Effects of Cutting Time and Low-temperature Treatment of Rooted Cuttings on Stem Elongation and Leaf Number in Cultivars of Chrysanthemum morifolium Ramat.

Tanigawa, Takahiro; Kunitake, Toshihiro; Matsuno, Takatoshi; Yamada, Asuka; Suyama, Takahito

doi:10.2503/jjshs1.78.218

Cited by 2 publications

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“…The ILN of cuttings from mother plants grown at 7°C or 10°C was significantly decreased compared with that of plants grown at 13°C or 16°C, and there was no significant difference between ILN in the 7°C and 10°C treatments. It is well known that 'Shuho no Chikara' has a strong rosette habit (Ohishi et al, 1986;Tanigawa et al, 2009). Konishi (1975) reported that 'Okayamaheiwa' plants treated with low temperature for a shorter period formed rosettes, whereas those treated for a longer period underwent stem elongation and flowered rapidly.…”

Section: Discussionmentioning

confidence: 99%

Long-term Exposure of Mother Plants to Low Temperatures Delays Flowering of Japanese Autumn-flowering Chrysanthemum morifolium Ramat. ‘Jinba’ and ‘Seiko no Aki’

Kunitake

Tanigawa

Matsuno

et al. 2009

J. Japan. Soc. Hort. Sci.

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To clarify the reason for delayed flowering of Chrysanthemum morifolium 'Jinba' cuttings propagated from mother plants during winter and spring production, the effects of growing temperatures of mother plants, and those of rooted cuttings grown in long days or short days, on vegetative growth and flowering in three autumnflowering Chrysanthemum cultivars were investigated. Rooted cuttings of 'Jinba', propagated from mother plants exposed to two temperature regimes, were planted on December 26 and grown in two temperature regimes with long days. Plants with each treatment were then grown with short days using two temperature regimes. Flowering of rooted cuttings propagated from mother plants exposed to ambient low temperatures and grown at 25/10°C (7:00-19:00/19:00-7:00) with long days, and subsequently grown at 25/20°C or 25/10°C with short days, was delayed 11.4 and 14.4 days, respectively, compared with cuttings propagated from mother plants grown at a minimum temperature of 15°C. In a further experiment, the mother plants of three autumn-flowering cultivars were grown at four temperature regimes of 7°C, 10°C, 13°C, or 16°C for 50 days. Flower budding of 'Jinba' and 'Seiko no Aki' was delayed and the increase in leaf number (ILN) with short days was greater when mother plants were grown at 7°C or 10°C compared with plants grown at 16°C. In contrast, flower budding of 'Shuho no Chikara' cuttings propagated from mother plants grown at 7°C or 10°C was accelerated and the ILN decreased compared with those grown at 16°C. Clearly, delayed flowering of 'Jinba' and 'Seiko no Aki' was due to longterm exposure of mother plants to temperatures below 10°C. For suitable flowering of these cultivars, mother plants should be grown at a temperature exceeding about 15°C or the plants must be grown at a high temperature with long days for several weeks.

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Section: Discussionmentioning

confidence: 99%

Long-term Exposure of Mother Plants to Low Temperatures Delays Flowering of Japanese Autumn-flowering Chrysanthemum morifolium Ramat. ‘Jinba’ and ‘Seiko no Aki’

Kunitake

Tanigawa

Matsuno

et al. 2009

J. Japan. Soc. Hort. Sci.

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“…forms a rosette or rosette-type growth form in autumn and winter (Cathey, 1954;Konishi, 1975;Mason and Vince, 1958;Okada, 1959Okada, , 1963Tanigawa et al, 2009). After passing through the rosette stage, the plants grow rapidly and flower early in a heated greenhouse at temperatures of 15-20°C (Cathey, 1954;Schwabe, 1950).…”

Section: Introductionmentioning

confidence: 99%

Exposure of Rooted Cuttings to Long Days, or Mother Plants to High Temperature, Can Avoid Delayed Flowering of Chrysanthemum morifolium Ramat. ‘Jinba’ for Winter and Spring Cut-flower Production

Kunitake

Tanigawa

Matsuno

et al. 2009

J. Japan. Soc. Hort. Sci.

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In order to prevent delayed flowering of Chrysanthemum morifolium 'Jinba' during winter and spring cut-flower production, the effects of exposing rooted cuttings to long days (the vegetative growth stage), or mother plants to temperature, on the growth and flowering of plants were investigated. Days to flower budding in plants in short days, propagated from mother plants exposed to ambient low temperature, grown at a constant temperature regime of 20°C or 25°C in long days, were reduced compared with those of plants grown at 10°C or 15°C. Flower budding in rooted cuttings grown at 10°C in long days was delayed compared with 20°C or 25°C treatments when the rooted cuttings were subsequently grown at the same temperature in short days. The increase in leaf number in short days was also reduced with 20°C or 25°C treatment compared with 10°C treatment. In response to treatment with a constant temperature regime of 20/15°C or 20/20°C in long days for 2-8 weeks, days to flower budding in short days was significantly reduced in response to 20/20°C for 4, 6, or 8 weeks than the other treatments; differences among these treatments were not significant. Flower budding of rooted cuttings propagated from mother plants grown at a minimum temperature of 15°C was advanced compared with from mother plants exposed to ambient low temperature. These experiments show that to avoid delayed flowering of 'Jinba' for winter and spring production, rooted cuttings, propagated from mother plants exposed to ambient low temperature, must grow at a minimum temperature of 20°C for at least 4 weeks, or rooted cuttings should be taken from mother plants grown at a minimum temperature of 15°C.

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Effects of Cutting Time and Low-temperature Treatment of Rooted Cuttings on Stem Elongation and Leaf Number in Cultivars of Chrysanthemum morifolium Ramat.

Cited by 2 publications

References 4 publications

Long-term Exposure of Mother Plants to Low Temperatures Delays Flowering of Japanese Autumn-flowering Chrysanthemum morifolium Ramat. ‘Jinba’ and ‘Seiko no Aki’

Long-term Exposure of Mother Plants to Low Temperatures Delays Flowering of Japanese Autumn-flowering Chrysanthemum morifolium Ramat. ‘Jinba’ and ‘Seiko no Aki’

Exposure of Rooted Cuttings to Long Days, or Mother Plants to High Temperature, Can Avoid Delayed Flowering of Chrysanthemum morifolium Ramat. ‘Jinba’ for Winter and Spring Cut-flower Production

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