Effects of temperature-drop and a short dark interruption on stem elongation and flowering in Begonia × hiemalis Fotsch

Grindal, G.; Moe, R.

doi:10.1016/0304-4238(94)90040-x

Cited by 13 publications

(12 citation statements)

References 6 publications

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“…DROP given at the end of the night or at the beginning of the day similarly reduced stem and petiole elongation, as it was earlier reported by Grimstad (1995) for young cucumber plants. Unlike in case with Euphorbia pulcherrima and Begonia x hiemalis Grindal & Moe, 1994), when DROP given in the middle of the night had only slight effect on plant height and leaf petiole length, in our work with cucumber plants there were no significant differences revealed between plant morphogenetic response to DROP given at different times during the night period. The same results we reported earlier (Sysoeva et al, 1997(Sysoeva et al, , 1999.…”

Section: Discussioncontrasting

confidence: 86%

“…However, the information about the effects of a temperature drop given at other times of the day or night (except for the end of the night and the beginning of the day) is extremely scarce. There is evidence that a temperature drop in the middle of the night had small effect on plant height and petiole length in Euphorbia pulcherrima and Begonia x hiemalis Grindal & Moe, 1994). In our previous studies we have shown that a temperature drop at the beginning, middle or end of the night was equally effective in reducing plant height and petiole length in cucumber (Sysoeva et al, 1997(Sysoeva et al, , 1999.…”

Section: Introductionmentioning

confidence: 91%

“…In the earlier studies on Lilium longiflorium Wiebe, Begonia x hiemalis Fortsch and Solanum lycopersicum L., it was shown that the temperature drop effect is the greatest in the first period of the day (Myster & Moe, 1995). Later, it was found that the temperature drop in the last part of the night is even more effective in reducing plant height and internode length in Begonia x chiemantha Everett Grindal & Moe, 1994, 1995Bakken & Moe, 1995), Euphorbia pulcherrima Willd. , tomato and cucumber (Grimstad, 1995).…”

Section: Introductionmentioning

confidence: 98%

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Responses of young cucumber plants to a diurnal temperature drop at different times of day and night

Шибаева

Шерудило

Ikkonen

et al. 2018

AAS

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<p>In greenhouse production of a number of vegetable and ornamental plant species, a short diurnal temperature drop in the end of the night or in the morning is commonly used to reduce stem elongation as an alternative to chemical growth retardants. Experiments were carried out to quantify the effects of a temperature drop at different times of the day and night on growth and photosynthetic activity of young cucumber plants. During 6 days plants were exposed daily to a temperature of 10 °C for 2 h at the beginning, in the middle and at the end of the night and day periods. The results have shown that plant response to drop may be qualitatively different in the light and darkness. While strongest effects of drop are observed when it is given in the daytime, for practical application in greenhouses it is more appropriate to reduce temperature at night. However, it may not be strictly necessary for cucumber seedlings to apply drop at the end of the night as it was stated in the literature. Thus, our results may cast doubt on the following statements: (a) temperature drops are not effective when delivered at other times of the day or night (except before sunrise), (b) optimal time for drop effects depends on the daily dynamics of stem and petiole elongation rate. It is rather drop itself is capable of modifying the dynamics of plant growth in the daily cycle.</p>

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Section: Discussioncontrasting

confidence: 86%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Responses of young cucumber plants to a diurnal temperature drop at different times of day and night

Шибаева

Шерудило

Ikkonen

et al. 2018

AAS

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“…For strong growing cultivars of the short day (SD) plant Begonia x hiemalis negative (DT < NT) or zero DIF (DT ‫ס‬ NT) results in compact plants of good quality (Myster and Moe 1995, Myster et al 1997, Willumsen et al 1995. Also, a temperature drop during the last 2 h of the night or in the beginning of the day decreases stem elongation in B. x hiemalis (Grindal and Moe 1994, Myster and Moe 1995, Willumsen et al 1993. Another factor affecting elongation growth is the photoperiod (Heide and Rünger 1985, Sandved 1969, 1971) (Myster, unpublished data).…”

mentioning

confidence: 99%

Thermo- and Photoperiodicity and Involvement of Gibberellins during Day and Night Cycle on Elongation Growth of Begonia x hiemalis Fotsch

Myster

Ernstsen

Junttila

et al. 1997

J Plant Growth Regul

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The effects of thermo-and photoperiodicity on elongation growth and on endogenous level of gibberellins (GAs) in Begonia x hiemalis during various phases of the day-night cycle have been studied. Plant tissue was harvested during the day and night cycle after temperature and photoperiodic treatments and analyzed for endogenous GAs using combined gas chromatography and mass spectrometry. Elongation growth increased when the difference between day and night temperature (DIF ‫ס‬ DT − NT) increased from a negative value (−9.0 and −4.5°C) to zero and with increasing photoperiod from 8 to 16 h. When applied to the youngest apical leaf, gibberellins A 1 , A 4 , and A 9 increased the elongation of internodes and petioles. GA 4 had a stronger effect on elongation growth than GA 1 and GA 9 . In relative values, the effect of these GAs decreased when DIF increased from −9 to 0°C. The time of applying the GAs during a day and night cycle had no effect on the growth responses. In general, endogenous levels of GA 19 and GA 20 were higher under negative DIF compared with zero DIF. The level of endogenous GA 1 in short day (SD)-grown plants was higher under zero DIF than under negative DIF, but this relationship did not appear in long day (LD)-grown plants. The main effects of photoperiod seem to be a higher level of GA 19 and GA

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“…It is normally assumed that stem elongation reaches its maximum around daybreak (Bertram 1992), so probably the drop concept simply acts by slowing the cell division process when it is at its highest, thereby reducing elongation. Grindal and Moe (1994) found that a drop in temperature from 18°C to 12°C for two hours just before daybreak reduced stem length, plant height and peduncle length in Begonia. They also concluded that temperature drop has greatest effect in short-day plants (SDP).…”

Section: Temperature Managementmentioning

confidence: 99%

Methods for growth regulation of greenhouse produced ornamental pot- and bedding plants – a current review

Bergstrand

2017

Folia Horticulturae

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Chemical plant growth regulators (PGRs) are used in the production of ornamental potted and bedding plants. Growth control is needed for maximizing production per unit area, reducing transportation costs and to obtain a desired visual quality. However, the use of PGRs is associated with toxicity risks to humans and the environment. In many countries the availability of PGRs is restricted as few substances are registered for use. A number of alternative methods have been suggested. The methods include genetic methods (breeding) and crop cultivation practices such as fertigation, temperature and light management. A lot of research into “alternative” growth regulation was performed during the 1980-1990s, revealing several possible ways of using different climatic factors to optimize plant growth with respect to plant height. In recent years, the interest in climatic growth regulation has been resurrected, not least due to the coming phase-out of the plant growth regulator chlormequat chloride (CCC). Today, authorities in many countries are aiming towards reducing the use of agrochemicals. At the same time, there is a strong demand from consumers for products produced without chemicals. This article provides a broad overview of available methods for non-chemical growth control. It is concluded that a combination of plant breeding and management of temperature, fertigation and light management has the potential of replacing chemical growth regulators in the commercial production of ornamental pot- and bedding plants.

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Effects of temperature-drop and a short dark interruption on stem elongation and flowering in Begonia × hiemalis Fotsch

Cited by 13 publications

References 6 publications

Responses of young cucumber plants to a diurnal temperature drop at different times of day and night

Responses of young cucumber plants to a diurnal temperature drop at different times of day and night

Thermo- and Photoperiodicity and Involvement of Gibberellins during Day and Night Cycle on Elongation Growth of Begonia x hiemalis Fotsch

Methods for growth regulation of greenhouse produced ornamental pot- and bedding plants – a current review

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