Summary
This investigation disclosed that evaluation of tissue culture parameters of slowly developing species (e.g. Garcinia mangostana) requires monitoring of treatments through two or more successive, relatively long passages. Two 8-wk passages were necessary to observe differences in phytohormone effects. Photoperiod and temperature effects were not clearly evident until tissues had been cultured through three passages; the optimal photoperiod and temperature for shoot proliferation could not be established until after the fifth passage. Our investigation revealed that no auxin supplementation was necessary for bud primordium differentiation in cotyledon explants or proliferation of regenerated shoots. The optimum N6-benzyladenine concentration for primordium differentiation was 13.3 μM, and for shoot proliferation ranged from 4.4 to 13.3 μM. Continuous culturing in an 8-h photoperiod at 30°C resulted in progressively intensified degeneration of shoots after three passages. In contrast, successive passages in a 16-h photoperiod/26°C regimen enabled sustained regeneration of shoots. The shoots rooted at a rate of 85% when precultured for 3 d in a medium containing 4921.3 μM indole-3-butyric acid, or 10 d at 492.1 μM, then cultured for two 8-wk passages in phytohormone-free medium. Following acclimatization by gradually lowering the relative humidity in the growth chamber, rooted shoots survived transfer to the greenhouse at a rate of 95%.
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Huang, LC., Huang, BL., Wang, C.H. et al. Developing an improved In vitro propagation system for slow-growing species using garcinia mangostana L. (mangosteen). In Vitro Cell.Dev.Biol.-Plant 36, 501–504 (2000). https://doi.org/10.1007/s11627-000-0089-0
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DOI: https://doi.org/10.1007/s11627-000-0089-0