三唑酮对绿豆幼苗叶片衰老的延缓作用

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（ＡｓＡＰＯＤ）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、ＡｓＡＰＯＤ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、ＡｓＡＰＯＤ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。     

三唑酮对黄瓜子叶抗氧化酶活力的影响

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。     

水分胁迫下山黧豆多胺代谢与β—N—草酰—L—α,β—二氨基丙酸？…

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     

红豆杉组织培养中SINENXANS高产细胞系Ts19的几种同工酶动态比？…

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     

有害藻类及其微生物防治的基础：藻菌关系的研究动态

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...     

鼠伤寒沙门氏菌外膜蛋白诱导BALB／C小鼠免疫保护的实验研究

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     

中华姬鼠种群生态的初步分析

中华姬鼠种群生态的初步分析ＴＨＥＰＲＥＬＩＭＩＮＡＲＹＡＮＡＬＹＳＩＳＯＮＴＨＥＰＯＰＵＬＡＴＩＯＮＥＣＯＬＯＧＹＯＦＣＨＩＮＥＳＥＦＩＥＬＤＭＯＵＳＥ（ＡＰＯＤＥＭＵＳＤＲＡＣＯ）ＫｅｙＷｏｒｄｓＣｈｉｎｅｓｅＦｉｅｌｄＭｏｕｓｅ（Ａｐｏｄｅｍｕｓ...     

拟南芥：植物分子生物学研究的模式物种

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...     

三种钠尿肽抑制大鼠肺动脉平滑肌细胞增殖效应的比较

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,     

东北鼢鼠种群生长指标的主分量分析

东北鼢鼠种群生长指标的主分量分析ＰＲＩＮＣＩＰＡＬＣＯＭＰＯＮＥＮＴＡＮＡＬＹＳＩＳＯＦＧＲＯＷＴＨＩＮＤＥＸＯＦＰＯＰＵＬＡＴＩＯＮＦＯＲＭＡＮＣＨＵＲＩＡＮＺＯＫＯＲ（ＭＹＯＰＡＬＡＸＰＳＩＬＵＲＡＳ）东北鼢鼠（Ｍｙｏｐａｌａｘｐｓｉｌｕｒａｓ...     

Investigation of the mechanism of temperature sensitivity of the electroreceptors of ampullae of lorenzini

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.     

Principles of organization and evolution of systems of regulation of functions

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