共查询到19条相似文献,搜索用时 78 毫秒
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多花水仙若干品种类型的亲缘关系与进化研究——I.POD同工酶分析 总被引:4,自引:0,他引:4
以7个水仙品种为材料,用垂直平板聚丙烯酰胺凝胶电泳,分析在同一生长时期的过氧化物酶同工酶。结果表明,酶谱中不同品种的酶带分布有区别。但Ⅰ-1、Ⅰ-2和Ⅲ-3相似,Ⅱ-1和Ⅱ-2相似,平潭水仙和漳州水仙相似。 相似文献
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外源ABA对低温胁迫水稻幼苗酯酶同工酶的影响 总被引:2,自引:0,他引:2
研究外源ABA对低温胁迫的水稻幼苗酯酶同工酶的影响。结果表明,水稻幼苗经7℃-10℃低温处理6d,长势明显不降,与其相应的酯酶同工酶也发生变化。外施ABA提高了水稻幼苗的抗寒能力,同样在酯酶同工酶酶谱上也有相应改变。 相似文献
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外源ABA对低温胁迫水稻过氧化物酶同工酶的影响 总被引:10,自引:0,他引:10
采用聚丙烯酰胺垂直板电泳法,就外源ABA对低温胁迫下水稻幼苗过氧化物酶(POD)同工酶的影响进行了研究。结果表明,低温胁迫下,水稻幼苗长势明显下降,与其相应的过氧化物酶同工酶也发生了变化,外施ABA(10^-5mol/L)提高了水稻幼苗的抗寒能力,其相应的过氧化物酶同工酶却表现为部分酶活性增强,说明:(1)过氧化物同工酶的变化将引起植物对低温的抗性反应;(2)外源ABA引起自由基清除酶(如POD)活力的升高,是植物抗寒性增强的原因之一。 相似文献
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该文采用聚丙烯酰胺凝胶圆盘电泳技术,对斑海豹心肌、肝脏、胰腺、肾组织和骨骼肌的LDH同工酶谱进行了分析。结果表明斑海豹不同组织LDH同工酶的区带数目、相对活性和亚基含量均具组织特异性,并且计和胰腺中不存在LDH1。 相似文献
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刘红燕 《中国野生植物资源》2013,32(2):26-27
目的:建立鬼针草6个品种过氧化物酶同工酶(POD)电泳指纹图谱,探讨鬼针草种内变异规律.方法:聚丙烯酰胺凝胶电泳分析.结果:鬼针草6个品种过氧化物酶同工酶PAGE指纹图谱差异显著.结论:聚丙烯酰胺凝胶同工酶电泳图谱可用于鉴别鬼针草6个种质. 相似文献
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聚乙二醇胁迫下的番茄幼苗内ABA、JA和多胺含量以及多胺氧化酶活性的变化 总被引:1,自引:0,他引:1
聚乙二醇模拟的干旱胁迫下,2个品种番茄幼苗根和叶中脱落酸(ABA)和茉莉酸(JA)含量均迅速积累,叶中ABA累积比根中滞后;游离态亚精胺(fSpd)、精胺(fspm)、腐胺(fPut)含量和多胺氧化酶(PAO)活性均先上升,12 h时达到峰值后下降,耐旱性强的品种'毛粉802'幼苗根和叶中积累ABA、JA和spd、Spm的能力明显强于耐旱性弱的品种'皇冠'.'皇冠'的PAO活性提高程度大于'毛粉802'.番茄根和叶中多胺含量和PAO活性呈显著正相关.内源多胺的积累诱导ABA和JA含量的升高,从而导致番茄幼苗的耐旱性增强. 相似文献
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芦笋在PEG模拟干旱条件下的生理生化变化 总被引:3,自引:0,他引:3
用聚乙二醇(PEG-6000)胁迫处理芦笋幼苗,检测了幼苗的渗透调解物质含量、生物膜透性、抗氧化特性等指标。结果表明:脯氨酸、可溶性糖含量随着处理时间的延长显著增加,且以20%的PEG浓度处理增加最明显;SOD、POD、CAT活性在PEG处理后明显增强;相对电导率随着处理浓度的增大和时间的延长而增大;MDA含量随着处理时间的延长明显增加,且以10%和20%浓度处理增加显著。由此表明,芦笋在干旱胁迫下通过增加渗透调解物质含量,降低水势来提高其抗旱能力;通过增强抗氧化酶活性,提高抗氧化能力,来减轻干旱胁迫伤害。 相似文献
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Osmotic stress can endanger the survival of plants. To investigate the mechanisms of how plants respond to osmotic stress, rice protein profiles from mannitol-treated plants, were monitored using a proteomics approach. Two-week-old rice seedlings were treated with 400mM mannitol for 48h. After separation of proteins from the basal part of leaf sheaths by two-dimensional polyacrylamide gel electrophoresis, 327 proteins were detected. The levels of 12 proteins increased and the levels of three proteins decreased with increasing concentration or duration, of mannitol treatment. Levels of a heat shock protein and a dnaK-type molecular chaperone were reduced under osmotic, cold, salt and drought stresses, and ABA treatment, whereas a 26S proteasome regulatory subunit was found to be responsive only to osmotic stress. Furthermore, proteins whose accumulation was sensitive to osmotic stress are present in an osmotic-tolerant cultivar. These results indicate that specific proteins expressed in the basal part of rice leaf sheaths show a coordinated response to cope with osmotic stress. 相似文献
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棉花幼铃脱落过程中IAA、ABA、MDA含量及SOD、POD活性的变化 总被引:3,自引:0,他引:3
经去柱头阻止受精或去叶处理即将脱落的棉幼铃,随脱落进程加快,其内在生理变化均伴随膜脂过氧化加剧、ABA含量增加、POD活性提高,在脱落前达到最大值,而正常幼铃的变化平稳;IAA含量则逐渐减少,并明显低于正常幼铃的;SOD活性在开花后的前3天呈上升趋势,并明显高于正常铃的,以后又逐渐下降。超氧自由基(O2)的积累及其引起的膜脂过氧化伤害可能是影响幼铃内源激素平衡,导致幼铃脱落的重要原因之一。 相似文献
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菜粉蝶不同发育期酯酶同工酶的比较研究 总被引:9,自引:1,他引:9
利用垂直板型聚丙烯酰胺凝胶电泳法研究菜粉蝶Pieris rapae不同发育期的酯酶同工酶,并探讨在个体发育过程中的作用。 相似文献
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Localization of Streptomyces stanfordii endonuclease I (SstI) cleavage sites on genomes of human adenovirus types two and five. 总被引:3,自引:0,他引:3
The SstI restriction endonuclease cleaves adenovirus 2 and 5 (Ad2 and Ad5) DNAs into 15 and 16 fragments, respectively. Cleavage sites were positioned with respect to several other cuts made by seven restriction endonucleases. There are relatively few SstI sites in the middle portion and in the right side of the genome, while several are located within the 16.5--20% region which contains "leader sequences". 相似文献
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水分胁迫下山黧豆中ABA及ODAP的积累研究 总被引:4,自引:0,他引:4
用PEG、PEG+ABA、ABA分别处理15d龄的山黧豆幼苗,取其叶片为实验材料,测定内源ABA、ODAP、MDA和H2O2含量以及几种抗氧化酶活性,结果表明,与对照相比处理材料叶片中ABA和ODAP含量显著增加;外源ABA的加入降低了PEG胁迫引起的MDA和H2O2含量的增加,延缓了PEG胁迫引起的CAT活性的衰减,提高了GR活性.用外源ABA长时间处理山黧豆,发现叶片中ABA含量显著增加,随后出现ODAP的积累;ABA处理初期(0~3d)对叶片中活性氧代谢影响不大,随着ABA处理时间的延长(7~15d),可引起叶片中SOD、POD、CAT、GR活性的降低,MDA、H2O2含量的增加,表明ABA确实可促进ODAP的积累. 相似文献
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Stocks derived from 10 different primary isolates of T. vivax were subjected to isoenzyme analysis for 34 enzymes by both isoelectric focusing in agarose and electrophoresis in starch gel. Trypanosomes were measured and their morphology examined for comparison with the biochemical data. Thirteen enzymes (14 zymograms) were selected to construct isoenzyme profiles. Nine different zymodemes were identified and only two stocks were identical. Both rodent infectivity and the production of the haemorrhagic syndrome could be correlated with the isoenzyme profiles. 相似文献