Abstract
Ethylene, a gaseous plant hormone, is responsible for the initiation of reproductive development in pineapple. Reproductive development can be forced in pineapple (Ananas comosus var. comosus) throughout the year with ethylene. Inhibition of natural flowering initiation with aviglycine [(S)-trans-2-amino-4-(2-aminoethoxy)-3-butenoic acid hydrochloride], an inhibitor of ethylene biosynthesis, provides evidence that reproductive development in response to cold stress and short daylength is also in response to ethylene production. We studied the effect of cold treatment of pineapple on ethylene production and flower induction by applying a short-term cold stress to stem apices. Shoot apices of pineapple treated with ice crystals also produced twice as much ethylene as did those of control plants and significantly more than was produced by “D” leaf basal tissue. Moreover, pineapple plants treated four times with ice crystals or ice water were induced to flower under field conditions and the forcing efficiency, as evaluated by the percentages of inflorescence emergence and fruit harvest, was comparable to forcing with calcium carbide (CaC2) and ethephon. In another field experiment two applications of a 1.0% solution of CaC2 or 0.15% ethephon applied at 48 h intervals was sufficient to force reproductive development of ‘Tainon 17’. Furthermore, 0.5 or 1.0% solutions of CaC2 supplemented with 0.5% activated charcoal (AC) significantly improved the forcing effectiveness of CaC2. This could/would make it possible to reduce the number or concentration, or both, of CaC2 required to effect forcing in pineapple.
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Abbreviations
- AC:
-
Activated charcoal
- DAT:
-
Days after treatment
- GC:
-
Gas chromatography
- LSD:
-
Least significant difference
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Acknowledgments
We thank Dr. D.P. Bartholomew, University of Hawaii at Manoa, Honolulu, USA, for critical reading of the manuscript. This work was supported by the grants (NSC-96-2313-B-005-001 and NSC-95-2313-B-005-044-MY3) from National Science Council (Taiwan, ROC) to CHL.
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Maruthasalam, S., Shiu, L.Y., Loganathan, M. et al. Forced flowering of pineapple (Ananas comosus cv. Tainon 17) in response to cold stress, ethephon and calcium carbide with or without activated charcoal. Plant Growth Regul 60, 83–90 (2010). https://doi.org/10.1007/s10725-009-9421-9
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DOI: https://doi.org/10.1007/s10725-009-9421-9