0290919210
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  • AID0290919210
  • DOI10.1093/oxfordjournals.aob.a085753

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Article

Effects of irradiance and temperature on flowering of Chrysanthemum morifolium Ramat. in continuous light

Annals of Botany
527
Annals of Botany
Журнал с антэкологическими публикациями.
Oxford University Press · office@annbot.com

, 1979. V. 44. No. 4. P. 451–460
The short-day plant Chrysanthemum morifolium cv. Polaris initiated flower buds in all irradiances of continuous light from 7.5 to 120 W m−2. As the irradiance increased, the transition to reproductive development began earlier and the number of leaves initiated before the flower bud was reduced. The autumn-flowering cultivars Polaris and Bright Golden Anne, and the summer-flowering Golden Stardust were also grown in continuous light at different temperatures; all initiated flower buds at temperatures from 10 to 28 °C but only the buds of Golden Stardust developed to anthesis and then only at 10 and 16°C. Flower initiation began earliest at 16–22 °C, and the number of leaves formed before the flower bud was increased at 28°C. Golden Stardust was exceptional in that the number of leaves formed was also increased at 10 °C. Axillary meristems adjacent to the terminal meristem initiated flower buds rapidly at 10 °C but not at 28 °C in all three cultivars. These results are discussed in relation to the autonomous induction of flower initiation and the effects of the natural environment on flowering of chrysanthemum.

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