共查询到19条相似文献,搜索用时 218 毫秒
1.
1种子贮藏蛋白电泳技术
贮藏蛋白是种子的主要成分,也是基因表达的产物,几乎所有作物种子贮藏蛋白都具有特异性,且容易分离和提取。此技术就是根据种子贮藏蛋白的这些特点利用电泳中谱带的多态性来鉴定品种的真实性和纯度。通常种子中所含蛋白质可分为4类,即清蛋白、球蛋白、醇溶蛋白和谷蛋白。每一类蛋白质的比例因作物种类不同而有差异,如水稻含有高水平的谷蛋白, 相似文献
2.
3.
小麦籽粒蛋白质组分含量及其加工品质的关系 总被引:1,自引:0,他引:1
应用反相高效液相色谱(RP-HPLC)法,对12个小麦品种籽粒的清蛋白+球蛋白、醇溶蛋白和谷蛋白,高分子量谷蛋白亚基(HMW-GS)、低分子量谷蛋白亚基(LMW-GS)进行了分离量化,并根据谷蛋白含量、贮藏蛋白含量及面团稳定时间3个指标对其聚类分析。结果表明,不同小麦品种蛋白质各组分含量存在差异,其中贮藏蛋白的含量是决定蛋白质总含量的主要因素。HMW-GS含量、LMW-GS含量、谷蛋白总含量均与面团形成时间、稳定时间及沉降值呈极显著正相关;HMW-GS含量与LMW-GS含量的比值(HMW/LMW)与面团形成时间和稳定时间呈极显著正相关;醇溶蛋白含量与谷蛋白含量的比值(Gli/Glu)与面团稳定时间呈显著负相关,醇溶蛋白含量与HMW-GS含量的比值(Gli/HMW-GS)与面团形成时间和稳定时间均呈极显著负相关。籽粒中具有较高的贮藏蛋白含量、HMW-GS含量、LMW-GS含量和HMW/LMW及较低的Gli/Glu有利于提高强筋小麦的加工品质。 相似文献
4.
小麦籽粒蛋白质组分含量及其加工品质的关系 总被引:4,自引:1,他引:4
应用反相高效液相色谱(RP-HPLC)法,对12个小麦品种籽粒的清蛋白+球蛋白、醇溶蛋白和谷蛋白,高分子量谷蛋白亚基(HMW-GS)、低分子量谷蛋白亚基(LMW-GS)进行了分离量化,并根据谷蛋白含量、贮藏蛋白含量及面团稳定时间3个指标对其聚类分析。结果表明,不同小麦品种蛋白质各组分含量存在差异,其中贮藏蛋白的含量是决定蛋白质总含量的主要因素。HMW-GS含量、LMW-GS含量、谷蛋白总含量均与面团形成时间、稳定时间及沉降值呈极显著正相关;HMW-GS含量与LMW-GS含量的比值(HMW/LMW)与面团形成时间和稳定时间呈极显著正相关;醇溶蛋白含量与谷蛋白含量的比值(Gli/Glu)与面团稳定时间呈显著负相关,醇溶蛋白含量与HMW-GS含量的比值(Gli/HMW-GS)与面团形成时间和稳定时间均呈极显著负相关。籽粒中具有较高的贮藏蛋白含量、HMW-GS含量、LMW-GS含量和HMW/LMW及较低的Gli/Glu有利于提高强筋小麦的加工品质。 相似文献
5.
Ca/GA对渗透胁迫下小麦种子萌发中蛋白质变化的调节 总被引:5,自引:0,他引:5
小麦萌发时,种子胚乳总蛋白含量逐渐下降,其中由于提供萌发所需氮化物球蛋白,醇溶蛋白和谷蛋白逐渐减少,合成数种启动种子萌发所需酶蛋白等的清蛋白逐渐增加,胚中蛋白质各组分随种子萌发过程垃逐渐增加,渗透胁迫下,萌发种子胚乳清蛋白和胚中蛋白质中组分的增加,以及胚乳中球蛋白,醇溶蛋白和谷蛋白的降解均受抑制,因此,种子萌发与其基因蛋白质密切相关,Ca处理在萌发后期才对种子蛋白质变化起促进作用,GA和Ca+GA 相似文献
6.
7.
8.
研究了5种玉米胚乳突变基因(o_2,su_1,sh_2,bt_2,wx)及其互作对籽粒百粒重、蛋白质含量及蛋白质组分(清蛋白、球蛋白、醇溶蛋白、谷蛋白)的影响,并观察了蛋白质组分在突变体籽粒发育过程中的变化。结果表明,与正常型相比,o_2,su_1,sh_2,bt_2单突变体和各种双突变体均不同程度降低百粒重和增加蛋白质含量;蛋白质组分中,醇溶蛋白含量严重降低,其它组分含量相应增加。籽粒发育过程中突变体蛋白质组分的变化是:盐溶蛋白(清蛋白和球蛋白)早期含量较高,后期持续下降;醇溶蛋白早期含量较低,后期上升缓慢;谷蛋白后期增加量较多。研究分析了各成份之间的相互关系。 相似文献
9.
10.
小麦籽粒蛋白质组分的氮素效应研究 总被引:2,自引:0,他引:2
1992年1993年两年对三个典型小麦品种,采用生产上四个关键施肥时期施氮,研究了各品种的蛋白质含量及其组分含量的变化。结果表明,随施肥时期推迟,各品种蛋白质含量呈递增趋势,但增加程度不同,各品种组合组分含量的变化,随施氮时期延后,清蛋白和谷蛋白叶进增趋势,但球蛋白和醇溶蛋白以拔节期施含量最高。品种之间在绝对含量上明显不同。 相似文献
11.
12.
13.
绵阳系列小麦籽粒蛋白质含量及其组分与SDS-沉降值关系的研究 总被引:1,自引:0,他引:1
以14个绵阳系列小麦品种为材料,研究不同品种籽粒蛋白质含量、蛋白组分和SDS-沉降值的变化规律,以及籽粒蛋白质含量及其组分与SDS-沉降值的关系,为绵阳系列小麦品种的选育提供理论依据。研究结果表明,不同小麦品种籽粒蛋白质含量不同,变幅为7.30%~13.09%,多数品种属于低蛋白质含量类型。多数品种的SDS-沉降值分布在20~30 mL范围内。不同品种籽粒蛋白组分各异。籽粒蛋白质含量、贮藏蛋白含量、谷蛋白和醇溶蛋白含量都与SDS-沉淀值成极显著的正相关关系。高的籽粒蛋白质含量和谷蛋白与醇溶蛋白含量是绵阳系列小麦品种获得较好烘烤品质的前提。 相似文献
14.
芸豆种子蛋白组分及其在种子萌发过程中的变化 总被引:2,自引:0,他引:2
以4个具有明显差异的芸豆品种为材料,采用SDS-PAGE方法研究芸豆种子萌发过程中水溶、盐溶和总蛋白组分变化及种子胚和子叶变化过程中蛋白组分变化.试验结果表明,芸豆种子的子叶、胚含有丰富的蛋白亚基,其中,同一品种子叶和胚贮藏蛋白亚基差异明显,子叶、胚的水溶蛋白、盐溶蛋白和总蛋白相差不大、条带丰富;不同品种之间条带存在差异;在发芽过程中,高分子量蛋白亚基的降解速度快于低分子量蛋白亚基,子叶亚基的降解速度明显慢于胚的亚基降解速度;不同品种间子叶、胚条带差异明显,种子活力高的品种(Y05,Y06)降解速度快于种子活力低的品种(Y09,Y1 1),而蛋白含量高的品种(Y1 1,Y05)与蛋白含量低的品种(Y06,Y09)差异不明显.研究结果为芸豆品种鉴定、品种改良、优质栽培及发芽机理提供理论依据. 相似文献
15.
Biochemical analyses of seed storage proteins of Phaseolus coccineus have been carried out to identify seventeen different cultivars. The electrophoretic patterns in native polyacrylamide gel electrophoresis (PAGE) and denaturing conditions (SDS-PAGE); evidenced qualitative and quantitative differences for the three major protein components: legumin, vicilin and phytohaemagglutinin (PHA). The results were confirmed by isoelectrofocusing (IEF) analyses. Erythroagglutination tests showed the presence of high agglutinating activity particularly in cultivars with low vicilin content. The experimental results allow one to distinguish all the cultivars by their electrophoretic spectra and agglutinating activities. 相似文献
16.
Wheat seed storage protein fingerprint is used to determine the gluten protein pattern in studies aimed at improving flour
quality. Wild wheat with high seed protein content is used extensively in wheat breeding programs. Although the wild wheat
growth and protein content may be influenced by environmental conditions, the gluten-protein pattern is generally considered
as indicative of a genotype, without the superimposition of environmental influences. The effects of soil type, habitat, and
deficiencies of N, P, K and S on seed storage protein composition were examined in nine accessions of wild wheat (Triticum
turgidum var. dicoccoides) and three varieties (two T. aestivum and one T. durum). Soil from ten natural habitats of the wild
wheat that had not previously received any fertilizers or manures was sampled and used to grow wheat in a greenhouse. Seed
storage protein composition was characterized by SDS-PAGE. Although deficiencies in soil nutrient caused variations in the
seed storage proteins, the genotype was the main factor determining the seed storage protein composition. Seed storage protein
composition of genotypes varied when grown under different mineral nutrient conditions. Only one genotype was stable showing
almost identical protein patterns under all growing conditions studied without any qualitative change in fingerprint pattern.
In the other genotypes, as well as the cultivars, the seed storage protein was affected at least to some extent by the soil.
The ‘soil effect’ is summarized in terms of three main quantitative changes in the seeds: 1 – the relative amounts of the
high-molecular-weight proteins; 2 – the relative amounts of proteins in the range of 45 and 65 kD; 3 – the percentage distribution
of the HMW glutenin and other groups of seed storage proteins. The soild induced also qualitative differences in the composition
of seed storage proteins, mostly in those of 45–65 kD. These differences were observed whenever a deficiency of S, N, P, K
or Mg was identified. Therefore, in breeding programs that use seed storage protein fingerprints of wild wheat germplasms
should be exercise caution when the germplasms selected from wild habitats.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
17.
Identification of lily cultivars using isoelectric focusing of proteins from bulb scales and tissue culture bulblets 总被引:2,自引:0,他引:2
An efficient procedure is described for cultivar identification in lily, based on polymorphism in bulb scale proteins analysed by isoelectric focusing (IEF). Seventy (84%) out of 83 cultivars from which in vivo bulbs were analysed showed a unique banding pattern. Analysis of in vitro bulblets from 62 commercial cultivars resulted in 47 (76%) unique banding patterns. Cultivars with identical protein patterns always belonged to the same cultivars classification group (i.e., Asiatic hybrids, Oriental hybrids or Lilium longiflorum). Protein bands characteristic for the cultivar groups have been found. The protein patterns appeared to be very consistent and were not affected by the soil-type on which the bulbs were grown, long-term bulb storage, different protein sample storage methods, in vitro growing conditions, or in vitro bulblet storage. However, in six out of 10 cultivars from which in vivo bulbs and in vitro bulblets were analysed, protein patterns from in vivo bulbs consisted of a greater number of, and/or more intensely stained bands than those from in vitro bulblets of the same cultivar. The protein patterns appeared to be unsuitable markers for selection of reference cultivars for distinctness, uniformity and stability (DUS) testing as no relation was found between morphological characters and protein patterns. Cultivars with identical or very similar protein patterns were generally clearly distinct on the basis of morphological characters. 相似文献
18.
为了探寻套作甘薯高产优质的氮肥运筹方式, 以甘薯套作及单作为主区, 定量氮肥全部基施、分2期和分3期运筹为副区, 于2015—2016两年度探讨了不同处理对2个甘薯品种(渝紫7号和万薯10号)块根产量、品质及氮肥利用效率的影响。结果表明, 2个品种无论单作或套作, 定量氮肥分2期或分3期运筹显著提高甘薯块根产量、单薯重、可溶性蛋白含量、可溶性糖含量、氮肥表观利用率和氮肥偏生产力; 套作中定量氮肥不同运筹方式对2个甘薯品种商品薯率影响不显著, 但单作中分3期运筹时最高; 万薯10号块根β-胡萝卜素含量以定量氮肥分3期运筹最高, 渝紫7号块根花青素含量以分2期和3期运筹最高, 2个品种块根淀粉含量以氮肥全部基施最高。套作降低了除甘薯块根可溶性糖含量外的其他营养品质以及产量和氮肥利用效率, 但套作定量氮肥分2期或3期运筹, 可使这些指标达到或优于单作氮肥全部基施水平。为提高块根淀粉含量, 定量的氮肥宜采用全部基施, 为同时优化其他营养品质、提高甘薯产量和氮肥利用效率, 定量的氮肥宜采用分2期或分3期运筹。 相似文献