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1 March 2006 CRYOPRESERVATION AND PLANT REGENERATION VIA SOMATIC EMBRYOGENESIS USING SHOOT APICAL DOMES OF MATURE PINUS ROXBURGHII SARG. TREES
RAVINDRA B. MALABADI, K. NATARAJA
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Abstract

The present investigation reports optimized parameters for somatic embryogenesis and cryopreservation of embryogenic cultures using shoot apical domes from mature trees of Pinus roxburghii Sarg. Embryogenic tissue of P. roxburghii Sarg. was cryopreserved for 24 h, 10 d, and 8 wk using sorbitol and dimethylsulfoxide (DMSO) as cryoprotectants. Results indicate that 0.2 M sorbitol and 5% DMSO had the best cryoprotecting effect. The recovered tissue showed luxuriant growth on maintenance medium (II). Partial desiccation of thawed embryogenic tissue for 24 h prior to transfer to maturation medium enhanced the maturation of somatic embryos. Maturation frequency increased from 1.3 to 18.3% after 12 h desiccation treatment, and from 18.3 to 61.8% after 24 h of desiccation. However, non-desiccated embryogenic tissue produced the least number of somatic embryos (1.3%) on the maturation medium with the same abscisic acid and Gellan gum concentration. All the three embryogenic lines produced plantlets and had the same appearance and normal growth as compared to unfrozen controls.

RAVINDRA B. MALABADI and K. NATARAJA "CRYOPRESERVATION AND PLANT REGENERATION VIA SOMATIC EMBRYOGENESIS USING SHOOT APICAL DOMES OF MATURE PINUS ROXBURGHII SARG. TREES," In Vitro Cellular and Developmental Biology - Plant 42(2), 152-159, (1 March 2006). https://doi.org/10.1079/IVP2005731
Received: 25 April 2005; Accepted: 1 June 2005; Published: 1 March 2006
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KEYWORDS
cryopreservation
Embryogenic tissue
Pinus roxburghii
shoot apical dome
somatic embryogenesis
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