形态鉴定选出的坪用价值高且花序密度低的诱变后代进行抗寒性鉴定。电解质外渗法结果表明:诱变后代间的抗寒性具有较大差异,其叶片半致死温度(LT50)的变异范围为-7.6～-0.2℃(最低值与最大值相差7.4℃);参试材料抗寒性由强到弱依次为M18>M4>M26>M28> M22>阳江>M29>M31>M10>M37>M16>M1>M25,其中,有5个诱变后代抗寒性优于亲本,分别是M18、M4、M26、M28、M22。匍匐茎恢复实验结果表明:诱变后代M1、M22、M26、M31、M25在0℃和-5℃低温胁迫后的恢复生长率都高于亲本,恢复能力均优于亲本;M10、M37、M28在-5℃低温胁迫下,恢复生长能力低于亲本,抗寒性相对较弱,M16和M4在0℃和-5℃低温胁迫下,恢复生长率都低于亲本,抗寒性明显弱于亲本。综合2种方法鉴定结果显示:诱变后代M1、M25的恢复能力较强;M4、M28的叶片抗寒性较好,青绿期较长;M22、M18、M26的叶片抗寒性和匍匐茎恢复能力均较强;M29,M31的叶片抗寒性和匍匐茎恢复能力与亲本相似;M10、M16、M37的叶片抗寒性和匍匐茎恢复能力均较弱,整体抗寒性较弱。 相似文献
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橡胶树丛枝病病原的抗血清制备与应用 总被引：5，自引：1，他引：4
以感染橡胶树丛枝病病原的长春花为材料,制备得到橡胶丛枝病病原菌抽提液,以抽提液为抗原免疫家兔,制备抗血清,经微量沉淀测定,抗血清效价为１：２０４８。应用橡胶丛枝病抗血清检测橡胶褐皮病,无症苗木检出率达３０％－３７％,可疑的褐皮病树检出率达８５．７％。 相似文献
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R. W. Summers 《Crop Protection》1989,8(6):451-454
One hundred and fifty-six pre-roost gatherings of starlings were observed at 28 sites around a roost in west Norfolk during winter. Pre-roost gatherings occurred more frequently at individual farmyards compared with individual fields, but 82% of the sites where gatherings occurred were on fields. The size of gatherings was greater, the closer to the roost. Birds in pre-roost gatherings on fields of autumn-sown winter wheat spent most of the time feeding and had a diet composed almost exclusively of wheat seeds. Birds in gatherings on grass fields also fed intensively whereas only 31% of birds at farmyards were feeding. The implications that these results have with regard to potential damage to fields of winter wheat and around farmyards are discussed. 相似文献
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以‘福桐’、‘绿桐’2个无性系与10个不同种源的白花泡桐个体为研究对象,采用ISSR分子标记对12份白花泡桐材料的亲缘关系进行研究,并利用DPSv3.01进行聚类分析。结果表明：10条引物共扩增出66条条带,其中有37条多态带,多态性比例为56.1%。根据ISSR聚类分析结果,在遗传距离为0.35时,12份白花泡桐材料可分为5类,第1类为‘福桐’无性系与河南、河北种源个体;第2类为‘绿桐’无性系与湖南、湖北、江苏种源个体;第3类为浙江、广东种源个体;第4类为江西、福建种源个体;第5类为广西种源个体。此结果 相似文献
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Insect pest management is facing the economic and ecological challenge worldwide due to the human and environmental hazards caused by majority of the synthetic pesticide chemicals. Identification of novel effective insecticidal compounds is essential to combat increasing resistance rates. Botanicals containing active insecticidal phytochemicals appear to be promising to address some of these problems. Therefore, there is a continuous need to explore new active molecules with different mechanisms of action. Secondary metabolites present in plants apparently function as defense (toxic), which inhibits reproduction and other processes. The phytochemical biomolecules could be used for maximizing the effectiveness and specificity in future insecticide design with specific or multiple target sites, while ensuring the economic and ecological sustainability. In this article, the current state of knowledge on phytochemical sources and insecticidal activity, their mechanism of action in insects, resistance, and promising advances made in phytochemical research are reviewed. 相似文献
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为深入研究昆虫病原真菌蝉拟青霉疏水蛋白PChyd基因的功能,根据蝉拟青霉基因组信息克隆疏水蛋白PChyd基因,对该基因序列进行生物信息学分析,使用qRT-PCR技术对其在不同培养条件或阶段下的表达模式进行分析,并通过酶切酶连的方法构建了该基因的敲除载体。结果表明：PChyd基因的开放阅读框序列全长303 bp,编码100 aa,包含22 aa的信号肽序列和70 aa疏水蛋白功能区域。系统发育分析显示该基因与粗糙虫草菌亲缘关系最近。qRT-PCR结果显示PChyd基因在PDA培养的菌丝体、诱导的附着胞、诱导的芽生孢子中表达量显著高于另外2个样品,其中芽生孢子表达量最高,暗示该基因在蝉拟青霉侵染初期和在昆虫血腔中定殖阶段可能具有重要作用。凝胶电泳结果表明,成功构建了该基因的敲除载体,扩增出含有上臂、HPH、下臂的3356 bp左右的片段。本研究为进一步探究蝉拟青霉疏水蛋白PChyd基因的致病机理、生防工程菌的改造奠定了基础。 相似文献