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Use of Root Promoting Substances and Procedures: Why and How?

机译：使用根系促进物质和程序：为什么以及如何？

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摘要

A review of the basic plant physiological events occurring when a cutting is forming roots shows that first a wounding of the stem or leaf must take place. This wounding initiates among other an increased production of ethylene. During the last 70 years the activity of ethylene in the root initiation processes has been controversial and numerous contradictory reports have been published: ethylene enhances root formation, has no effect, or inhibits. Many of the differing results can be ascribed to methodological shortcomings: time of administration, controls, and presence or absence of preformed root initials in the plant material under investigation. It is now definitely proven, that ethylene is necessary, albeit in very minute quantities for the initial atypical cell divisions, which are a prerequisite for root initiation in cuttings (Boot et al., 2003). The effects of ethylene are of very short duration; higher concentrations and long time exposures are inhibitory. The probable mode of action for ethylene is to change the competence of some cells for receiving the auxin signal(s) (de Klerk, 2003).
机译：在切割形成根部时发生的基本植物生理事件的审查表明，必须举行茎或叶的伤口。这种伤口引发了乙烯的产量增加。在过去的70年中，乙烯在根起因过程中的活性已经存在争议，并且已经发表了许多矛盾的报告：乙烯增强根部形成，没有效果或抑制。许多不同的结果可以归因于方法论缺点：在调查中植物材料中的给药，对照和存在或不存在预先形成的根本。现在肯定被证明，乙烯是必要的，尽管是初始非典型细胞分裂的非常小的数量，这是切割中根起始的先决条件（Boot等，2003）。乙烯的影响非常短;较高的浓度和长时间的暴露是抑制性的。乙烯的可能作用方式是改变一些细胞的能力，用于接受疾病信号（S）（De Klerk，2003）。

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