An efficient procedure for the in vitro propagation and cryogenic conservation of Syzygium francissi was developed. The maximum number of shoots per explant was obtained on a Murashige and Skoog (MS) medium supplemented with 4.5 μM benzyladenine and 0.5 μM indole-3-butyric acid (IBA). The in vitro-propagated shoots produced roots when transferred to MS medium containing IBA, indole-3-acetic acid, or naphthaleneacetic acid at various concentrations. Rooted micro-shoots were transferred to a coco-peat, perlite, and vermiculite (1:1:1) mixture, and hardened off under greenhouse conditions. Ninety-five percent of rooted shoots successfully acclimatized in the greenhouse. Shoot tips excised from in vitro-grown plants were successfully cryostoraged at −196°C by the encapsulation–dehydration method. A preculture of formed beads on MS medium containing 0.75 M sucrose for 1 d, followed by 6 h dehydration (20% moisture content) led to the highest survival rate after cryostorage for 1 h. This method is a promising technique for in vitro propagation and cryopreservation of shoot tips from in vitro-grown plantlets of S. francissi germplasm.
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1 July 2004
IN VITRO PROPAGATION AND CRYOSTORAGE OF SYZYGIUM FRANCISSI (MYRTACEAE) BY THE ENCAPSULATION–DEHYDRATION METHOD
M. AWAD SHATNAWI,
KRYSTYNA A. JOHNSON,
FRASER R. TORPY
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In Vitro Cellular and Developmental Biology - Plant
Vol. 40 • No. 4
July 2004
Vol. 40 • No. 4
July 2004
Acclimatization
cryostorage
germplasm storage
in vitro preservation
In vitro rooting
Syzygium francissi