细胞分裂素

• Initiation of somatic cells stimulated by cytokinin , division of the initiated somatic cells and succeeding shoot meristem development are three key steps in the process
  细胞分裂素诱导体细胞启动、启动的体细胞进行分裂和由此引发的茎分生组织发育是这一过程中的3个重要步骤。
• Cytokinins move through the plant less readily than auxins or gibberellins and appear to move in opposition to auxins ? from root upward to shoot , not shoot downward to root
  细胞分裂素不像生长激素或者赤霉素那样容易移动，看起来他们和生长激素移动的方向相反? ?从根部到芽，而不是由芽到根部。
• Low concentration cylokinin can stop the decrease of chlorophyl content within waterlogged plant leaves and it produces a good result , but high concentration has no obvious result
  低浓度的细胞分裂素即可对受湿害植物叶片的叶绿素含量的下降产生明显的阻止效果，但高浓度时这种效果的加强不明显。
• A cdna labrary was constructed by using the floral meristem materials from the explants cultured on the medium containing hormones for 5 days and 10 days . screenings of cdna library was carried out by a microarray technique . two probes were used
  本研究利用风信子离体实验系统，从分离生长素和细胞分裂素诱导响应的基因着手，为初步理解两种激素在花发育过程中的作用机理提供新资料。
• Cotyledon and true leaves of stem mustard were cultured on ms medium supplemented with different concentrations of various cytokinins ( ba , cppu , tdz or kt ) alone or in combination with naa or iba , and the adventitious buds regeneration rate was evaluated .
  以榨菜子叶、真叶为外植体进行离体培养，用ba 、 cppu 、 tdz和kt等细胞分裂素和生长素naa 、 iba组合诱导子叶、真叶再生不定芽试验。
• Floral organs have been successfully induced from the regenerated floral buds of ffyacinthus orienralis l . by precisely controlling exogenous hormones in the medium . under high concentration of cytokinin and auxin , the regenerated floral bud produces only tepals
  以风信子花被片为外植体，通过控制培养基中细胞分裂素和生长素的浓度，可诱导花芽的再生和控制产生花器官的种类，建立起离体花器官定向控制系统。
• In this review three approaches in study of the effects of cytokinins on plant senecence are presented : the analysis of endogenous cytokinins during senescence ; the application of exogenous cytokinins ; and the research on transgenic plants with cytokinin biosynthesis or biodegradation genes
  主要从3个方面综述了细胞分裂素与植物衰老之间的关系，即： ( 1 )植物衰老过程中内源细胞分裂素含量变化： ( 2 )外源细胞分裂素的影响： ( 3 )转入与细胞分裂素的合成、降解相关的从因对植物衰老产生的影响。
• Bap performed more important function than kt in differentiation of tall fescue embryogenic calli , but better results could be achieved with combination of 2mg / l bap and 0 . 5mg / l kt . at this cytokinin level , 0 . 5mg / l naa was recommended to obtain the highest callus regeneration frequency . plant regeneration could be evidently boosted when embryogenic calli were pre - differentiated on high - osmoticum medium with 60g / l sucrose , and / or when the pre - differentiated compact calli were differentiated on differentiation medium solidified with l0g / l agar
  高羊茅胚性愈伤组织分化时， bap的作用要比kt大，但2mg lbap与0 . 5mg lkt配合可获得更佳的效果；在该细胞分裂素水平下，生长素naa用0 . 5mg l ，愈伤组织再生率最高；胚性愈伤组织先在含60g l蔗糖的分化培养基上高渗预分化，以及经高渗预分化后的致密愈伤组织在琼脂浓度为10g l的分化培养基上分化，能明显促进愈伤组织的植株再生；在分化培养基中添加脯氨酸导致愈伤组织再生率下降，但同时有减少白化苗再生的趋势。
• The cell division element class plant growth regulator is one kind of promotion plant being of ability to promote the vegetable cell fission and the variation , delay the leaf blade senescence , promote lateral bud growth , break the apical dominance , induce injuries of the organization , split up the different organs and promote chloroplast growth and synthesis
  细胞分裂素类植物生长调节剂是一种促进型植物激素，能够促进植物细胞的分裂和变异，延缓叶片衰老；促进侧芽发育，打破顶端优势；诱导愈伤组织，分化成不同器官；促进叶绿体的发育和合成。
• The results are as follows : exogenous hormones enhance hft gene expression . sequence alignment suggests hft ( hyacinthus forkhead transcription factor ) is a novel gene . its expressing level was enhanced by the hormones , and lower level were maintained in explants uncultured or cultured without hormones
  外源激素提高hft基因的表达水平， hft在外植体接种于含有生长素和细胞分裂素的ms培养基上培养24小时、 5天、 10天和15天的材料中均表达，并且其表达水平逐渐增高。