吲哚美辛对去除下胚轴和根后的绿豆茎段生根的影响

吲哚美辛和甘油均显著促进绿豆去除下胚轴和根后的茎段生根 ,根数和根干重增加 ;二者有促进生根的相加效应 ,吲哚美辛和甘油的最佳配比 (mol·L-1)为 5 .0× 10 -4∶0 .5。     

布洛芬对菊花插条生根、菊苗质量的影响

研究了布洛芬对菊花插条生根、茎叶生长和菊苗质量的影响。结果表明,将菊花插条束蘸1000mg.L^-1布洛芬液5g然后扦插,能有效地促进菊花插条生根,显著增加平均每插条的生根数、最长根长度和根干重;并能促进菊苗生长,增加茎叶鲜重;菊苗的质量明显提高。     

两种野生花卉的扦插繁殖研究

开展野生花卉车轮梅(Raphiolepis indica)和赤楠(Syzygium buxifolium)扦插试验,结果表明:车轮梅硬枝扦插需一定浓度的外源激素方能生根;对激素浓度大小不敏感;总体上NAA组合生根质量优于IBA组合。综合不同处理生根率、根数和不定根根长3个指标,以800 mg/L NAA或800 mg/L IBA作为车轮梅生产上扦插的激素种类和浓度。赤楠生根率较低,最高扦插率达66.7%,生根时间长,约需45 d始生根。综合生根率、不定根根数和不定根根长3个生根指标,试验的4种激素均能较好促进赤楠生根,200×根太阳在生根率和根数上效果最好,生产上可用200×根太阳浸泡2 h,也可用50-100 mg/L NAA或100-400 mg/L IBA浸泡2 h后进行扦插。     

布洛芬对绿豆下胚轴插条生根的影响(简报)

人工合的解热镇痛抗炎药布洛芬能显著促进绿豆下胚轴生根,增加根数和根干重。     

不同株龄日本落叶松插穗的内源激素含量与生根的关系

研究了日本落叶松母株年龄、插穗内源激素含量与生根之间的关系,以及外源IBA对插穗内源激素含量的影响及其对插穗生根的促进作用。结果表明：不同株龄插穗生根性状及插穗茎和叶中激素含量差异均达极显著水平,叶中激素含量对插穗生根力没有直接影响;插穗茎中生根抑制激素（ABA）含量随株龄增长而增加,生根促进激素与抑制激素的比值（IAA＋GA＋ZR）/ABA却随株龄的增长而递减,与生根力随株龄的变化趋势一致,且该比值与生根性状紧密相关,因此可作为评价母株（无性系）生根力的指标;插后13～32d是插穗愈伤组织形成和不定根诱导的关键期,此期生根促进激素消耗量大,茎中含量大幅度降低,进入根伸长生长阶段,含量上升;外源IBA促进插穗生根的机制在于通过外源激素的刺激,在不定根诱导期,插穗茎中ABA含量大幅度降低,从而有利于不定根的发生和发育。     

多效唑和三唑酮对非洲菊微繁的效应

培养基中加入多效唑0．2,0．4,0．6mg／L,可使非洲菊组培苗健壮、矮化,提高增殖系数,促进继代后生根;在生根培养基中加入0．2～1．0mg／L多效唑,可增加生根量,促进根的增粗,提高移栽成活率。0．1mg／L三唑酮可降低植株高度,提高增殖率。     

多胺、青霉素、苯甲酸钠和多菌灵对绿豆下胚轴插条生根的影响

10~(-5)～8×10~(-4)mol/L浓度范围内的四种多胺(腐胺、尸胺、亚精胺、和精胺)、100～1000ppm的青霉素和200～1500ppm的苯甲酸钠都能促进绿豆下胚轴插条生根,增加根数和根干重。500～5000ppm的多菌灵则抑制生根。四种多胺和青霉素与吲哚丁酸(IBA)具相加效应,苯甲酸钠与IBA具协同效应,多菌灵则抑制IBA诱导的生根。     

纳米化的二氧化钛促进绿豆下胚轴不定根形成

5～200mg·L-1纳米化的TiO2能明显增加绿豆下胚轴不定根的数目、根干重和生根范围;光照条件下显著促进绿豆下胚轴不定根的形成;不同时间促生根效果不同,以6～18 h的效果最好.     

杂种落叶松扦插生根过程中可溶性蛋白的比较分析

杂种落叶松(长白落叶松×日本落叶松)(Larix olgensis×Larix kaempferi)插穗在生根过程中,可溶性蛋白的 SDS-PAGE图谱分析推测:24KD、26KD和39KD蛋白,与根原基的发生、分化有关;28KD蛋白具有促进根原基继续发育长出不定根的作用;47KD蛋白阻遏根原基的发生或抑制不定根的生长。     

钾对离体黄瓜子叶生根及根生长的促进作用（简报）

0.134～40.2mmol/L的KCI明显促进离体黄瓜子叶的生根、根长和根鲜重的增加。0.134～13.4mmol/L的KCl则抑制离体黄瓜子叶IAA氧化酶的活性。1.34mmol/L的高锰酸钾、酒石酸钾和邻苯二甲酸氢钾也促进离体黄瓜子叶的生根。     

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