Adaptation of Chrysanthemum morifolium to low light levels |
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| Affiliation: | 1. Department of Soil Science, Faculty of Agriculture and Natural Resources, University of Tehran, Tehran, Iran;2. Horticulture Major, Division of Applies Life Science (BK21 Plus Program), Graduate School, Gyeongsang National University, Jinju, Republic of Korea;1. Fresh Produce Research Centre, Harper Adams University, Newport, Shropshire, TF10 8NB, UK;2. Department of Food and Nutritional Sciences, University of Reading, Harry Nursten Building, Pepper Lane, Whiteknights, Reading, RG6 6DZ, UK;3. School of Life Sciences, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK |
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| Abstract: | ![]()
Fourteen genotypes of Chrysanthemum morifolium were induced to flower under a gradient that ran from 3 to 35 W m−2 visible light at a daylength of 9 h. The first sign of light stress was a reduction in number of flowers, followed by delayed flowering and finally, with increasing stress, no flowering at all. The minimum irradiance required for flowering may be as low as 5 W m−2 for some cultivars, which is considerably lower than the irradiance of 16 W m−2 falling on the plants in the greenhouse in winter. Large cultivar-differences in minimum light requirement for flowering were detected.At lower temperatures, the minimum level of light required for flowering increased. |
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