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1.
INTRODUCTION Many tree species have become the focus of in-creasing conservation concern in recent years, pri-marily because of the current high rates of forest clearance and over-exploitation (Newton et al., 1999).As an illustration, recent surveys have indicated that around 9000 tree species are threatened with extinc-tion (Oldfield et al., 1998). Aquilaria agallocha (Thymelaeaceae) is one of very few species of tropi-cal trees and is the principal source of agarwood, one of the most … 相似文献
2.
皱叶忍冬的组织培养与快速繁殖初步研究 总被引：5，自引：0，他引：5
以宜州当地主要金银花品种皱叶忍冬的茎段为外植体材料,于MSt和1/2MS附加不同激素配比的基本培养基上,探讨丛生芽诱导及生根诱导的条件。试验结果表明：丛生芽诱导和继代培养的培养基为MS 6-BA0．5mg／L IBA0．05mg／L,生根培养基为1/2MS IBA1．0mg／L NAA0．05mg／L． 相似文献
3.
瀑布兰组织培养快速繁殖技术的研究 总被引：1，自引：0，他引：1
采用植物组织培养技术,开展瀑布兰的诱导分化、芽苗增殖、壮苗培养、生根和移栽等系列研究．结果表明：瀑布兰适宜的诱导分化培养基为：MS＋BA2．0mg／L＋NAA0．2mg／L,其分化率可达69．8％;增殖培养基为：MS＋BA3．0mg／L＋NAA0．2mg／L,培养60d的增殖系数达到4．9;壮苗培养基为：1／2MS＋NAA0．2mg／L＋BA0．5mg／L＋香蕉泥10％;生根培养基为：1／2MS＋NAA0．5ms／L;当幼苗长高至3-4cm,生根5-7条,根长至1-2cm时,移栽至水草中,成活率达75％以上． 相似文献
4.
树莓丛生芽诱导与植株再生 总被引：3，自引：0，他引：3
取树莓当年生的幼嫩枝做外植体,培养于附加不同种类和不同浓度激素的MS培养基上,在诱导培养基MS 6-BA0．5mg/l NAA0．05mg/l上培养20d左右,腋芽开始分化增殖。在芽的增殖试验中发现加入一定量的CA,可大大提高增殖率,适宜的培养基为6-BA1．0mg/l NAA0．05mg/l GA_30．5mg/l,有效增殖系数达3．38。用1/2MS NAA0．4mg/l时生根效果较好,生根率达90%以上。 相似文献
5.
樱桃番茄"情人果"离体再生体系的建立 总被引：1，自引：0，他引：1
以樱桃番茄“情人果”的无菌苗茎段为材料,研究了不同激素处理对其不定芽诱导以及芽苗生根的影响,结果表明:(1)不定芽诱导的最适培养基配方为MS 6-BA0.5mg/L;(2)芽苗生根的最适培养基配方为:MS NAA0.05 mg/L。 相似文献
6.
Khalafalla MM Daffalla HM Abdellatef E Agabna E El-Shemy HA 《Journal of Zhejiang University. Science. B》2011,12(4):303-312
This report describes in vitro micropropagation of Boscia senegalensis, so-called famine foods, that helped the people in Darfur and Kordofan, Sudan survive during the 1984–1985 famine. Four types
of explants prepared from green mature zygotic embryos were cultured on Murashige and Skoog (MS) medium augmented with 1–5
mg/L 6-benzyladenine (BA). The highest number of shoots per explant (14.3±0.9) was achieved on MS medium supplemented with
3 mg/L BA, while the highest shoot length [(3.5±0.4) cm] was obtained with 1 mg/L BA. The shoot cluster, when subcultured
to its same medium, significantly increased the rate of shoot multiplication by the end of the third subculture. The maximum
mean number of shoots per explant (86.5±3.6) was produced after three multiplication cycles on 3 mg/L BA-supplemented medium.
In vitro induced shoots were excised and rooted on half strength MS medium fortified with 0.25 mg/L indole-3-butyric acid
(IBA) to obtain complete plantlets. B. senegalensis-regenerated plantlets obtained in vitro for the first time, were hardened and 95% survived under greenhouse conditions. 相似文献
7.
以丽格海棠巴科斯品系叶片为材料,进行外植体的诱导培养、不定芽继代增殖培养、无根苗生根培养等组织培养技术研究,探索其适宜的培养基和培养条件．结果表明：在MS＋BA1．0mg／L＋NAA0．2mg／L培养基上丽格海棠叶片诱导不定芽效果最好;在MS＋BA0．1mg／L＋NAA0．0lmg／L培养基上继代增殖效果较好;在1／2MS＋NAA0．2mg／L培养基生根诱导培养效果较好．苗高6cm可出瓶过渡移栽,并保持90％以上的空气湿度,温度为（25±3）℃,成活率最高． 相似文献
8.
以大花蕙兰的茎尖为外植体,探讨了不同培养基对原球茎增殖、分化和小苗诱导及壮苗生根的影响．结果表明：1)大花蕙兰组织培养的原球茎诱导和增殖都可以用培养基1／2MS BA1．0mg／L NAA0．5mg／L;2)适合大花蕙兰组织培养原球茎芽苗诱导的培养基配方为1／2MS BAl．5mg／L NAA0．5mg／L;3)适合大花蕙兰壮苗生根的培养基配方为1／2MS NAA0,1mg／L GAl．0mg／L的组合． 相似文献
9.
The effect of Al and Cd on the growth, photosynthesis, and accumulation of Al, Cd and plant nutrients in two soybean genotypes were determined using hydroponic culture. There were six treatments: pH 6.5; pH 4.0; pH 6.5 1.0 μmol/L Cd; pH 4.0 1.0 μmol/L Cd; pH 4.0 150 μmol/L Al; pH 4.0 1.0 μmol/L Cd 150 μmol/L Al. The low pH (4.0) and Al treatments caused marked reduction in root length, shoot height, dry weight, chlorophyll content (SPAD value) and photosynthetic rate. Al-sensitive cv. Zhechun 2 accumulated comparatively more Al and Cd in plants than Al-tolerant cv. Liao 1. Compared with pH 6.5, pH 4.0 resulted in significant increase in Cd and Al concentration in plants. Combined application of Cd and Al enhanced their accu-mulation in roots, but caused a reduction in shoots. The concentrations of all 10 nutrients (P, K, Ca, Mg, Fe, Mn, Cu, Zn and B), except Mo were also increased when plants were exposed to pH lower than pH 6.5. Al addition caused a reduction in the con-centration of most nutrients in plant roots and shoots; but K, Mn and Zn in roots were increased. Treatments with Cd alone or together with Al reduced the concentrations of all the plant nutrients in plants. Al-sensitive genotype Zhechun 2 has lower nutrient concentration than Al-tolerant genotype Liao 1. The current findings imply that Al and Cd are synergistic in their effect on plant growth, physiological traits and nutrient uptake. 相似文献
10.
以绞股蓝茎尖、茎段、叶片为外植体,研究了不同种类、不同浓度配比的外源激素对绞股蓝愈伤组织诱导的影响。结果表明：茎尖在培养基MS＋6- BA 1.0 mg·L-1＋NAA 0.02 mg·L-1中的诱导效果最好,其诱导率为75.0%;茎段在培养基MS＋6- BA 2.0 mg·L-1＋NAA 0.2 mg·L-1中的诱导效果最好,其诱导率为81.8%;叶片在培养基MS＋6- BA 1.0 mg·L-1＋NAA 0.15 mg·L-1中的诱导效果较好,其诱导率为69.2%。 相似文献
11.
Objective: To study the stereoselective glucuronidation of carvedilol (CARV) by three Chinese liver microsomes. Methods: The metabolites of CARV were identified by a hydrolysis reaction with β-glucuronidase and HPLC-MS/MS. The enzyme kinetics for CARV enantiomers glucuronidation was determined by a reversed phase-high pressure liquid chromatogra-phy (RP-HPLC) assay using (S)-propafenone as internal standard after precolumn derivatization with 2,3,4,6-tetra-O-acetyl-β-D-glucopyranosylisothiocyanate. Results: Two CARV glucuronides were found in three Chinese liver microsomes incubated with CARV. The non-linear regression analysis showed that the values of Km and Vmax for (S)-CARV and (R)-CARV enantiomers were (118±44) μmol/L, (2 500±833) pmol/(min·mg protein) and (24±7) μmol/L, (953±399) pmol/(min·mg protein), respectively. Conclusion: These results suggested that there was a significant (P<0.05) stereoselective glucuronidation of CARV enantiomers in three Chinese liver microsomes, which might partly explain the enantioselective pharmacokinetics of CARV. 相似文献
12.
以食用仙人掌的茎片为外植体，研究了食用仙人掌离体快繁的若干影响因素。结果表明，幼嫩的茎片较成熟的茎片易于进行表面消毒。适宜的培养基为：侧芽诱导MS＋6－BA2.0mg/L NAA0.1mg/L，继代与增殖MS＋6－BA2.0mg/L NAA0.1mg/L，培养21d，增殖倍数6．9，生根培养基为1／2 MS＋NAA0.1mg/L，称载基质为泥碳：珍珠岩＝1：1，成活率98％。 相似文献
13.
β-glucanase was purified from a solid-state culture ofTrichoderma reesei on wheat bran in three steps which comprised ammonium sulfate precipitation, Sephadex G-100 chromatography, and DEAE-Sephadex
A-50 chromatography. The molecular mass was determined to be 35.21 kilodaltons by sodium dodecyl sulfate-12.5% polyacrylamide
gel electrophoresis. The β-glucanase at low pHs was more stable than that at high pHs, and optimum pH was 5.0. The optimum
temperature was 60°C, and β-glucanase was relatively stable at below 40°C for 60 min. TheK
m of the enzyme on β-glucan was 10.86 mg/ml, and theV
max on β-glucan was 14286 μmol of glucose equivalents per mg of the pure enzyme per min. The β-glucanase activity was significantly
inhibited by Fe3+ ions, and was reduced in the presence of Cu2+ ions, Mn2+ ions and Mg2+ ions at 5 mmol/L and 10 mmol/L, respectively. The β-glucanase activity was stimulated by Co2+ ions, Ca2+ ions, Zn2+ ions, and Fe2+ ions at 1 mmol/L and 5 mmol/L, respectively.
Project supported by Foundation for University Key Teacher of the State Ministry of Education, the National Natural Science
Foundation of China (No. 30000118) and Zhejiang Provincial Natural Science Foundation of China (No. 399409). 相似文献
14.
用百合叶片及其鳞茎叶片离体诱导不定芽 总被引：1，自引：0，他引：1
以MS为基本培养基，附加不同浓度配比的NAA、6-BA、TDZ、2．4-D等激素，分别对5种百合的鳞片叶和叶片进行培养．结果显示，叶片经MS TDZ0．5mg／L和MS 2．4-D0．2mg／L TDZ2．0mg／L诱导可产生不定芽，诱导率最高为20％．MS NAA0．03mg／L、MS NAA0．05mg／L和MS 6-BA2．0mg／L 2．4-D0．2mg／L的培养基都不同程度诱导鳞片叶产生多个不定芽。以MS NAA0．05mg／L芽诱导率最高，不定芽经过继代培养，可长出新鳞茎． 相似文献
15.
This paper presents ak-ε-k
p
multi-fluid model for simulating confined swirling gas-solid two phase jet comprised of particle-laden flow from a center
tube and a swirling air stream entering the test section from the coaxial annular. A series of numerical simulations of the
two-phase flow of 30 μm, 45 μm, 60 μm diameter particles respectively yielded results fitting well with published experimental
data.
Project is supported by Zheijiana Provincial Natural Science Foundation (No. 598017) 相似文献
16.
以大岩桐幼嫩叶片为外殖体,通过0.1%氯化汞消毒后进行组织培养,适宜条件为:(1)诱导培养基为MS+BA2.0mg.L-1(以下单位同)+NAA0.2;(2)继代培养基为MS+BA1.0+NAA0.5;(3)生根培养基1/2MS+IBA1.0+活性炭1.0g.L-1。大岩桐在适合的条件下移栽生长良好,具有很高的经济效益。 相似文献
17.
植物激素对水仙(Narcissus tazetta var.Chinensis)愈伤组织形成及分化的影响 总被引：2，自引：0，他引：2
水仙鳞茎切块在附加不同种类和浓度的植物激素的MS培养基上可诱导产生白色或浅黄色的愈伤组织。形成的愈伤组织可以在上述新鲜培养基上不断继代培养。愈伤组织转至含BA或NAA的MS培养基上 ,均能产生分化不定芽。培养基中NAA浓度高有利不定根的分化。不定芽抽叶后 ,形成休眠的小鳞茎。在添加不同浓度的BA和NAA的MS培养基上 ,均能抽叶生根 ,由小鳞茎长成完整的植株。 相似文献
18.
19.
朱缨花愈伤组织的诱导 总被引：1，自引：0，他引：1
研究了不同外植体和不同生长调节剂对朱缨花愈伤组织诱导的影响．结果表明：不同外植体的愈伤组织诱导能力为茎段〉带节茎段〉叶柄〉叶片，茎段和带节茎段是愈伤组织诱导的最佳外植体；诱导朱缨花茎段愈伤组织的最佳生长调节剂组合为MS＋NAA1mg／L和MS＋BA0．5mg／L＋NAA1mg／L;诱导朱缨花带节茎段愈伤组织的最佳生长调节剂组合为MS＋BA2mg／L＋NAA1．5mg／L． 相似文献
20.
用滇龙胆的顶芽及侧芽为外植体,以MS培养基为基本培养基,以6-BA/NAA和KT/IAA两组不同浓度组合进行对比实验,研究诱导滇龙胆顶芽及侧芽萌发产生不定芽的最佳条件。发现在诱导率、产生的不定芽数、长势及不定芽出现时间等方面上,BA/NAA两种激素的互作用效果明显优于KT/IAA。其中以MS+BA3.0mg/l+NAA1.5—2.0mg/l的培养基上诱导率较高,可达100%,且小植株生长茁壮,叶色浓绿,大部分在10d左右可萌发出不定芽,产生不定芽数达7—9个。 相似文献