共查询到19条相似文献，搜索用时 171 毫秒
1.
干旱对小麦幼苗SOD活性和CaM水平的影响 总被引：9，自引：1，他引：8
本研究结果表明，干旱引直小麦幼苗中超氧化物歧化酶（ＳＯＤ）活性和丙二醛（ＭＤＡ）含量增高，钙调素（ＣａＭ）水平下降。萎蔫的幼苗复水４天后，ＳＯＤ活性和ＭＤＡ含量又下降，恢复至对照水平，而ＣａＭ含量急剧上升且高于对照。研究还表明，ＳＯＤ可能不ＣａＭ的调节。财时对ＳＯＤ活力测定计算方法也进行了探讨。 相似文献
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小麦胚乳贮藏蛋白高分子量谷蛋白亚基1Dy10单克隆抗体在品质育种… 总被引：3，自引：0，他引：3
本文研究利用高分子量谷蛋白亚基１Ｄｙ１０特异性单克隆抗体测定小麦胚乳贮藏蛋白中是否含有优质亚基１Ｄｘ５＋１Ｄｙ１０的免疫化学测定条件，建立适宜的间接ＥＬＩＳＡ测定法。结果表明：蛋白质提取剂种类对籽粒贮藏蛋白提取效率及１Ｄｘ５＋１Ｄｙ１０与１Ｄｘ２＋１Ｄｙ１２亚基的识别起决定作用。其中以１０ｍＭ ＨＣｌ较理想，还原剂ＤＴＴ能提高１Ｄｘ５＋１Ｄｙ１０与１Ｄｘ２＋１Ｄｙ１２亚基的识别能力，蛋白提取时间、 相似文献
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水分胁迫与玉米ＳＯＤ同工酶ＷａｔｅｒＳｔｒｅｓａｎｄＳＯＤＩｓｏｅｎｚｙｍｅｉｎＭａｉｚｅＳｅｄｌｉｎｇｓ许多研究表明，植物的膜保护酶系统与植物的抗性有密切的关系，其中的ＳＯＤ酶作为清除活性氧的第一个关键酶尤为重要。但关于ＳＯＤ同工酶与玉米水分胁迫之... 相似文献
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黄瓜组织中几种酶活性与其对霜霉病抗性的关系 总被引：19，自引：3，他引：19
对抗，感霜霉病两类黄瓜品种的萌动种子，子叶，不同叶痊直叶及定位叶片感染霜霉病菌后叶内超氧化物歧化酶（ＳＯＤ），多酚氧化酶（ＰＰＯ）和过氧化酶（ＰＯＤ）活性的测定结果表明：抗病品种比感染品种萌动种子中的ＳＯＤ活性高５４．１５％，ＰＰＯ活性高６２．１４％；子叶中的ＳＯＤ活性高３５．５１％，ＰＰＯ活性高４０．１０％，ＰＯＤ活性高７４．４７％；不同叶位真叶内，除ＳＯＤ活性为感病品种高于抗病品种１３１．．５ 相似文献
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棉花不同生育期SOD同工酶与品种抗黄萎病性相关性的研究 总被引：8，自引：0，他引：8
凝胶电泳测定不同棉花品种子叶期、４叶期、蕾期、铃期、吐絮期等５个不同生育期的叶片内ＳＯＤ同工酶,结果其谱带数目相应为４、８、８、４、３,随着棉花的生育进程,ＳＯＤ同工酶活性由弱一强一弱。在棉花生长前期子叶期、４叶期,抗、感黄萎病品种之间,接菌与不接菌棉株间,ＳＯＤ同工酶谱活性差异不明显;在蕾期,虽然品种间的ＳＯＤ同工酶谱活性差异不明显,但接菌的棉株Ｅ１、Ｅ５、Ｅ６三条酶带活性强于不接菌棉株,Ｅ３活性则相反;在铃期,抗、耐品种较感病品种Ｅ２谱带活性强,接菌棉株较不接菌棉株增加一条Ｅ３ｂ谱带。感病品种泗棉２号上显症棉株叶片体内ＳＯＤ同工酶较无病症叶增加一条Ｅ４酶带;不同病级的叶片内,ＳＯＤ同工酶的活性差异不大。至吐絮期,不同品种棉株及显症叶与无病叶间的ＳＯＤ酶活性又趋相同。 相似文献
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对小麦Ｔ型和Ｐ型细胞质雄性不育系及保持系花药中ＳＯＤ活性、ＳＯＤ同工酶及脂质过氧化作用的研究结果表明，单核期不育系花药中的ＳＯＤ活性比保持系略低，ＳＯＤ同工酶带数与保持系相同。到二核期和三核期不育系花药中缺少一条ＳＯＤ同工酶带，ＳＯＤ活性也比保持系明显降低。不育系花药在三个发育时期的ＭＤＡ含量均明显高于保持系。同时发现在三核期不育系旗叶减少一条ＳＯＤ同工酶带。体内活性氧清除能力降低及脂质过氧化用加 相似文献
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后期高温对冬小麦根系及地上部请老的影响 总被引：27，自引：4，他引：27
本文研究了后期高温处理对冬小麦根系及地上部活性氧代谢及生理特性的影响,结果表明,高温处理使小麦根系及叶片的膜脂过氧化产物－ＭＤＡ含量增加,质膜相对透性增大,在高温处理过程中,根系和叶片ＳＯＤ及ＰＯＤ酶活生的变化均表现为先升高而后下降的趋势,但叶片ＳＯＤ和ＰＯＤ活性下降较早,其下降幅度大于根系,表明地上部受高温影响较大,小麦根系及叶片的膜脂过氧化水平与ＳＯＤ和ＰＯＤ酶活性的变化有密切关系,随叶片ＳＯ 相似文献
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水杨酸预处理对提高黄瓜幼苗耐低温能力的影响 总被引：18，自引：0，他引：18
观察了经水杨酸（ＳＡ）预处理的黄瓜幼苗对低温胁迫的反应,结果表明,ＳＡ预处理２明显增强了黄瓜幼苗的耐低温能力。萎蔫率、死亡率明显下降,幼苗的ＭＤＡ含量略有增加,Ｏ２^-含量下降;ＰＯＤ、ＳＯＤ活性上升,ＣＡＴ活性下降。黄瓜幼苗在低温胁迫过程中,经ＳＡ预处理的幼苗较未预处理幼苗ＭＤＡ含量增加减少,Ｏ２^含量上升延迟,ＰＯＤ、ＣＡＴ、ＳＯＤ活性均比未进行ＳＡ预处理的幼苗活性高。试验表明,保持较高的膜保护酶活性是ＳＡ提高黄瓜幼苗耐温能力的基础。 相似文献
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同一面包小麦品种洪烤品质变化规律的研究 总被引：8，自引：0，他引：8
对于同一面包用小麦品种的蛋白质含量极为不同的样品、面包体积与蛋白质含量,沉降值,ｆａｒｉｎｏｇｒａｍ（粉质图）吸水率和ｍｉｘｏｇｒａｍ（和面图）峰高等呈密切直线相关,与ｆａｒｉｎｏｇｒａｍ形成时间及稳定时间等呈曲线相关;与ｍｉｘｏｇｒａｍ和面时间无明显相关。研究结果认为;在面包用小麦品种开发种植中,以品种真实性鉴定为基础,用籽粒蛋白质含量,ＳＤＳ沉降值等可进行小麦品质的检测与分级;全玻璃质颗粒率可 相似文献
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在一对面包小麦杂交后代中Glu—B1控制的麦谷蛋白亚基17 18对烘烤品质的影响 总被引：4，自引：0，他引：4
将两个优质面包小麦品种安农8455(含Glu-Bl控制的7 8亚基)和Yecora Rojo(含Glu-Bl控制的17 18亚基)进行杂交,测定了其F_3代重组株系的高分子量麦谷蛋白亚基组成、SDS沉降值、伯尔辛克值、蛋白质含量和籽粒产量以及收获指数。利用方差分析、协方差分析和回归分析说明了,17 18亚基对面包品质的作用明显优于7 8亚基,两者的品质差异随着蛋白质含量的增加而增大。文中讨论了17 18亚基在培育较高面包品质潜力的小麦品种中的利用价值。 相似文献
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Grain Yield and Quality of Durum Wheat Landraces in a Dry Mediterranean Region of Northern Syria 总被引：1，自引：0，他引：1
Twenty-two durum wheat landraces of various origins were evaluated for performance and stability of grain yield, protein content and gluten strength (SDS sedimentation volume) at two sites of Northern Syria situated in the drought-prone part of the local durum wheat belt. Yield was recorded in three seasons, while protein content and SDS volume were assessed in two seasons only. A high “entry X environment” interaction was observed for all traits, which was significantly attributable to heterogeneity of entry regressions on the environmental mean for grain yield only. Compared to the recently-bred, widely-grown variety ‘Sham I’, some landraces showed somewhat similar yield responses, whereas others proved more stable without being significantly lower yielding. Significant variation was found for SDS volume, though only few of the best-ranking landraces for this trait also possessed an acceptable yield level. The entries did not significantly differ for protein content. The broad sense heritability estimates obtained for grain yield (0.59) and SDS volume (0.89) highlighted the interest in some of the landraces examined for improving grain yield and quality in the region. 相似文献
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摘 要：为了从分子水平对款冬种质资源进行鉴定和遗传多样性分析,分别采用SDS法、CTAB法、改良SDS法和改良CTAB法提取款冬叶片基因组DNA,比较不同方法的提取效果,并用改良CTAB法提取的DNA进行ISSR-PCR扩增体系摸索,建立优化的ISSR-PCR反应体系。结果显示：改良SDS法和改良CTAB法都可以提取出高质量的DNA,最优的ISSR-PCR反应条件为: 20μl反应体系中含DNA模板约20ng,Taq 酶1.0 U,Mg2+ 2.00 mmol/L,dNTPs 0.20 mmol/L,引物0.6 μmol/L,1×PCR缓冲液。 相似文献
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盾叶薯蓣基因组DNA的提取及RAPD鉴定研究 总被引：1，自引：1，他引：0
盾叶薯蓣是中国特有的植物,是甾体激素的重要来源。试验采用CTABⅠ,CTABⅡ,SDSⅠ和SDSⅡ等方法对盾叶薯蓣基因组DNA的提取进行了研究,并且结合核酸测定仪、琼脂糖凝胶电泳法以及RAPD鉴定等方法对DNA质量进行了鉴定。试验结果表明,采用CTABⅠ法可提取高质量DNA供分子标记使用。 相似文献
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The effect of indirect tests for grain quality on the grain yield and industrial quality of bread wheat 总被引：6，自引：0，他引：6
The objective of this study was to examine the effect of selection using three indirect tests for grain quality on grain yield and dough, and baking properties, measured as alveograph strength, alveograph tenacity/extensibility ratio and loaf volume. The three tests were flour protein content, flour sedimentation and high molecular weight glutenin subunits. Of the indirect tests used for grain quality, sodium dodecyl sulphate (SDS)‐sedimentation allowed the highest intensity of selection for a combined trait index of the target grain quality and grain yield characteristics. The top 48% of the material could be retained on the basis of SDS‐sedimentation, resulting in retention of atleast two‐thirds of the top 10% of genotypes for the combined trait index. Flour protein percentage, a weighted high molecular weight glutenin index and an index combining all the indirect tests—flour protein, SDS‐sedimentation and high molecular weight glutenins—gave selection intensities of 61%, 64% and 55%, respectively, for the combined trait index. If the objective of selection is dough strength alone, then a weighted index of all indirect traits (flour protein, SDS‐sedimentation and high molecular weight glutenins) provided the highest selection intensity (26%). Other selection intensities for individual target traits were 24% for the prediction of loaf volume from flour protein, 40% for the prediction of tenacity/ extensibility ratio using SDS‐sedimentation and 68% for the prediction of grain yield using SDS‐sedimentation. 相似文献
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Three near‐isogenic lines (NILs) of wheat involving Glu‐B1 and Glu‐D1 alleles were used to study the genetic contribution of high molecular weight glutenin subunits (HMW‐GS) to gluten strength. The HMW‐GS composition of each NILs was determined by SDS‐PAGE. No significant differences were found in grain protein contents among the NILs. Gluten strength and dough‐mixing properties were measured by the Farinograph, the Extensograph, and SDS‐sedimentation (SDS‐SE). Results indicated that line 2, containing the Glu‐1B 14 + 15 and Glu‐1D 5 + 10 combination of subunits, had higher values for flour quality, dough rheological parameters, and bread‐baking quality when compared with lines 8 and 13. Line 8, containing Glu‐1B 7 + 9 and Glu‐1D 5 + 10, was better than line 13 with the Glu‐1B 14 + 15 and Glu‐1D 10 combination. Some major parameters appeared significantly different. The presence of Glu‐1B 14 + 15 was associated with higher dough strength based on SDS‐SE volume and several rheological parameters when compared with Glu‐1B 7 + 9. Lines with subunit 10 at Glu‐D1 performed significantly worse than those with 5 + 10 in gluten index, SDS‐SE volume, Farinograph stability time, Extensograph area and bread‐baking quality. 相似文献
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树莓基因组DNA的提取及ISSR反应体系的正交优化 总被引：2，自引：1，他引：1
摘 要：以树莓优良野生种质插田泡（Rubus coreanus）为材料,比较了SDS法、CTAB法和改良CTAB法提取树莓基因组DNA的效果,结果发现三种方法均能提取到树莓DNA,但改良CTAB法优于CTAB法和SDS法,其所得的DNA质量最好,杂质最少。通过正交试验设计,对Taq酶,primer,dNTP和DNA用量进行了筛选,建立了树莓ISSR技术最优反应体系,即25 μl反应体系中含有1×PCR Buffer,2 mmol/L Mg2+,1.5 U Taq酶,0.2 μmol/L primer,0.4 mmol/L dNTP和20 ng DNA。采用引物UBC835和UBC873分别对10个树莓品种和8个树莓野生资源进行检验发现,该体系工作效果良好。 相似文献