三七胚培养中的胚胎发生

三七成熟胚培养于MS 1 mg/l IAA或NAA或2,4-D的培养基上。二月后,在MS 1mg/l IAA或NAA的培养基上由外植体可诱导产生胚状体,但在含2,4-D的培养基上只产生愈伤组织而无器官分化。胚状体转入MS GA_3 1mg/l IAA0.5 mg/l培养基上可发育成具胚根、根芽的小植株。     

景天、白兰花和雪松的组织培养

(一) 植物名称:景天(Sedum erythrostictum) 别名:活血三七、八宝。材料类别:叶片培养条件:生长培养基为1.MS基本培养基+KT2mg/l+2,4-D0.5mg/l+NAA0.25mg/l 2.MS基本培养基+NAA0.25mg/l+6-BA2mg/l+ZT1mg/l+LH1g/l。3.MS基本培养基+IAA     

红掌的离体组织培养与快速繁殖

本研究从红掌组培的实用化生产出发,在不同激素成份及浓度水平下,以MS为基本培养基,红掌的叶片或叶柄为外植体进行组培快繁试验。实验结果表明:MS+6-BA1mg/L+2.4-D0.1mg/L为最佳诱导培养基,诱导率可达89%以上,红掌的叶片诱导效果比叶柄较为理想。最适分化培养基为:MS+BA1.5mg/L+NAA0.1mg/L,其分化率为93%;继代增殖培养基为MS+6-BA2mg/L+NAA0.2mg/L,增殖系数达7.1;适合生根诱导培养基为l/2MS+NAA0.2mg/L,生根率达96.5%以上。生根苗田间移栽后成活率可达95%以上。     

矮生龙船花的组织培养和快速繁殖

矮生龙船花(IxoracoccineaL.)的带节茎段在MS 2,4D2.0mg/L培养基上产生大量的愈伤组织;在MS 6BA1.0mg/L NAA0.2mg/L培养基上芽的增殖系数达413,并产生少量的愈伤组织;在MS NAA0.2～2.0mg/L培养基上只产生芽而无愈伤组织形成。愈伤组织在MS 6BA0.5mg/L NAA0.5mg/L培养基上产生大量的不定芽,丛生芽在MS 6BA0.5mg/L NAA0.5mg/L培养基上生长较快并产生较多分枝,将分枝节下或切成段后在MS 6BA0.5mg/L NAA0.5mg/L培养基上能迅速生长并产生新的分枝。试管内小苗在1/2MS NAA0.5mg/L培养基上的生根壮苗效果较好。矮生龙船花试管苗成活率为935%。     

铁皮石斛组织培养与快速繁殖(简报)

以铁皮石斛种子为外植体进行组培快繁技术研究,筛选出适合各个阶段培养的培养基配方。种子萌发的培养基1/2MS+马铃薯汁15%;原球茎分化的培养基1/2MS+马铃薯汁20%+NAA 0.1 mg/L;壮苗培养基MS+香蕉汁10%+NAA 0.2 mg/L;生根培养1/2 MS+香蕉汁15%+NAA 0.5 mg/L。     

爱沙木组织培养快速繁殖(简报)

以爱沙木(Eremophila macdonnellii)种子为外植体,在不加任何生长调节剂的 MS 培养基上,种子可萌发成无菌苗;无菌苗带芽茎段在 MS 6-BA 2.0mg/L NAA 0.5mg/L 增殖培养基上,增殖倍数可达 5.0;在1/2MS NAA 0.5mg/L 1%活性碳的生根培养基上,生根率达 90%。     

荷叶铁线蕨孢子的离体繁殖（简报）

以荷叶铁线蕨当年生未成熟的孢子为材料.在MS 2,4-D1.0mg/L NAA0.5mg/L培养基上进行愈伤诱导;在MS 6-BA0.5mg/L NAA0.05g/L培养基上进行抽芽诱导与增殖培养,60d为一继代周期,繁殖系数为20～30;在1/2MS 6-BA0.5mg/L NAA0.05mg/L培养基上进行壮苗培养;在1/2MS IBA1.0mg/L培养基上进行生根培养;最后移栽到泥碳中,成活率可达90%.     

康乃馨茎段愈伤组织诱导及植株再生(简报)

以康乃馨无菌苗茎段为外植体,在MS 6-BA 0.5mg/L NAA0.2mg/L培养基上诱导产生愈伤组织,愈伤组织在MS 6-BA 0.5mg/L NAA 0.2mg/L培养基上诱导芽效果较好,芽苗在1/2MS NAA 0.1mg/L培养基上可诱导生根。     

八种不同花色一串红组织培养快繁的研究

对不同花色一串红组织培养快繁方法进行了研究,实验确定了一串红组织培养的最佳外植体为带腋芽的茎段,茎段的芽丛诱导的最佳培养基为1/2 MS＋NAA 0.1MG/l＋6-BA2.0mg/L＋IBA0.5mg/L,其分化率为71.4%,芽增殖率为140.6%,最佳生根培养基为1/4 MS＋NAA 0.5mg/L,生根率为91.6%,初步建立了快繁体系。     

独花兰组织培养与快速繁殖(简报)

以独花兰假鳞茎为外植体,在1/2MS+6-BA 0.5 mg/L+NAA 0.05 mg/L培养基上可诱导不定芽,在MS+6-BA 2.0 mg/L+NAA 0.1 mg/L+香蕉汁100 g/L培养基上进行增殖培养,在1/2 MS+IBA 0.5 mg/L+NAA 0.5 mg/L+活性炭0.5 g/L培养基上进行生根培养后移栽入透水性好的基质中,成活率达90%以上。     

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