The Effect of Supplemental HPS Lighting during Propagation on Rooting and Quality of ‘White Marble’ Cut Chrysanthemums1

Hughes, Becky R.; Tsujita, M. J.

doi:10.21273/jashs.106.5.613

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…Those effects of supplemental irradiation during rooting the LD are in partial conflict with results of previous studies (13,14) which showed a strong influence of increasing irradiance during LD in reducing days to flower, but no significant effect as a result of rooting irradiation treatments. The present results do, however, correspond with other studies (11) which have shown that rooting irradiation treatments are effective in hastening flowering under conditions of low, natural irradiance.…”

Section: Resultssupporting

confidence: 87%

Response of Pot Chrysanthemum to Supplemental Irradiation during Rooting, Long Day, and Short Day Production Stages

Hicklenton

1984

J. Amer. Soc. Hort. Sci.

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Chrysanthemum × morifolium Ramat cv. Paragon plants were grown under supplemental irradiation from high-pressure sodium lamps during rooting, long day (LD), and short day (SD) production stages in all combinations. Plants which were rooted under supplemental irradiation had higher relative growth rates (RGR) and dry weight increments during that stage than nonirradiated controls. Supplemental irradiation similarly increased RGR and dry weight increments during LD and 5 weeks of SD. Root, top, and total dry weights at the end of the SD irradiation period showed a residual incremental effect of the LD treatment. Percentage of increases in dry weight increments due to supplemental irradiation were quite consistent between stages, whereas treatments had a greater effect on RGR during rooting and LD than during SD. The number of days to final harvest was reduced by supplemental irradiation during rooting and LD. The numbers of flowering stem breaks per pot, mean stem break length, and total plant dry weight were increased by supplemental irradiation at each stage. Those effects principally were additive. Flower dry weight per plant was increased significantly only by LD treatment. The benefits of supplemental irradiation during each production stage, and of combined treatments, are discussed in relation to operating costs.

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Section: Resultssupporting

confidence: 87%

Response of Pot Chrysanthemum to Supplemental Irradiation during Rooting, Long Day, and Short Day Production Stages

Hicklenton

1984

J. Amer. Soc. Hort. Sci.

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“…The supplemental irradiation during winter is predicted to decrease time to flower by 3 days, have no effect on shoot length, and increase flower area by 13%. Publications on the use of supplemental lighting have listed similar responses (4,5,17,18,20). In the summer, decreasing day and night temperature is predicted to decrease time to flower by 10 days, decrease stem length 2 cm, and increase flower area by 80%.…”

Section: R Esults and Discussionmentioning

confidence: 95%

Response Surface Analysis of Flowering in Chrysanthemum ‘Bright Golden Anne’

Karlsson

Heins

1986

J. Amer. Soc. Hort. Sci.

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Chrysanthemum morifolium Ramat. ‘Bright Golden Anne’ plants were grown under 15 combinations of photosynthetic photon flux (PPF), day temperature, and night temperature in a central composite design. Time to flower was a function of both irradiance and the interaction between day and night temperature. The surface response to temperature was bowl shaped with delayed development as temperatures were either increased or decreased from the optimum combinations. High temperature delay was compensated for in part by increased PPF. Shoot length increased linearly as day temperature increased; final shoot length first decreased, then increased with increasing night temperature. The response surface appeared as a rising valley with the longest shoot lengths at high day temperatures. Total flower area per plant increased as PPF increased or as night temperature decreased. For any PPF and night temperature, maximum flower area occurred near 20°C. At a constant PPF, the response surface appeared as a rising ridge with maximum flower area at low night temperature.

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“…Root growth of Aphelandra squarrosa was improved by the addition of dolomite to rooting media, but subsequent plant growth after transplant ing into pots was unaffected (1). Supple mentary lighting during rooting increased root grade and subsequent growth of chrysanthe mum cuttings (6). The cost of heating, how ever, may not be justified if subsequent plant growth does not increase sufficiently from the enhanced root growth.…”

mentioning

confidence: 99%

Influence of Light and Heated Medium on Rooting and Shoot Growth of Two Foliage Plant Species

Wang

1988

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Ficus benjamina and Codiaeum variegatum ‘Gold Dust’ stem tip cuttings were rooted in a mist bed at 290 or 90 µmols·m–2 Photosynthetic photon flux (PPF) with or without 28° ± 1°C medium heating and then potted. Number of roots in C. variegatum was unaffected by either PPF or medium heating; however, both factors enhanced root elongation. Forty days after potting, cuttings rooted under 290 µmol·s–1·m–2 had more lateral shoots than those rooted under 90 µmol·s-1·m–2 PPF. Although cuttings rooted in heated medium under the lower PPF had roots more than twice as long as those on cuttings rooted in unheated medium under the high PPF, it had little effect on subsequent shoot growth. F. benjamina rooting was improved in heated medium and was not affected by PPF. Unheated cuttings rooted better under high than low PPF. Shoot growth 10 weeks after transplanting was unaffected by the initial differences in root grade.

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The Effect of Supplemental HPS Lighting during Propagation on Rooting and Quality of ‘White Marble’ Cut Chrysanthemums1

Cited by 6 publications

References 3 publications

Response of Pot Chrysanthemum to Supplemental Irradiation during Rooting, Long Day, and Short Day Production Stages

Response of Pot Chrysanthemum to Supplemental Irradiation during Rooting, Long Day, and Short Day Production Stages

Response Surface Analysis of Flowering in Chrysanthemum ‘Bright Golden Anne’

Influence of Light and Heated Medium on Rooting and Shoot Growth of Two Foliage Plant Species

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