共查询到20条相似文献，搜索用时 453 毫秒
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为降低"欧宝1617"小黄瓜种植的种苗成本,对"欧宝1617"小黄瓜的腋芽再生组织培养技术进行了研究.适合"欧宝1617"小黄瓜种子苗的茎尖和试管苗单茎节段的腋芽生长增殖的最佳培养基为MS+IBA(0.2～0.5)mg/L在30 d继代周期内能以7倍增殖."欧宝1617"小黄瓜试管苗驯化移栽的最佳基质为上面1/3蛭石下... 相似文献
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为降低＂欧宝1617＂小黄瓜种植的种苗成本,对＂欧宝1617＂小黄瓜的腋芽再生组织培养技术进行了研究.适合＂欧宝1617＂小黄瓜种子苗的茎尖和试管苗单茎节段的腋芽生长增殖的最佳培养基为MS＋IBA（0.2~0.5）mg/L,在30 d继代周期内能以7倍增殖＂.欧宝1617＂小黄瓜试管苗驯化移栽的最佳基质为上面1/3蛭石下面2/3腐质土的双层基质法. 相似文献
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王会 《襄樊职业技术学院学报》2006,5(3):11-12,27
以红实美草莓匍匐茎剥取茎尖，不同大小茎尖接种到不同配方的茎尖诱导培养基中。实验结果表明：0．5mm大小茎尖在培养基MS＋6-BA0．5mg／ml＋KT1．0mg／ml上成活率最高，达到80％，并且其中87．5％可以不经过愈伤而直接成芽：转接到Ms＋6-BA0．5mg／ml培养基上增殖效果最好，增殖系数达6．8；再生芽转接到生根培养基1／2MS上，培养15d，生根率达100％，平均生根6．4条／株；生根试管苗在国土／煤渣=2／1的基质中驯化，成活率高达100％．苗生长健壮。 相似文献
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以玫瑰茎尖为外植体进行组织培养试验研究结果表明：玫瑰茎尖在MS＋6BA1mg／L＋NAA0．1mg／L＋3％白糖＋0．4％琼脂的培养基中芽的诱导率高达98％；在MS＋6-BA2mg／L＋NAA0．01mg／L＋3％白糖＋0．4％琼脂的培养基中增殖倍数可达6，且苗壮；在1／2MS＋IBA0．5mg／L＋0．3％活性炭＋3％白糖＋0．4％琼脂培养基中根系生长丰富且健壮，诱根率高达100％；试管苗移栽基质为珍珠石＋腐殖土，成活率达98%． 相似文献
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芋是世界上广为栽培的蔬菜和粮食兼用作物。近年来,其病毒感染率不断升高,使得种芋退化、产量和品质不断下降。茎尖脱毒、无病毒苗快繁及三级良种繁育是建立芋脱毒种苗体系的"三部曲"。本试验对影响芋脱毒试管苗移栽的最适基质进行了探讨与选择,认为蛭石-土各50%混合土壤为芋试管苗最适栽培基质,为试管苗的大规模移栽提供理论依据。 相似文献
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以甜叶菊茎段为外植体、MS为基本培养基,研究了消毒剂70％酒精和0．1％升汞的不同时间处理组合的灭菌效果和对试管苗再生的影响,同时还探讨了不同种类、不同浓度植物生长调节剂对试管苗增殖、生根及移栽的影响。结果表明,70％酒精处理15-30s＋0．1％升汞处理4m较为适合茎段外植体灭菌,污染率低、苗再生率高;6-BA与NAA组合的试管苗增殖系数比KT、Ad与NAA组合要高,培养基中添加1．0mg／L6-BA＋0．1-0．2mg／LNAA植物生长调节剂组合适合试管苗增殖,增殖系数可达7．4;培养基中添加0．0-0．5mg／L的IBA或NAA均适合试管苗生根,生根的试管苗移栽成活率较高。 相似文献
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江永香芋的组织培养研究 总被引：2，自引：0，他引：2
黄光文 《湖南科技学院学报》2006,27(11):189-190
连续3次茎尖剥离并经病毒唑处理，得到了江永香芋的脱毒试管苗．脱毒苗在添加芋块煮沸滤液的MS＋6-BA4．0mg／L＋NAA0．05mg／L培养基上培养，繁殖系数4～6，而1／2MS＋0．5mg／LNAA＋0．05mg／L 6-BA＋0．2％活性炭培养基适于生根。 相似文献
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我曾在农科部门工作,现为贵刊1997年第9期“马铃薯茎尖脱毒组培”一文作些补充。马铃薯病毒是长期影响马铃薯生产的主要原因。目前,国内用马铃薯茎尖脱毒培养无病毒试管苗,再种植获得脱毒种薯,已大大提高了马铃薯的产量。这一方法的工艺流程包括室内和室外两部分。室内主要通过茎尖脱毒经组织培养后获得脱毒苗,室外主要将试管苗移栽到苗圃,获得种薯。这一方法中,对苗圃建设要求较严格,且涉及试管苗成活率问题。马铃薯结薯的条件是先长出气生根,气生根在黑暗条件下,诱导结薯。利用这一原理,将试管苗移栽到室外苗圃获得种薯这一环… 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,(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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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
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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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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 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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GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献