Adventitious rooting of conifers: influence of physical and chemical factors
Adventitious rooting of conifers: influence of physical and chemical factors
复制标题
DOI：
10.1007/s00468-010-0488-8
复制
发表时间：
2010-09
期刊：
影响因子：
--
通讯作者：
C. Ragonezi;K. Klimaszewska;Mário Rui da Costa Basílio e Castro;M. Lima;P. Oliveira;M. A. Zavattieri
中科院分区：
文献类型：
--
作者：
C. Ragonezi;K. Klimaszewska;Mário Rui da Costa Basílio e Castro;M. Lima;P. Oliveira;M. A. Zavattieri
在针叶树中，营养繁殖的上级基因型是最直接的手段，使大的遗传增益，因为它允许大部分的遗传多样性被捕获在一个单一的选择周期。无性繁殖有两个目的，即选择基因型的大规模繁殖和从来自受控种子果园授粉的稀缺且昂贵的种子生产大量植物。在某些物种中，这可以通过生根的插条或生根的微芽来实现，后者通过体外组织培养再生。到目前为止，这两种策略都已使用，但往往取得有限的成功，主要是因为困难和低效的生根过程。在这篇技术综述中，我们着重于确定有助于针叶树插穗和微芽不定根发育的物理和化学因素的进展。这些因素包括植物生长调节剂，碳水化合物，光质，温度和生根基质/介质作为主要变量，为不同的针叶树种可靠的不定生根协议的发展。
In conifers, vegetative propagation of superior genotypes is the most direct means for making large genetic gains, because it allows a large proportion of genetic diversity to be captured in a single cycle of selection. There are two aims of vegetative propagation, namely large-scale multiplication of select genotypes and production of large numbers of plants from scarce and costly seed that originates from controlled seed orchard pollinations. This can be achieved, in some species, either through rooted cuttings or rooted microshoots, the latter regenerated through tissue culture in vitro. Thus far, both strategies have been used but often achieved limited success mainly because of difficult and inefficient rooting process. In this overview of technology, we focus on the progress in defining the physical and chemical factors that help the conifer cuttings and microshoots to develop adventitious roots. These factors include plant growth regulators, carbohydrates, light quality, temperature and rooting substrates/media as major variables for development of reliable adventitious rooting protocols for different conifer species.