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《北方园艺》2020,(3)
以南方高丛蓝莓"比洛克西"半木质化茎段为外植体,利用正交实验方法,高效优选其组织培养最佳条件。结果表明:外植体的最佳处理方法为先用75%乙醇消毒45s,再用10%NaClO消毒10min,然后把茎段接种到含WPM+ZT 1.00mg·L~(-1)的初代诱导培养基中;增殖培养的最佳培养基为WPM+6-BA 1.00mg·L~(-1)+ZT 2.00mg·L~(-1)+IBA 0.25 mg·L~(-1),壮苗培养的最佳培养基为WPM+ZT 0.50 mg·L~(-1)+IBA0.50mg·L~(-1);生根诱导的最佳培养基质为WPM+蛭石∶椰糠(V 1∶1)+活性炭3.00g·L~(-1)+IBA 0.500mg·L~(-1)。 相似文献
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以金叶锦带的腋芽为外植体,采用组织培养法,通过在培养基中添加不同浓度激素,筛选最佳培养基,为金叶锦带的大面积推广提供技术支撑。结果表明:最佳诱导培养基为MS+0.6mg·L~(-1) 6-BA+0.1mg·L~(-1) NAA+蔗糖30g·L~(-1)+琼脂7g·L~(-1),诱导率达86.3%;最佳增殖培养基为MS+1.0 mg·L~(-1) 6-BA+1.0 mg·L~(-1) GA3+蔗糖30g·L~(-1)+琼脂7g·L~(-1),增殖系数7.250 6;最佳生根培养基为1/2MS+1.0mg·L~(-1) IBA+蔗糖30g·L~(-1)+琼脂7g·L~(-1),生根率100.0%。 相似文献
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以红掌实生苗根段为外植体,通过在培养基中添加抗生素来抑制病原菌的快速繁殖,并建立了完整的再生体系。结果表明:硫酸链霉素抑制病原菌的效果最好,其次是卡那霉素,庆大霉素抑菌效果最差;30mg·L~(-1)的硫酸链霉素因抑菌效果好,保持更高的根段活率而更适合在组织培养中应用;愈伤组织诱导的最佳培养基为MS+6-BA1.0mg·L~(-1)+2,4-D0.5mg·L~(-1)+硫酸链霉素30mg·L~(-1),愈伤组织增殖的最佳培养基为MS+6-BA1.0mg·L~(-1)+2,4-D0.8mg·L~(-1),丛生芽诱导最佳培养基为1/2MS+6-BA0.5mg·L~(-1),丛生芽生根最佳培养基为1/2MS+NAA0.2mg·L~(-1),生根后的幼苗,移栽成活率高达100%。 相似文献
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以桔梗的子叶和下胚轴为外植体,采用离体培养的方法,研究了诱导芽的频率,找出较为理想的外植体类型和相应的培养条件,以期建立高效的桔梗组培再生体系,为桔梗优良株系的繁育和利用提供有效途径。结果表明:桔梗的子叶、下胚轴均可成功诱导出再生芽,其中以子叶诱导率最高,最适合的培养基为MS+1.0 mg·L~(-1) BA+0.5 mg·L~(-1)IAA,在MS+0.5mg·L~(-1)?BA+1.0mg·L~(-1)?IAA的培养基上桔梗再生芽的生长长度最高。因此,桔梗的子叶是最理想的外植体类型,相应的分化培养基组合为MS+1.0mg·L~(-1)BA+0.5mg·L~(-1)?IAA,伸长培养基组合为MS+0.50mg·L~(-1)?BA+1.0mg·L~(-1)?IAA。 相似文献
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以杜仲的幼嫩茎段为试材,采用组织培养的方法,研究了消毒时间、基本培养基、NAA浓度、6-BA浓度、低温处理时间及培养环境对杜仲腋芽诱导及其分化的影响,以期为建立杜仲高效组织培养体系提供依据。结果表明:最佳消毒时间为9 min,污染率与死亡率均较低,分别为10.00%和26.67%;腋芽诱导的基本培养基以MS培养基为最佳,诱导率达91.66%;诱导培养基为MS+0.2 mg·L~(-1) 6-BA+0.03 mg·L~(-1) NAA时,腋芽的诱导率较高,达93.33%,且生长良好;当低温处理时间为24 h时,外植体诱导效果最好,且褐化率最低,为5.00%;与黑暗培养相比,光照培养条件更加有利于杜仲的腋芽诱导和生长;MS+1.5 mg·L~(-1) 6-BA+0.1 mg·L~(-1) NAA为愈伤分化的最佳培养基,MS+2.5 mg·L~(-1) 6-BA+0.1 mg·L~(-1) NAA为芽增殖的最佳培养基。 相似文献
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以"五彩珍珠"番茄为试材,选取6d苗龄无菌苗的子叶和下胚轴为外植体,研究了不同激素浓度及配比对番茄愈伤组织的诱导、不定芽分化及生根的影响,以建立番茄再生体系。结果表明:诱导"五彩珍珠"番茄愈伤组织的最佳培养基为MS+0.4mg·L~(-1)IAA+2.0mg·L~(-1)6-BA,其子叶的诱导率为100%,下胚轴的诱导率为95%;不定芽分化的最佳培养基为MS+0.2mg·L~(-1) IAA+(1.0~3.0)mg·L~(-1) 6-BA;诱导生根的最佳培养基为1/2MS+0.10mg·L~(-1)NAA。子叶为最佳外植体,其不定芽的分化率及生长情况均优于下胚轴。 相似文献
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《北方园艺》2020,(8)
以毛棉杜鹃嫩茎为试材,采用无菌培养方法,研究了外植体灭菌方法、基本培养基的筛选、增殖培养、伸长培养、生根培养、炼苗与移栽,以期建立毛棉杜鹃组织培养快速繁殖体系。结果表明:毛棉杜鹃嫩茎最佳灭菌方法是用70%酒精浸泡10 s,2%NaClO浸泡15 min,用无菌水冲洗5～6次;WPM培养基为最佳的基本培养基;增殖培养基为WPM+ZT 2.0 mg·L~(-1)+NAA 0.5 mg·L~(-1)+蔗糖30 g·L~(-1),pH 5.0;伸长壮苗培养基为WPM+ZT 0.5 mg·L~(-1)+GA_3 2.0 mg·L~(-1)+蔗糖30 g·L~(-1),pH 5.0;生根培养基为WPM+IAA 0.1 mg·L~(-1)+蔗糖1 g·L~(-1),pH 5.0;移栽基质为珍珠岩:草炭土=1∶1配制的培养土,移栽成活率为90%以上。 相似文献
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《中国瓜菜》2019,(5):22-27
为了建立高频的苦瓜离体再生体系,为苦瓜遗传转化提供技术基础,筛选了最适消毒方法和外植体类型。以MS培养基为基础培养基,添加不同浓度激素组合,筛选最适于苦瓜不定芽诱导、伸长和生根的培养基。最佳的消毒方法为:用水浸泡去壳的种子15 min,在超净工作台中用75%酒精浸泡30 s后再用4%NaClO浸泡6 min,用无菌水冲洗4～5遍,污染率为0,发芽率为98%;最佳的愈伤组织诱导培养基为MS+2.5 mg·L~(-1)6-BA+0.01 mg·L~(-1)IBA,愈伤组织密度为0.79 g·cm~(-3),不定芽的分化率为39%,最佳外植体为下胚轴(12 d),诱导率为41%;最佳的增殖培养基为MS+1.0 mg·L~(-1)6-BA+0.005 mg·L~(-1)IBA;最佳的生根培养基为MS+0.1 mg·L~(-1)IBA,移栽存活率为74%。初步建立了苦瓜离体再生体系。 相似文献
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美国红枫的组织培养与快繁技术 总被引：1，自引：0，他引：1
以美国红枫腋芽茎段为外植体,采用组织培养方法,研究了不同激素配比对美国红枫无菌体系的建立、启动、增殖、壮苗培养、试管苗生根移栽的影响。结果表明:带腋芽茎段最佳消毒方式为以70%酒精浸泡30s,1%升汞消毒6min,成活率和抽芽率最高,分别达到75.22%和95.13%;NAA对启动培养的影响大于6-BA,接种于培养基MS+NAA 0.05mg·L~(-1)+6-BA0.5mg·L~(-1)中的外植体诱导率最高,为62.80%,培养基及激素的最佳配比为NN69+2,4-D0.1mg·L~(-1)+TDZ 0.3mg·L~(-1),诱导率达到80.21%;增殖培养阶段的最佳培养基为NN69+NAA 0.1mg·L~(-1)+TDZ 0.3mg·L~(-1),增殖系数为4.2;MS+2,4-D 0.1mg·L~(-1)+6-BA0.5mg·L~(-1)能有效促进小苗的生长;生根培养最适培养基MS+NAA 0.1mg·L~(-1)+2,4-D0.5mg·L~(-1),生根率达99.8%,生根条数达7.9,根长达6.5cm;练苗后移栽到蛭石+珍珠岩(1∶1)基质中,移栽成活率为75.2%。 相似文献
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The effects of combinations of salinity (no salt, 2000 p.p.m. or 4000 p.p.m. of CaCl2 and NaCl, 1:1) and water table (30 cm, 60 cm or 90 cm from the soil surface), on the vegetative growth and tolerance of ‘Golden Japanese’ plum and ‘Mit Ghamre’ and ‘Balady’ peaches were studied. The plants were grown in lysimeters. The growth of the trunk, total shoot length, the increase in shoot length per cm and the fresh weight of top, root and total plant were reduced with increasing salinity of the irrigation water. The effect was accentuated when the plants were maintained at high water table level. The salinity treatments resulted in the death of 43%, 73% and 76% of the plants in the plum, and the ‘Mit Ghamre’ and ‘Balady’ peaches, respectively, indicating that the plum is more tolerant to salinity than the peach. The plants of the salinity treatments showed various symptoms of salt injury, such as leaf burn, defoliation, shoot die-back and finally death. In the peaches, salt injury started to occur in the first growing-season, whereas the salt injury appeared in the plum in the second growing-season. The symptoms were more pronounced in the 4000 p.p.m. treatment than in the 2000 p.p.m. treatment and were more pronounced at the high water table level. The salinity level was the predominant factor and the effect of the water table on the vegetative growth diminished with increase in the salinity level of the irrigation water. 相似文献
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AIM：To establish a fast, accurate and economical technique for culturing mouse pulmonary arteriolar smooth muscle cells (PASMCs), and to explore the effects of hypoxia on the proliferation and apoptosis of the PASMCs. METHODS：In sterile condition, the pulmonary artery was isolated from the male BALB/c mice by digesting with collagenase I, and the cells were cultured in fetal bovine serum-coated flask. Centrifugal procedure was not used during the cell passage. The cell morphology was observed under an inverted phase-contrast microscope. α-Smooth muscle actin was identified by immunocytochemistry and immunofluorescence. The effects of hypoxia on the proliferation and apoptosis of the PASMCs were detected by CCK-8 assay and TUNEL assay. RESULTS：PASMCs were identified by the methods of immunocytochemistry, immunofluorescence staining and observation of morphology. Unlike the rat PASMCs with typical subcultured peak-vally pattern, the mouse PASMCs showed a lot different without a peak-vally pattern. The cells could be subcultured after 5 d to 7 d and there was 3 to 5 generations depending on the activity of the cells. CCK-8 assay demonstrated that the A values of PASMCs exposed to hypoxia increased after 24 h (P＜0.05) as compared with normoxia. TUNEL result showed that the apoptotic index of the PASMCs in hypoxia decreased after 24 h (P<0.05). CONCLUSION：This technique for obtaining cultured mouse PASMCs is simple, fast, accurate and economical. The digestion time is easy to control. Hypoxia promotes the proliferation and inhibits the apoptosis of PASMCs. 相似文献
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小檗碱和壳聚糖抗蔬菜病原真菌活性测定及复合膜制备 总被引：2，自引：0，他引：2
研究了小檗碱和壳聚糖对几种常见蔬菜病原真菌的抑制活性,以及以小檗碱和壳聚糖为主料制备复合膜的方法,并测定了该膜的药物释放效果。试验表明:低浓度(0.234 mg/mL)小檗碱即可抑制辣椒炭疽病菌(Vermicularia capsici)等5种蔬菜病原真菌的生长。20 mg/mL浓度壳聚糖对番茄灰霉病菌(Botrytis cinerea)的抑制率高达65%,而对其余4种果蔬病原真菌也有一定的抑制作用。为了集成这2种天然化合物的优点,制备了小檗碱-壳聚糖复合膜,该膜具有缓释功能,在模拟外部环境(磷酸缓冲液,pH 6.8)条件下,20 d小檗碱累计释放率接近25%,提示其在果蔬贮藏抗菌中的应用价值。 相似文献
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Fresh onion seeds desiccated to 6.0% seed moisture content (SMC) were stored in various packaging materials under different storage conditions. Seeds packed in aluminum-laminated pouches beside those stored with silica gel at 25 °C maintained satisfactory germinability and vigour after 12 months. Desiccated seeds stored in moisture impervious containers produced more vigourous seedlings. Germination potential of onion seeds increased with reduced SMC besides storage in moisture impervious packets along with desiccants as physiological and biochemical attributes are regulated. Seed viability and vigour decreased with accelerated ageing due to increased lipid peroxidation, decreased activities of several free radical and peroxide scavenging enzymes. Electrical conductance of seed leachates also increased with ageing. Thus, adoption of appropriate storage temperature and moisture control techniques would significantly affect onion seed quality, which was due to minimum accumulation of free peroxide radicals and enhanced activity of free radical scavenging enzymes. 相似文献
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以大荔县冬枣种植区采集的发病枣果为试材,采用常规组织分离法进行病原菌的分离纯化,通过柯赫氏证病法则、形态学观察及分子生物学分析,研究鉴定了冬枣黑斑病和炭疽病的病原菌种类,并采用田间调查法对2种病害为害特征进行比较分析,以期为田间有效区分冬枣黑斑病和炭疽病为害症状,并快速判断其病原类型,及进一步深入开展精准防控提供参考和指导.结果表明:陕西大荔冬枣黑斑病的病原菌为细极链格孢(Alternaria tenuissima),炭疽病的病原菌为胶孢炭疽菌(Colletotrichum gloeosporioides).2种病害均主要为害枣果实,在枣果果腰或果肩上形成黑褐色病斑,可能同时存在且症状相近极易混淆,但在病斑表面、皮下及久置表型3个方面存在明显区别. 相似文献
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钾肥在小白菜和萝卜上的施用效果 总被引：6，自引：0，他引：6
采用盆栽试验方法研究了施用钾肥对小白菜、萝卜生长发育、产量、品质及钾素含量的影响。结果表明 ,施用钾肥对小白菜和水萝卜的株高、叶片数无显著的影响 ,但可提高水萝卜块根的产量 ,提高幅度为 31.0 4 %～ 97.93%。施用钾肥可提高小白菜和萝卜的蛋白质和VC含量 ,降低硝酸盐含量 ,增加植株的钾素含量 相似文献