文章基本信息

标题：Simultaneous graft union and adventitious root formation during vegetative propagation in elepidote rhododendrons
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作者：Dace Megre ; Uldis Kondratovičs ; Kristīne Dokāne 等
期刊名称：Environmental and Experimental Biology
印刷版ISSN：1691-8088
出版年度：2007
页码：155-162
出版社：University of Latvia
摘要：Light microscopy was used to carry out a detailed study of cutting graft (graft ing on unrooted cuttings) in simultaneous graft union and adventitious root formation using elepidote rhododendron cultivars 'Cunningham's White' as rootstock and 'Catawbiense Grandi. orum' as scion. Th e fi rst visible reaction was the appearance of a necrotic layer in scion, rootstock and the base of rootstock, observed on day 2 aft er experimental initiation. Th e next observable reaction was callus formation from cells in the cambial region. Th e wound vascular cambium was fi rst recognizable on day 21, and the cambium bridge (a continued strand of wound vascular cambium in callus tissue) between rootstock and scion on day 30. Simultaneously, root initial formation from phloem ray was observed on day 30. Root initials di. erentiated into root primordias and they continued to develop till emergence at the surface of the rootstock base. Cutting graft is a quick propagation technique that reduces substantially time from unrooted cutting graft to fi eld plant. It may be useful as a method of rooting of varieties showing poor rooting potential
关键词：graft ing; rhododendron; rooting; vegetative propagation