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 x 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, SG[1]

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[3]Liaoning Acad Forestry Sci, Forestry Biotechnol & Anal Test Ctr, Liaoning 110032, Peoples R 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：;WOS:【SCI-EXPANDED(收录号:WOS:000327578000003)】；

基金：We are very grateful to Prof. Dr. YONGQI ZHENG for good suggestion and manuscript writing (Research Institute of Forestry, Chinese Academy of Forestry, China). We also thank http://www.textcheck.com/text/page/index for checking the manuscript, please see: http://www.textcheck.com/certificate/u6FsuB. This work was made possible by financial support from the National Science Foundation (30972393) and State 973 Plan (2009CB119100) of China.

语种：英文

外文关键词：anatomy; IBA; phytohormone ratio; adventitious roots; rooting capacity; Larix kaempferi x L. olgensis

摘要：Adventitious root development is crucial for cutting propagation in hybrid larch. In the present study, semi-lignified cuttings of Larix kaempferi x 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 X 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.