文献类型：期刊文献

英文题名：Anatomical and physiological effects of phytohormones on adventitious roots development in Larix kaempferi × L. olgensis

作者：Han, H.[1] Sun, X.M.[1,2] Xie, Y.H.[2] Feng, J.[3] Zhang, S.G.[1,2]

第一作者：Han, H.

通信作者：Zhang, S.G.

机构：[1] State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Xiangshan Rd., Beijing, 100091, China; [2] Research Institute of Forestry, Chinese Academy of Forestry, Xiangshan Rd., Beijing, 100091, China; [3] Forestry Biotechnology and Analysis Test Center, Liaoning Academy of Forestry Sciences, Chongshan Rd., Liaoning, 110032, China

年份：2013

卷号：62

期号：3

起止页码：96-104

外文期刊名：Silvae Genetica

收录：EI(收录号：20140517253526);Scopus(收录号：2-s2.0-84892989549)

语种：英文

外文关键词：Butyric acid - Physiology

摘要：Adventitious root development is crucial for cutting propagation in hybrid larch. In the present study semilignified cuttings of Larix kaempferi × L. olgensis clones were used to study the morphological and anatomical changes during the different development stages and compare the changes in contents of endogenous phytohormone in two clones with evidently different rooting capacity (25-5 and 23-12), and the effects of exogenous Indole-3-Butyric Acid (IBA) on phytohormone content of a very low native rooting capacity clone (8-9) during the development of adventitious roots. The results showed that the development of adventitious root in semi-lignified cuttings involves three key stages: root cell dedifferentiation and division (14-18 DAC); meristem formation and development (25-35 DAC); root formation and elongation (50-55 DAC). The endogenous phytohormones play a key role during adventitious root development. For 25-5 and 23-12, the level of endogenous phytohormones, especially the ABA content, has an important effect on rooting capacity. For the effects of IBA on 8-9, except lower ABA content, the temporary peak of IAA on the 1 DAC was important for initiating the rooting process. The ratio of (IAA + GA 3+ ZR)/ABA can be used as an indicator of rooting capacity. The anatomical and physiological data described here for semi-lignified cuttings of L. kaempferi × L. olgensis clones improves our knowledge of adventitious roots development. Our study will also benefit future research on examining the molecular mechanisms of the adventitious roots development in hybrid larch.