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This results seemingly indicate tnat the morphogenic potential of calli and 〓h〓 fo〓mation of abnormal shoots may be related to the degrees of the aber〓ation of chrome〓ome numbers.

这表明分化能力与染色体数的变异程度有关,另外中染色体数异常细胞的存在也许是一些发育成畸形苗的一个重要原因。

It,s allelchemicals were isolated through extraction, thin-layer chromatography, and column chromatograpathy. After the white clover was infused in ethanol and evaporation, the leavings was dissolved by water. The aqueous extract was extracted by petroleum,chloroform, ethyl acetate and n-Butanol successively, and the bioassay showed that the chloroform phase has obvious inhibitory effect, the inhibitory rate was 44.32%,88.08% on Abutilon theophrasti M., seedling length and root length, 82.08%,92.16% on Echinochloa crusgalli L., seedling length and root length, and the Amaranthus retroflexux L., germination rate is 0, the secondly was ethyl acetate phase.

运用萃取、薄层层析、柱层析等方法对白三叶草地上部分的化感物质进行初步分离,结果表明,白三叶草经乙醇浸提旋转蒸发后用蒸馏水溶解,依次用石油醚、氯仿、乙酸乙酯、正丁醇萃取,生物测定表明氯仿组分对杂草的抑制作用最强,对苘麻长和根长抑制率分别为44.32%、88.08%,对稗草长和根长的抑制率分别为82.08%、92.16%,反枝苋的发率为0;其次是乙酸乙酯相。

BA concentrations lower than 0.2 mg/L were favorable for the growth of adventitious sh...

高浓度BA有利于愈伤组织和的分化,低浓度则对的生长有利。

Buds can develop adventitiously on other parts of a plant and are sometimes a means of asexual reproduction.

可以在植物体的其他部分发生,不定有时也意味着一种无性繁殖。

The higher the concentration of Cefotaxime was, the lower the rate of differentiation was; when the concentration of Cefotaxime was high 400~500mgL^(-1, the growth of callus was inhibited. However, the effect of Carbenicillin on callus was little and the differentiation of adventive buds was promoted under appropriate concentration. When the Carbenicillin's concentration was 200mgL^(-1), the differentiation rate reached the maximum 68.8%.

头孢霉素浓度愈大,213品种不定分化频率愈低,当头孢霉素浓度较高400~500mgL^(-1时,愈伤组织生长受到抑制;而羧苄青霉素对愈伤组织影响很小,在适宜的浓度下能促进不定分化,213品种在羧苄青霉素浓度为200mgL^(-1)时,分化频率达到最大值68.8%。

The plant expression vectors were constructed and two genes were transferred into A. thaliana and N. tabacum, antikanamycin plants were obtained.4. The trials of adventive bud regeneration directly and callus induction was conducted to select out the optimal explants and formula. The results revealed that double scale can produce 13~16 adventive buds per centimeter in MS medium added 10.0 mg/L 6-BA, 1.0 mg/ L NAA, 40 g/L sugar and 7.5 g/L agar. Scale, leaves, scape and different tissue of flower can be induced to produce callus in appropriate medium, but the filament with anther was the optimized explant.

构建了两个基因的pBI121和pCAMBIA1300植物表达载体,并通过农杆菌将上述基因转入烟草和拟南芥中,得到了卡那抗性的再生植株。4、以中国水仙不同部位外植体进行了不定直接分化和愈伤组织诱导分化试验,结果表明,双鳞片外植体在MS0+6-BA 10.0 mg/L+NAA 1.0 mg/L+蔗糖40 g/L+琼脂7.5 g/L培养基上可以大量地直接再生,再生数量平均可达13~16个/cm双鳞片,比传统的鳞茎盘之间分化提高30~50%;鳞片、叶片、花葶及花部不同组织在适宜的配方中均可不同程度地诱导出愈伤组织,但以带花药的花丝诱导出的愈伤组织最好。

Effects of Hg2 on agamogenesis of Egeria najasWhen Hg concentration was above 1.50mg/L, leaf of shoot fragment faded severely, compared to the control even the sprout also faded much.

Hg2 浓度l 。oom留L实验组中的侧枝新长度随着Hg2 浓度的增加而缩短,平均新长度在】。ocm以下。

Effects of explants,2,4-D,6-BA,NAA and AgNO3 on inducing buds were studied in pineapple(Ananas comosus cv.Hawaii) by using orthogonal design.

采用菠萝试管苗的叶片、叶鞘、茎段和茎薄片作外植体,以MS或1/2 MS为基本培养基,应用正交试验设计方法研究了不同浓度的2,4-D、6-BA、NAA和AgNO3对夏威夷菠萝不定的诱导效果,并在添加不同激素组合的培养基中进行的增殖和生根培养研究。

In contrast to that a single tiller is usually formed in each leaf axil of wild-type plants, there are two tillers in leaf axils of some transgenic plants.

这说明MOC1基因除了控制腋生分生组织的起始和分蘖的形成以外,还具有促进分蘖的生长发育的功能。

Morphological and anatomical studies revealed that there are no axillary meristem and tiller bud in the leaf axil of moc1 mutant plants. Therefore, we predict that MOC1 gene is required for axillary meristem initiation and tiller bud formation.

组织解剖学的观察表明,在moc1突变体的叶腋里没有腋生分生组织和分蘖,因此推测MOC1基因是腋生分生组织的起始和分蘖的形成所必需的。

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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

The shamrock is the symbol of Ireland and of St.

三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。