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primary development
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  初始发展
    The Origin and Primary Development of Millet Cultivation in Shanxi
    山西谷子(粟)栽培起源与初始发展
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    During the process of protonema development,1.0 mg/L NAA can promote the primary development of protonema significantly,and 0.4 mg/L TDZ promotes branches formation in intermediate stage of the protonema development.
    (2)在原丝体发育阶段,1.0 mg/LNAA对原丝体初期的发育促进效果显著,0.4 mg/L TDZ对原丝体发育中期分枝的形成促进效果显著,6-BA处理效果不显著;
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  primary development
Specifically, Ghanian adults more often see drinking water provision as their primary development need when water sources are distant and/or when male household members collect water (particularly male heads).
      
are characterized by broad cortex and narrow stele during the primary development.
      
This supports the hypothesis that the primary development of transitory olfactory connections represents an ontogenetic recapitulation of ancestral conditions, by which the structural and functional organization of the avian brain is influenced.
      
Intrinsic and extrinsic factors in the primary development of the skeleton
      
The primary development of clinical resistance to 1-β-d-arabinofuranosyl cytosine (ara-C) in leukemic blast cells is expressed as decreased cellular concentrations of its active anabolite.
      
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The cotton fiber cells are initiated from the individual epidermal cells of ovule. During the development, the cotton fiber cell only grows but does not divides,so it is a kind of model material for studying the mechanism of plant cell growth and development.In recent years,a number of functional genes playing important roles in the primary development of cotton fiber cell were isolated and their expression and regulation characters were illuminated, which not only is helpful for the understanding of the...

The cotton fiber cells are initiated from the individual epidermal cells of ovule. During the development, the cotton fiber cell only grows but does not divides,so it is a kind of model material for studying the mechanism of plant cell growth and development.In recent years,a number of functional genes playing important roles in the primary development of cotton fiber cell were isolated and their expression and regulation characters were illuminated, which not only is helpful for the understanding of the molecular mechanism of plant cell differentiation and cell elongation,but also enhances the practice of genetic engineering in improving the cotton fiber qualities.

棉纤维细胞是由胚珠的部分表皮细胞经分化突起发育而成的,在整个生长发育过程中棉纤维细胞只生长不分裂,是一种很好的研究植物细胞生长发育机理的模式材料.近年来国内外不少研究者已经分离出一批对棉纤维初生生长发育有重要作用的功能基因,并阐明了这些基因的表达及调控特征.这些基因的分离和鉴定不仅有助于阐明植物细胞分化和伸长发育的分子机理,而且还可以促进棉纤维品质改良遗传工程的开展.

Based on the tissue culture,the effect of N-phenyl-N'-1,2,3-thiadiazol-5-ylurea(TDZ),6-benzyla minoprine(6-BA) and 1-Naphthylacetic acid(NAA) on spore germination,protonema development and bud differentiation in Entodon challengeri was investigated in this paper.The whole process was observed and taken pictures.The results show that TDZ,6-BA and NAA have no significant effect on the spore germination.During the process of protonema development,1.0 mg/L NAA can promote the primary development of protonema...

Based on the tissue culture,the effect of N-phenyl-N'-1,2,3-thiadiazol-5-ylurea(TDZ),6-benzyla minoprine(6-BA) and 1-Naphthylacetic acid(NAA) on spore germination,protonema development and bud differentiation in Entodon challengeri was investigated in this paper.The whole process was observed and taken pictures.The results show that TDZ,6-BA and NAA have no significant effect on the spore germination.During the process of protonema development,1.0 mg/L NAA can promote the primary development of protonema significantly,and 0.4 mg/L TDZ promotes branches formation in intermediate stage of the protonema development.The number of bud increases with the concentrations augmentation of the three growth regulators,but it is better under 0.4 mg/L TDZ.And it is the best effect when 1.5 mg/L 6-BA and TDZ is mixed.The bud quantity isn't correlated directly with its growing trend.

研究了3种植物生长调节剂苯基噻二唑基脲(TDZ)、6-苄基腺嘌呤(6-BA)、萘乙酸(NAA)对密叶绢藓[Entodon challengeri(Paris)Cardot]孢子萌发、原丝体发育及芽体发生的影响,并对整个发育过程进行了显微观察和照相,结果表明:(1)3种植物生长调节剂对密叶绢藓孢子萌发影响不显著;(2)在原丝体发育阶段,1.0 mg/LNAA对原丝体初期的发育促进效果显著,0.4 mg/L TDZ对原丝体发育中期分枝的形成促进效果显著,6-BA处理效果不显著;(3)3种植物生长调节剂单独处理均促进芽体的发生,但0.4 mg/L TDZ效果最佳。而1.5 mg/L 6-BA+TDZ组合处理效果更加显著;(4)芽体的发生数量与芽体的长势无正相关性。

 
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