Photoperiod and tulip growth

Hanks, Gordon R.; Rees, A. R.

doi:10.1080/00221589.1979.11514846

Cited by 11 publications

(10 citation statements)

References 8 publications

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“…Parameters of corolla elongation-Investigators almost unanimously agree that corolla elongation is accompanied by cell elongation, cell expansion, and increases in both fresh and dry weight (Alpi et aI., 1976;Berghoef and Bruinsma, 1979b;Camprubi andNichols, 1978, 1979;Gopal, Venkataramanan and Raju, 1975;Greyson and Sawhney, 1972;Hanks and Rees, 1979;Janardhan et aI., 1977;Moe and Kristoffersen, 1969;Murakami, 1975;Stark, 1982;Stead and Moore, 1977;Zies1in et aI., 1974). The corollas of Gaillardia disc flowers do not expand during opening (Koning, 1981), but corollas of ray flowers do (Fig.…”

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confidence: 99%

The Roles of Plant Hormones in the Growth of the Corolla of Gaillardia Grandiflora (Asteraceae) Ray Flowers

Koning

1984

American J of Botany

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Corolla elongation and the roles of plant hormones in this process in Gaillardia grandiflora Van Houtte ray flowers were examined. The sterile ray flowers elongated during a 2‐day period, and corolla growth was accompanied by fresh and dry weight increases and epidermal cell elongation (greatest near the base of the corolla) but not by cell division. Corollas excised from young ray flowers were measured during treatment in vitro with solutions of plant growth regulators. They elongated in response to gibberellins and fusicoccin but did not respond to auxins, cytokinins, abscisic acid, ethylene, or inhibitors of ethylene biosynthesis. Sequential and simultaneous hormone applications indicated no additive or synergistic effects between hormones, but auxin did reduce gibberellin‐promoted growth. Analyses of endogenous auxins showed no significant variation, and ethylene production decreased prior to elongation, while a 20‐fold increase in endogenous gibberellin activity was observed just prior to rapid corolla elongation. It appears that corolla growth in Gaillardia is accomplished by an increase in gibberellin activity alone, that multiple hormone interactions are not important in the control of corolla growth, and that part of the mode of action of gibberellin is acid‐induced growth.

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The Roles of Plant Hormones in the Growth of the Corolla of Gaillardia Grandiflora (Asteraceae) Ray Flowers

Koning

1984

American J of Botany

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“…Some earlier workers reported on photoperiodic cycles and their effects on flower induction (Bunt, 1973;Hunks and Rees, 1979). However, those studies reported were essentially on the effects of continuous short and long photoperiods on growth, development and flower induction in bambara groundnut although Linnemann (1993) studied the phenological development in bambara groundnut at constant exposure to photoperiods of 10 hours to 16 hours.…”

Section: Discussionmentioning

confidence: 99%

Reactions of bambara groundnut accessions to photoperiods

Uchehara¹,

Asiegbu²,

Onyeonagu³

2015

Agro-Sci.

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“…These data are very useful for practical trials of FR lighting. Since the effect of the LD treatment was found to vary according to growing temperatures 11 , the FR effect presumably also varies in response to temperature conditions. Therefore, the FR lighting method must be optimized for use under commercial production conditions.…”

Section: Discussionmentioning

confidence: 99%

“…A 16-h LD treatment with warm white tubular fluorescent lamps was found to promote the extension growth of stems and produced longer cut flowers than 8-h short-day conditions under low growing temperature (9°C) 11 . Considering that photoreceptors should be involved in light perception in these LD responses, the LD signals from photoreceptors must promote extension growth.…”

Section: Introductionmentioning

confidence: 99%

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Spectral Sensitivity of the Extension Growth of Tulips Grown with Night Lighting under a Natural Photoperiod

Sumitomo

Tsuji

Yamagata

et al. 2012

JARQ

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The effect of light quality on the extension growth of tulips was investigated for 4 tulip (Tulipa gesneriana) cultivars "Leen van der mark," "Murasaki suisho," "Come back," and "Kikomachi." The exposure of tulips to ultraviolet-A (UV-A), blue (B), red (R) or far-red (FR) fluorescent tubes throughout the entire night (a process called "night lighting") was found to promote lengthening of the stem and first internode of plants grown under natural photoperiod conditions in a greenhouse. The effectiveness of FR night lighting was consistently observed across 4 cultivars, although the effectiveness of illumination within the UV-A, B and R wavelength ranges was found to vary with respect to stem length, the first internode and among different cultivars. Elevated photon flux densities of FR light were found to quantitatively increase the extension growth of "Leen van der mark," but the effect of FR night lighting reached saturation point at 0.59 μmol m -2 s -1. A 4-h end-of-day lighting period and night-break FR lighting period were also found to promote extension growth, but these effects were less pronounced than that induced by FR night lighting. A 4-h end-of-night FR lighting period had no effect on extension growth. Apart from these findings, the effects of the light quality on extension growth are discussed.

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Photoperiod and tulip growth

Cited by 11 publications

References 8 publications

The Roles of Plant Hormones in the Growth of the Corolla of Gaillardia Grandiflora (Asteraceae) Ray Flowers

The Roles of Plant Hormones in the Growth of the Corolla of Gaillardia Grandiflora (Asteraceae) Ray Flowers

Reactions of bambara groundnut accessions to photoperiods

Spectral Sensitivity of the Extension Growth of Tulips Grown with Night Lighting under a Natural Photoperiod

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