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| Effect of Temperature on Flower Induction of Phalaenopsis amabilis |
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| DOI：10.16768/j.issn.1004-874X.2020.09.006 |
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| Abstract: |
| 【Objective】The experiment was to explore the appropriate temperature for the infarction of Phalaenopsis amabilis in order to provide basis for production management and provide references for varieties that have difficulty in flower induction as well as low temperature substitution.【Method】Taking the ‘fire phoenix’ P. amabilis bag seedlings as test materials, under the condition of artificial climate box, the single-factor randomized group was adopted as experiment design method. Five temperature treatments were set: 29/22℃, 26/19℃, 23/16℃, 20/13℃ and 17/10℃（day/night）. The temperature difference in each treatment was 7℃, the photoperiod was 10h/14h and the relative humidity was 75%.【Result】The P. amabilis had the earliest infarction time under the treatment at 26/19℃, and it started the infarction after being treated for 30 days, with the infarction rate of 100% and the infarction index of 14.86. The infarction started after treatment at 23/16℃ for 36 days, with the infarction rate of 100% and the infarction index of 2.41. The infarction started after treatment at 20/13℃ for 40 days, with the infarction rate of 95% and the infarction index of 1.13. The contents of soluble sugar, soluble protein and malondialdehyde increased significantly before infarction at 20-26℃, and decreased significantly after infarction. SOD activity increased before infarction.【Conclusion】The optimum temperature for the infarction of P. amabilis was 26/19℃. The inflorescence axis was not extracted at 29/22℃, indicating that P. amabilis could not induce flowering under high temperature conditions. The treatment at 17/10℃ caused low temperature damage. After a period of incubation, the pedicels could be extracted by being transfered to a higher temperature, but the quality of the pedicels was deviated. |
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