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1.
In vitro regeneration of complete plants from nodal single-bud segments of 2-year-old Australian Cedar (Toona ciliata) trees were obtained under defined nutritional and environmental conditions. Explants were dissected from plants obtained by germination of seeds and growth in pots in a greenhouse. The best medium for shoot regeneration was that of Murashige and Skoog at 1/4 strength with 3% sucrose (1/4 MS), supplemented with 0.1 mg/l IBA and 0.5 mg/l BAP. Rooting of regenerated shoots was observed in MS medium with 0.1 mg/l IBA. Using mature tree material was more difficult. Forced flushing was used to induce shoot development on branches of a 10-year-old tree. Nodal segments of these epicormic shoots formed shoots in vitro on 1/4 MS + 0.01 mg/l IBA + 5 mg/l BAP, but rooting was never observed. 相似文献
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以杜仲为材料,进行了带芽茎段的离体快速微繁殖研究。结果表明:以成年树带芽茎段作为外植体进行繁殖,每年以4,5月所取外植体萌发最好(萌发率达90%以上),且枝条中部和顶部腋芽的萌发效果较基部要好。以MS附加0.1 mg/L 6-BA培养基作为腋芽诱导培养基,以MS附加2.0 mg/L 6-BA和0.05 mg/L NAA培养基为继代增殖培养基较为适宜,以1/2MS附加1.5 mg/L IBA和20 mg/L蔗糖(S)培养基诱导生根,生根率达90%。 相似文献
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Tests were conducted to assess rootability of red alder softwood cuttings from shoots of young trees and epicormic sprouts of mature individuals. Ortets were 3 to 34 years old, and treatments with and without indole-3-butyric acid (IBA) were compared. The extent of rooting and root vigor on the cuttings varied greatly among ortets and treatments. Among nonterminal cuttings, the best overall rooting success, with and without IBA, was obtained with cuttings of the youngest ortet. Average rooting of terminal and nonterminal cuttings of one clone were 100% and 64%, respectively. Although cuttings of some trees rooted well without IBA, the IBA treatment appeared to be generally beneficial. For all nonterminal cuttings of all clones, best results (80.0%/x) were obtained with a 10-sec dip in 2,000 or 4,000 ppm IBA. Vigorous planting stock was obtained from the rooted cuttings of all clones. Using epicormic sprouts from mature trees of proven performance will presumably allow propagation of superior trees and establishment of new plantations with improved stock. 相似文献
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Rooting of baldcypress cuttings 总被引：6，自引：0，他引：6
A test of the rooting performance and growth of cuttings from 1-year-old and 25-to 50-year old baldcypress (Taxodium distichum L.) branch tips is reported. Rooting of cuttings from one-year-old trees averaged 75% (0.1% IBA treatment) and 88% (control), cuttings from 25 to 50-year-old trees averaged 12% in both the IBA treatment and the control treatment. Indole-3-butyric acid at a 0.1% concentration did not enhance rooting, but resulted in a significant increase in shoot dry weight on cuttings from one-year-old trees. The results of this experiment suggest that cuttings from mature baldcypres trees have the potential to root, thereby, additional rooting techniques such as girdling and stump sprouts is worthy of pursuing. 相似文献
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为建立银叶金合欢（Acacia podalyriifolia）组培快繁技术体系,本文对其外植体类型的选择与灭菌处理方法以及不定芽诱导、增殖和生根培养基进行了优化筛选。结果表明,组培最适外植体为半木质化枝条上部;灭菌处理方式以75%酒精（10 s）＋0.1%升汞（5 min）为宜,其污染率为38.67%,诱导率达54.33%;最适宜诱导培养基为MS+6-BA 0.5 mg?L-1+ IBA 0.01 mg?L-1 + GA3 0.3 mg?L-1,诱导率为64%;最佳增殖培养基为MS+6-BA 0.6 mg?L-1+ IBA 0.05 mg?L-1+ GA3 0.1 mg?L-1,增殖系数为3.44;最佳生根培养基为l/4 MS+NAA 0.2 mg?L-1+ IBA 0.8 mg?L-1,生根率为67.1%;移栽基质为黄心土+沙（V黄心土：V沙=2:1）,移栽成活率可达85%以上。 相似文献
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An efficient protocol has been developed for in vitro propagation of Enicostema axillare using shoot tip explants. The shoot tip explants were cultured on MS medium supplemented with various combinations of (BAP, KIN) and (NAA/IAA & IBA) in different concentrations between 0.5 and 2.0 mg/l for multiple shoot bud induction. The highest percent of (98.51 %) was observed at 1.0 mg/l BAP in combination with 0.2 mg/l KIN while maximum number of shoot buds (8.41 shoots/explant) was noticed on MS medium containing 1.0 mg/l BAP and 0.2 mg/l KIN combination. The highest frequency (90.82 %) of multiple shoot bud regeneration was observed at 1.0 mg/l BAP and 0.5 mg/l IBA with 15.12 ± 2.12 shoots/explants. The regenerated multiple shoots were transferred to half-strength MS medium augmented with different concentration of 0.5–2.5 mg/l IBA for rooting. Among the different concentrations of IBA tested, maximum percentage of rooting (100 %) was observed in MS medium augmented with 1.5 mg/l IBA. The rooted plantlets were successfully transferred into plastic cups containing soil and sand in the ratio of 1:1. Subsequently established in the field conditions with 90 % of survival rate. The protocol developed can be utilized for both large scale plant production and conservation of germplasm of this species. The described method can be successfully employed for large-scale multiplication and in vitro conservation as well as production of secondary metabolites of E. axillare. 相似文献
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北美鹅掌楸组培快繁技术体系的建立 总被引：1，自引：0，他引：1
通过北美鹅掌楸(Liriodendron tulipifera)种子诱导的无菌苗茎段,建立北美鹅掌楸的组培快繁体系,种子接种10d后开始萌动,实验的4种培养其中,最好的培养基是MS+3%蔗糖,种子萌发率达38.4%;MS+6-BA1.0mg/L+NAA0.1 mg/L是最好的外植体分化培养基,其增值率达2.04倍;小芽丛在MS+6-BA0.5 mg/L+NAA0.05mg/L上外植体分化数最高,达2.45倍,芽茁生长较好;芽苗在1/2MS+IBA0.5 mg/L+NAA0.1 mg/L生根培养基上,13 d后开始生根,生根率最高达66.7%,炼苗移栽20 d后苗木成活率达80%以上. 相似文献
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云南楤木组织培养快速繁殖试验 总被引：6，自引：0，他引：6
利用组织培养技术对云南木进行了组培快繁技术研究。筛选出适合云南木组培各阶段的适宜激素浓度和配比,分别为:启动培养基MS+6-BA 0.18mg/L+IBA 0.4mg/L;增殖培养基MS+6-BA1.2 mg/L+IBA 0.5mg/L;生根培养基1/2MS+IBA 3.0mg/L。并阐明了继代次数与增殖系数和生根率的关系,提出云南木继代次数以8代左右为宜,8代之后应进行生根培养。 相似文献
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非洲菊试管苗生根培养试验 总被引：3，自引：0，他引：3
非洲菊试管苗继代培养基中高质量浓度的细胞分裂素可抑制根的诱导；生根培养基中适量的生长素能促进根原基的分化和生长，蔗糖和无机盐质量浓度也影响生根的效果。以MS BZ1.0mg/L IAA0.1mg/L培养基上增殖的芽在1/2MS IBA0.01mg/L上培养，供试品种生根率在15d内达均到100%，且幼苗生长健壮，移出试管后经过适当的锻炼，成活率达到100%。以市售白糖和自来水代替蔗糖和去离子水，以河沙代替琼脂试验均取得了良好的效果。 相似文献
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本试验采用无菌落雪泥为材料,分别对试管苗诱导、增殖和生根条件进行了初步研究。结果表明：诱导叶片分化的最佳培养基为：MS＋6-BA2．0mg／L＋NAA0．2mg／L;最适的增殖培养基是MS＋6-BA2．0mg／L＋NAA0．1mg／L;生根的培养基：1／2MS＋IBA0．4mg／L。在自动控制温室中,落雪泥始终处于高湿度、恒温环境中,草炭土是最适宜移栽的基质。在简易大棚中,落雪泥生活在湿度、温度不恒定的环境中,珍珠岩是最适宜移栽的基质,生根苗有100％的成活率。本试验为农民产业化生产落雪泥提供了理论依据和技术支持。 相似文献
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为加快金心扶芳藤在园林绿化中的应用,以其带腋芽的茎段为材料,筛选其初代、增殖及生根培养基,建立组培快繁技术体系。结果表明:金心扶芳藤较适宜的初代诱导培养基为MS+BA 1.0 mg/L+IBA 0.05mg/L,芽的诱导率达96.0%;较适宜的增殖培养基为MS+BA 5.0 mg/L+IBA 0.08 mg/L+NAA 0.06 mg/L,芽的增殖系数达3.9;较适宜的生根培养基为1/2MS+IBA 2.0 mg/L,苗木生根率达100%,平均根数7.8条,根长4.5 cm。 相似文献
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以窄冠白杨优良无性系"HN-1"的幼嫩茎段为外植体,探索了丛生芽增殖、生根及移栽适宜条件,建立起组织快繁技术体系,研究结果表明:MS培养基可作为HN-1丛生芽增殖的基本培养基,细胞分裂素6-BA浓度为0.3mg/L时对丛生芽增殖的作用显著;适宜的增殖培养基为MS+6-BA 0.3mg/L+NAA 0.1mg/L+IBA 0.1mg/L+IAA 0.15mg/L;适宜的生根培养基为1/2MS+NAA 0.1mg/L+IBA 1.0mg/L;培养条件采用正常光照生根效果最好,生根率达71.1%;适宜的移栽基质为草炭、黄土、细沙容积比1∶1∶1,移栽苗成活率达93.8%。 相似文献
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以托柄菝葜幼嫩的茎段为外植体,MS、1／2MS、1／4MS、B5为基本培养基,研究了不同植物激素组合对托柄菝葜组织培养快速繁殖的影响。试验结果表明,不同培养阶段的适宜培养基为:(1)启动培养基为1／2MS 6-BA 2．0 mg／L IBA 0．1 mg／L;(2)继代增殖培养基为1／2MS 6-BA 3．0 mg／L IBA 0．2 mg／L,月平均芽增殖率可达 177．8％;(3)生根培养基为1／4MS NAA 1．5 mg／L 活性炭1 000 mg／L,培养25 d后生根率可达93．3％。 相似文献
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铁皮石斛组培育苗与组培苗培植技术研究 总被引：1，自引：1，他引：0
对铁皮石斛组织培养育苗和组培苗培植技术进行研究,结果表明:在MS培养基中添加6-BA 1.0mg/L+NAA 0.1 mg/L+IAA 0.5 mg/L+50 g/L椰子汁有利于芽苗的增殖;在1/2MS培养基中添加6-BA0.1 mg/L+IBA 1.0 mg/L+NAA 0.2 mg/L+50 g/L椰子汁有利于小苗生根和植株生长。搭建大棚移植铁皮石斛组培苗,采用高架苗床,选用松树皮和花生壳(v/v=4∶1)为基质,移栽成活率可达95%以上。 相似文献
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Vegetative propagation techniques are recognized as indispensable tools for mass multiplication of important multipurpose
trees adopted in different agroforestry systems. Albizia procera, one among important species, is difficult to propagate commercially either by stem / root cuttings or layering. A study
was undertaken to develop procedure for its in vitro regeneration through organogenesis. Explants collected from 15±2 yr-old mature plus trees and from 15 days old juvenile seedlings
were regenerated with exogenous application of different hormones. Epicotyl and hypocotyl explants excised from juvenile seedlings
showed higher callusing than axillary bud and shoot tip explants derived from mature trees. Benzylaminopurine (BA) at 3 μg/l
was most effective, which induced hundred percent callusing in epicotyl and hypocotyl explants in 1/2 Murashige and Skoog
(MS) medium. Callus originated from axillary buds and apical shoot tips of mature trees failed to form organs, however callus
derived from epicotyl and hypocotyl explants proliferated and formed de novo shoots and leaflets. A concentration of 3 μg/l of BA was found effective for shoot proliferation. Shoots grew vigorously
in 2 μg/l gibberellic acid (GA3) treatment and rooted in 1/2 MS medium supplemented with indole-3-butyric acid (IBA) and indole-3-acetic acid (IAA). Rooting
was most successful on medium supplemented with 6 μg/l IBA alone on which 93.3% of the shoots formed roots. Sand or vermiculite
supplemented with 4 ml of yoshida solution proved as best hardening media, which recorded 70-80% survival of plantlets. One
year old tissue culture raised plants had comparatively more height, collar diameter, biomass, and root shoot ratio than plants
raised from cuttings and seeds of the same age. The procedures enumerated provide a basis for the development of in vitro techniques for rapid multiplication of A. procera.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献