บทคัดย่องานวิจัย

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Environmental control of anthesis in Metrosideros excelsa (Myrtaceae).

Henriod, R.; Jameson, P. E.; Clemens, J.;

Acta Horticulturae Year: 2001 Issue: No. 543 Pages: 107-110 Ref: 7 ref.

2000

บทคัดย่อ

Environmental control of anthesis in Metrosideros excelsa (Myrtaceae).

The aim of this study was to investigate the role of environmental factors in floral development of M. excelsa, a species currently being trialed as a highly ornamental container plant. M. excelsa cultivars Vibrance, Scarlet Pimpernel and Mistral were grown in greenhouses under ambient summer conditions using a factorial combination of two levels of photoperiod (ambient daylength or daylength extended to 16 h) and temperature (ambient temperature or warm: 21/14 deg C) until plants reached anthesis. Quantitative measurements were conducted on a weekly and daily basis examining changes in inflorescence size and rates of development. Rates of floral development were significantly increased under the controlled warm treatments versus ambient temperature conditions. An environment with warm temperatures and ambient daylength provided the optimum conditions for extended life of inflorescences. The size of inflorescences and vegetative shoots arising from inflorescences was significantly affected by th

e main effects of daylength and temperature, respectively. The results of this study successfully provided an environmental method for controlling anthesis in this species.