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IJEB Vol.44(09) [September 2006] >


Title: In vitro propagation of threatened terrestrial orchid, Malaxis khasiana Soland ex. Swartz through immature seed culture
Authors: Deb, Chitta Ranjan
Temjensangba
Keywords: Activated charcoal
Immature seed culture
In vitro hardening
Mass multiplication
Plant growth regulators
Issue Date: Sep-2006
Publisher: CSIR
Abstract: Rapid in vitro propagation of the terrestrial orchid, M. khasiana through immature seed culture was achieved. Immature seeds of 8-9 week after pollination (WAP) cultured on MS medium (2% sucrose) supplemented with 500 mgl-1 casein-hydrolysate and 1 M N6-benzyladenine (BA) exhibited germination of 75% seeds after 107 days of culture and subsequently supported the development of PLBs. Subsequent culture on MS medium enriched with 6 M of indole-3-acetic acid (IAA), 18 M each of BA and kinetin induced multiple shoots and plantlets. Transfer of PLBs to MS medium with 0.1% activated charcoal (AC) facilitated rapid proliferation of PLBs, while AC at 0.2% favored shoot bud induction and rhizome enlargement. The plantlets, developed on medium with IAA, BA and kinetin, after hardening in vitro for 8-10 weeks were planted in community pots and transferred to poly-house. The plantlets showed 65% survival under field conditions.
Page(s): 762-766
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Source:IJEB Vol.44(09) [September 2006]

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