Journal
JOURNAL OF PLANT PHYSIOLOGY
Volume 162, Issue 4, Pages 473-478Publisher
ELSEVIER GMBH
DOI: 10.1016/j.jplph.2004.09.008
Keywords
conservation; Dendrobium nobile; micropropagation
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Successful shoot regeneration of Dendrobium nobile was achieved using thins shoot tip sections and triacontanol (TRIA) for the first time. Protocorm-like bodies (PLBs) or proliferating shoot buds were observed when thin shoot tip sections were cultured on the basal medium of Mitra et at. (Indian J. Exp. Biot. 14 (1976) 350) supplemented with 4.0 mu g L-1 TRIA. The highest percentage of explants (93%) produced PLBs or proliferating shoot buds (21) at 4.0 mu g L-1 TRIA-supplemented basal medium. All the newly formed PLBs or proliferating shoot buds survived and ultimatety produced healthy shoots with 2-3 leaves. Shoots produced roots when cultured on basal medium supplemented with 2.0 mu g L-1 TRIA. The well-rooted shoots were transferred to pots containing charcoal chips, coconut husk and broken tiles (2:2:1), and a 92% survival. rate was achieved. This work reveals that TRIA can be used as an effective growth regulator in the micropropagation and conservation of D. nobile. (c) 2005 Etsevier GmbH. All rights reserved.
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