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In anther culture of Panax ginseng, its callus formation showed a wide adaptability to culture media. Large numbers of calli were induced on media exhibiting better effects of induction. Supplemeres of 5 mg 2,4-D/1 and 1 mg KT/1 to the media proved to be much effective. Regeneration of the whole plantlets from anther culture of Panax ginseng is usually quite difficult. During the past three years, however, sixteen of the 100 medium formulae tested were proved to be suitable. The formulae of MS+0.5 mg BA/1+2 mg GA/1+1000 mg LH/1+3% sucrose were considered good and effective. A visibly differentiated body, which was light-milky white and later turned into a light green spot, was formed 40 days after the callus was transferred to the differentiation media. This body differentiated subsequently into buds, roots and, eventually, seedlings. The embryoid clones have been established in order to maintain its ability of continual differentiation into plantlets through successive culturings of many generations. 相似文献
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本文对具有不同裂纹尺寸的中心裂纹LY12板试样在动、静态拉伸加载条件下,分别进行了断裂实验研究,得到了名义断裂应力与板的初始裂纹长度间的关系。通过对动、静态实验结果的比较,得到在动、静态拉伸加载条件下某些参量间的相互关系。 相似文献
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