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三唑酮对绿豆幼苗叶片衰老的延缓作用 总被引:26,自引:0,他引:26
三唑酮处理可提高离体绿豆(PhaseolusradiatusL.)幼苗叶片叶绿素和蛋白质含量。叶片衰老过程中超氧物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)和抗坏血酸过氧化物酶(AsAPOD)活性及抗坏血酸(AsA)和还原型谷胱甘肽(GSH)含量降低。20mg/L三唑酮可提高POD、AsAPOD活性和AsA、GSH含量,对SOD、CAT活性无影响。丙二醛(MDA)含量在叶片衰老过程中提高,并与POD、AsAPOD活性和AsA、GSH含量呈显著负相关,三唑酮可降低MDA含量。表明三唑酮有提高植物对膜脂过氧化作用的保护能力,延缓叶片的衰老作用。 相似文献
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三唑酮对黄瓜子叶抗氧化酶活力的影响 总被引:6,自引:2,他引:4
黄瓜子叶衰老过程中超氧物歧化酶(SOD)、过氧化氢酶(CAT)和抗坏血酸-过氧化物酶(ASA-POD)活性降低,而过氧化物酶(POD)活性升高。20mg/L三唑酮右明显提高SOD,ASA-POD,CAT活性,抑制POD活性升高。膜脂过氧化产物丙二醛(MDA)含量在叶片衰老过程中提高,三唑酮可降低MDA含量。表明三唑酮减轻脂氧化程度,延缓了叶片的衰老。 相似文献
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为了研究水分胁迫下山黧豆(Lathyrus sativus L.)叶片中多胺代谢与β-N-草酰-L-α,β-二氨基丙酸(ODAP)积累的相关关系,利用聚乙二醇(PEG)对山黧豆幼苗进行水分胁迫处理,同时加入腐胺(Put),α-二氟甲基精氨酸(DFMA)和Put+DFMA。实验结果表明,随PEG处理时间的延长,山黧豆幼苗叶片中Put、亚精胺(Spd)和精胺(Spm)含量逐渐增加,特别是Spm含量增加 相似文献
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红豆杉组织培养中SINENXANS高产细胞系Ts19的几种同工酶动态比?… 总被引:2,自引:0,他引:2
对从中国红豆杉的茎来源的愈伤组织经筛选而得的sinenxans高产细胞系Ts19的过氧化物酶(POD)、酯酶(EST)、细胞色素氧化酶(COD)、淀粉酶(AML)、多酚氧化酶(PPO)及超氧化物歧化酶(SOD)的同工酶,可溶性蛋白的含量及电泳谱带、超氧化物歧化酶、多酚氧化酶和苯丙氨酸解氨酶(PAL)的活性作了比较研究。并与培养过程中sinenxans含量的动态变化相比较,探索了这几种同工酶的酶谱和 相似文献
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有害藻类及其微生物防治的基础:藻菌关系的研究动态 总被引:74,自引:4,他引:74
有害藻类及其微生物防治的基础──藻菌关系的研究动态赵以军,刘永定(中国科学院水生生物研究所,武汉,430072)关键词藻类,细菌,病毒,真菌POSSIBLEMICROBIALCONTROLONTHEADVERSEIMPACTSOFALGAE-CURR... 相似文献
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本实验采用超声破碎、TritonX-100处理和超速离心技术提取了鼠伤寒沙门氏菌(Salmonellatyhimurium,STM)的外膜蛋白(Outermembraneproteins,OMPs),其中脂多糖(LPS)的含量约为5%。OMPs经SDS—PAGE显示10余条蛋白带。对OMPs诱发BALB/C小鼠产生典型的迟发型变态反应(DTH)进行了检测。经腹腔免疫的BALB/C小鼠用500LD50鼠伤寒沙门氏菌(50115)攻击,100%可得到保护;用500LD50伤寒杆菌(E686)攻击 相似文献
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中华姬鼠种群生态的初步分析THEPRELIMINARYANALYSISONTHEPOPULATIONECOLOGYOFCHINESEFIELDMOUSE(APODEMUSDRACO)KeyWordsChineseFieldMouse(Apodemus... 相似文献
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拟南芥:植物分子生物学研究的模式物种 总被引:7,自引:0,他引:7
拟南芥:植物分子生物学研究的模式物种陈璋(福建省花卉研究中心福州350002)ARABIDOPSISTHALIANAASAMODELSPECIESFORPLANTMOLECULARBIOLOGYSTUDIES¥ChenZhang(FujianProu... 相似文献
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三种钠尿肽抑制大鼠肺动脉平滑肌细胞增殖效应的比较 总被引:5,自引:2,他引:5
本文比较了心房钠尿肽(ANP)、C-型钠尿肽(CNP)、血管钠肽(VNP)抑制肺动脉平滑肌细胞(PASMCs)增殖的效应。用蛋白激酶C激动剂佛波酯(PMA)刺激体外培养大鼠PASMCs的增殖,以总蛋白含量和MTT比色OD值为指标,观察三种钠尿肽对PMA刺激大鼠PASMCs增殖的影响。结果表明,PMA(10^-9-10^-7mol/L)显著升高(P<0.05)PASMCs的总蛋白含量和MTTOD值, 相似文献
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In experiments on Black Sea skates (Raja clavata), the potential of the receptor epithelium of the ampullae of Lorenzini and spike activity of single nerve fibers connected to them were investigated during electrical and temperature stimulation. Usually the potential within the canal was between 0 and –2 mV, and the input resistance of the ampulla 250–400 k. Heating of the region of the receptor epithelium was accompanied by a negative wave of potential, an increase in input resistance, and inhibition of spike activity. With worsening of the animal's condition the transepithelial potential became positive (up to +10 mV) but the input resistance of the ampulla during stimulation with a positive current was nonlinear in some cases: a regenerative spike of positive polarity appeared in the channel. During heating, the spike response was sometimes reversed in sign. It is suggested that fluctuations of the transepithelial potential and spike responses to temperature stimulation reflect changes in the potential difference on the basal membrane of the receptor cells, which is described by a relationship of the Nernst's or Goldman's equation type.I. P. Pavlov Institute of Physiology, Academy of Sciences of the USSR, Leningrad. I. M. Sechenov, Institute of Evolutionary Physiology and Biochemistry, Academy of Sciences of the USSR, Leningrad. Pacific Institute of Oceanology, Far Eastern Scientific Center, Academy of Sciences of the USSR, Vladivostok. Translated from Neirofiziologiya, Vol. 12, No. 1, pp. 67–74, January–February, 1980. 相似文献
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N. P. Vesselkin Yu. V. Natochin 《Journal of Evolutionary Biochemistry and Physiology》2010,46(6):592-603
Evolution of living organisms is closely connected with evolution of structure of the system of regulations and its mechanisms.
The functional ground of regulations is chemical signalization. As early as in unicellular organisms there is a set of signal
mechanisms providing their life activity and orientation in space and time. Subsequent evolution of ways of chemical signalization
followed the way of development of delivery pathways of chemical signal and development of mechanisms of its regulation. The
mechanism of chemical regulation of the signal interaction is discussed by the example of the specialized system of transduction
of signal from neuron to neuron, of effect of hormone on the epithelial cell and modulation of this effect. These mechanisms
are considered as the most important ways of the fine and precise adaptation of chemical signalization underlying functioning
of physiological systems and organs of the living organism 相似文献
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