Abstract
The level of ethylene accumulated in morphogenic callus cultures of Heliconia psittacorum L.f. was only one quarter that of non-morphogenic cultures. The rate of ethylene production in the morphogenic callus cultures during early stages of differentiation of protocorm-like bodies leading to plantlet regeneration was 10-fold higher than that during callus proliferation. In cultures sealed with gastight serum caps, fresh weight gain was reduced 2-to 3-fold compared to those that were closed with Kaputsℜ. Treatment with 1-aminocyclopropane-1-carboxylic acid (≥ 100 μM) caused complete inhibition of plant regeneration from the morphogenic callus on subsequent culture under inductive conditions. Silver nitrate and aminoethoxyvinylglycine also reduced plant regeneration. These results indicate that while high levels of ethylene were inhibitory, a low level of endogenous ethylene production may be necessary during the plant regeneration phase in callus cultures of Heliconia.
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Abbreviations
- 2,4-D:
-
2,4-dichlorophenoxyacetic acid
- AC:
-
activated charcoal
- ACC:
-
1-aminocyclopropane-1-carboxylic acid
- AVG:
-
aminoethoxyvinylglycine
- BM:
-
basal medium
- CH:
-
casein hydrolysate
- DM:
-
development medium
- MM:
-
maintenance medium
- PLB:
-
protocorm-like body
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Kumar, P.P., Nathan, M.J. & Goh, C.J. Involvement of ethylene on growth and plant regeneration in callus cultures of Heliconia psittacorum L.f.. Plant Growth Regul 19, 145–151 (1996). https://doi.org/10.1007/BF00024581
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DOI: https://doi.org/10.1007/BF00024581