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《河西学院学报》2017,(5):52-58
研究不同外植体、激素种类及其配比对黑果枸杞(Lycium ruthenicum Murr.)愈伤组织诱导和增殖的影响,建立优良的愈伤组织培养体系.结果表明,适合黑果枸杞愈伤组织诱导的最佳外植体是下胚轴,愈伤组织诱导适宜的培养基为MS+0.4mg·L~(-1)NAA+0.5mg·L~(-1)6-BA,诱导率达100%;增殖的适宜培养基是MS+0.4mg·L~(-1)6-BA+1.0mg·L~(-1)NAA+0.5mg·L~(-1)IAA,在此培养基上愈伤组织可连续增殖,在20d内增殖系数可达到3.22,且愈伤组织生长状态良好,质地松散,适合建立稳定高效的愈伤组织培养体系. 相似文献
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以加拿大杨茎段为外植体探讨不同激素处理对愈伤组织诱导及不定芽形成的影响.研究表明,在外植体消毒中,以0.1％升汞处理4.5min时间效果最好,以MS培养基＋0.15mg·L-1TDZ＋ 0.1mg·L-1NAA＋1.0mg·L-16-BA的愈伤组织诱导率最高达60％.丛生芽诱导最佳培养基为MS培养基＋0.15mg·L-1TDZ＋0.125mg·L-1NAA＋1.25mg·L-16-BA,丛生芽诱导率达86.7％. 相似文献
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以菘蓝离体叶片为外植体,研究了激素种类和浓度、接种方式、光照条件等因素对叶片再生的影响,建立了菘蓝离体叶片高频再生体系.结果表明:以MS+6-BA2.0 mg/L+NAA0.2 mg/L+3%蔗糖为培养基,接种后暗培养5天转到光下培养,叶片远轴面向下接触培养基对不定芽的再生最为有效,不定芽不经过愈伤组织阶段直接从叶片上分化产生,再生率高达93.10%.以1/2MS为培养基附加0.1 mg/LNAA可使不定芽生根率达到100%. 相似文献
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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
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中药王不留行的组织培养技术初探 总被引：1，自引：0，他引：1
选取王不留行饱满种子培养无菌苗,用无菌苗的茎和叶作为外植体,分别接种MS基本培养基外加激素NAA和6-BA诱导愈伤组织和不定芽,使用1/2MS培养基,附加IBA或NAA进行不定芽的生根实验,最后炼苗和移栽.实验结果表明王不留行的最优组织培养方案:种子用0.1%升汞消毒8m in,无菌湿脱脂棉催芽,茎和叶作为外植体,使用MS 0.1mg/L NAA 0.1mg/L 6-BA诱导愈伤组织和不定芽,1/2MS 0.15mg/L NAA诱导植株生根. 相似文献
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樱桃番茄的组织培养与快速繁殖研究 总被引：1，自引：0，他引：1
以樱桃番茄新品种“圣女”和“金珠”的叶片、茎段和幼芽为外植体进行试管培养 ,结果表明 :叶片、茎段和幼芽均可诱导形成愈伤组织 ,愈伤组织可分化出芽丛 ,腋芽可直接萌生 ,不定芽可诱导生根成完整植株 .经试验筛选出各培养阶段的最适培养基为 :(1)愈伤组织诱导 :叶片以MS Kt4mgL IAA8mgL为最佳 ;茎段和幼芽以MS NAA0 1mgL 6 -BA1 5mgL为最佳 ;(2 )愈伤组织芽的分化 :MS IAA0 2mgL 6 -BA2mgL ;(3)腋芽萌生 :MS 6 -BA2 5mgL IBA0 1mgL ;(4)生根 :无激素的Ms或Mso . 相似文献
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以一株无患子优树嫩叶为外植体,采用多因素正交试验筛选其愈伤组织诱导、体胚分化及植株再生的适宜培养基组成。结果表明：6-BA对无患子叶片愈伤组织诱导的影响显著,在添加1.0 mg·L^-16-BA和0.1 mg·L^-1NAA的MS培养基上培养21 d,愈伤组织诱导率达92.5%;愈伤组织在添加1.0 mg·L^-16-BA、0.5 mg·L^-12,4-D和1.0 mg·L^-1NAA的MS培养基上经3次继代,可分化出体胚,分化率为33.4%;初分化体胚在MS＋1.0 mgo L-1 6-BA＋0.1 mg·L^-1NAA＋60 g·L^-1蔗糖的培养基上培养21 d后可转变为成熟体胚,成熟率45%;成熟体胚在添加1.0mg·L^-16-BA和0.5 mg·L^-1IBA的1/2 MS培养基上可萌发生根,培养30 d后生根率为68.2%。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献