Relationships between circadian rhythm of chilling resistance and acclimation to chilling in cotton seedlings

McMillan, Kelcey D.; Rikin, Arnon

doi:10.1007/bf02411399

Cited by 9 publications

(6 citation statements)

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“…This rhythm is undetectable in seedlings subjected to water stress (Couderchet and Koukkari 1987). Cotton seedlings grown at 35 ~ C show a circadian rhythm of chilling resistance, but when kept under 25 ~ C they become and remain resistant during all the LDC (McMillan and Rikin 1990). Upon termination of pulses of 19 ~ C, 100% RH to cotton seedlings the reset period is immediately obvious under most conditions.…”

Section: Discussionmentioning

confidence: 91%

“…Cotton seedlings grown at 33 ~ C under LDCs of 12:12 h showed a circadian rhythm of chilling resistance (McMillan and Rikin 1990;Fig. 1A).…”

Section: Phase Shifting Of Chilling Resistance By Low Temperaturementioning

confidence: 99%

“…The degree of chilling resistance in cotton seedlings is regulated by internal and external factors (McMillan and Rikin 1990). Seedlings grown at 35 ~ C show a circadian rhythm of chilling resistance.…”

Section: Introductionmentioning

confidence: 99%

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Temperature-induced phase shifting of circadian rhythms in cotton seedlings as related to variations in chilling resistance

Rikin

1991

Planta

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The relationship between the degree of chilling resistance and phase shifting caused by low-temperature pulses was examined in two circadian rhythms in cotton (Gossypium hirsutum L. cv. Deltapine 50) seedlings grown under light-dark cycles of 12∶12 h at 33° C. The seedlings showed a circadian rhythm of chilling resistance and of cotyledon movement. A pulse of 19° C for 12 h during the chilling-sensitive phase (light period) caused a phase delay of 6 h, while a similar temperature pulse during the chilling-resistant phase (dark period) did not cause any phase shift. Exposure to 19° C, 85% RH (relative humidity) for 12 h during the dark period induced chilling resistance in the following otherwise chilling-sensitive light period. In this light period a 12-h 19° C pulse did not cause a phase shift of chilling resistance. Pulses of low temperatures (5-19° C) were more effective in causing phase delays in the rhythm of cotyledon movement when given during the chilling-sensitive phase than when given during the chilling-resistant phase. A 12-h pulse of 5° C, 100% RH during the light period caused a phase delay of cotyledon movement of 12 h. However, when that pulse had been preceded by a chill-acclimating exposure to 19° C, 85% RH for 12 h during the dark period the phase delay was shortened to 6 h. The correlation between higher degree of chilling resistance and the prevention or shortening of the phase delay caused by low temperatures indicates that the mechanism that increases chilling resistance directly or indirectly confers greater ability for prevention of phase shifting by low temperatures in circadian rhythms.

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Section: Discussionmentioning

confidence: 91%

“…Cotton seedlings grown at 33 ~ C under LDCs of 12:12 h showed a circadian rhythm of chilling resistance (McMillan and Rikin 1990;Fig. 1A).…”

Section: Phase Shifting Of Chilling Resistance By Low Temperaturementioning

confidence: 99%

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Temperature-induced phase shifting of circadian rhythms in cotton seedlings as related to variations in chilling resistance

Rikin

1991

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“…[44][45][46] Different clock mutants have been identified that show loss of temperature compensation; the clock runs slightly faster at higher temperatures in these mutants. 47,48 Indeed, cold as well as chilling tolerance has been shown to be regulated endogenously by the circadian clock; [49][50][51][52][53] the amount of tolerance to low temperatures displays daily oscillations and is dependent on the time of exposure. The tolerance phase starts near dusk and last throughout most of the night.…”

Section: Cold Acclimation and Circadian Rhythmsmentioning

confidence: 99%

Interplay between low-temperature pathways and light reduction

Lindlöf

2010

Plant Signaling & Behavior

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Low temperature is one of the major factors that adversely affect crop yields by causing restraints on plant growth and productivity. However, most temperate plants have the ability to acclimate to cooler temperatures. Cold acclimation is a process which increases the freezing tolerance of an organism after exposure to low, non-freezing temperatures. The main trigger is a decrease in temperature levels, but light reduction has also been shown to have an important impact on acquired tolerance. Since the lowest temperatures are commonly reached during the night hours in winter time and is an annually recurring event, a favorable trait for plants is the possibility of sensing an imminent cold period. Consequently, extensive crosstalk between light- and temperature signaling pathways has been demonstrated and in this review interesting interaction points that have been previously reported in the literature are highlighted.

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“…Fiber development is typically divided into two stages, primary wall formation (to accomplish elongation) and secondary wall synthesis (to accomplish fiber thickening) (24 Current address: University of Iowa, Ames, IA. lose in the secondary wall that is required for fiber maturation (10,17), and temperatures less than 250C are low enough to induce resistance to the deleterious effects of subsequent exposure to 50C in cotton seedlings (20). The research reported here is focused on the period of secondary wall deposition because of the adverse effect of cool night temperatures in northern cotton growing regions on fiber cell wall thickening, which is a major determinant of crop quality and value (10).…”

mentioning

confidence: 99%

Effects of Cycling Temperatures on Fiber Metabolism in Cultured Cotton Ovules

Roberts¹,

Rao²,

Huang³

et al. 1992

Plant Physiol.

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The effects of temperature on rates of cellulose synthesis, respiration, and long-term glucose uptake were investigated using cultured cotton ovules (Gossypium hirsutum L. cv Acala Si1). Ovules were cultured either at constant 340C or under cycling temperatures (12 h at 34'C/12 h at 15-400C). Rates of respiration and cellulose synthesis at various temperatures were determined on day 21 during the stage of secondary wall synthesis by feeding cultured ovules with [14C]glucose. Respiration increased between 18 and approximately 34C, then remained constant up to 40"C. In contrast, the rate of cellulose synthesis increased above 18 C, reached a plateau between about 28 and 37 C, and then decreased at 40'C. Therefore, the optimum temperature for rapid and metabolically efficient cellulose synthesis in Acala S11 is near 28'C. In ovules cycled to 150C, respiration recovered to the control rate immediately upon rewarming to 340C, but the rate of cellulose synthesis did not fully recover for several hours. These data indicate that cellulose synthesis and respiration respond differently to cool temperatures. The long-term uptake of glucose, which is the carbon source in the culture medium, increased as the low temperature in the cycle increased between 15 and 28 C. However, glucose uptake did not increase in cultures grown constantly at 340C compared to those cycled at 34/280C. These observations are consistent with previous observations on the responses of fiber elongation and weight gain to cycling temperatures in vitro and in the field.The cotton fiber is a single elongated epidermal cell of ovules of Gossypium species. Fiber development is typically divided into two stages, primary wall formation (to accomplish elongation) and secondary wall synthesis ( Current address: University of Iowa, Ames, IA. lose in the secondary wall that is required for fiber maturation (10, 17), and temperatures less than 250C are low enough to induce resistance to the deleterious effects of subsequent exposure to 50C in cotton seedlings (20). The research reported here is focused on the period of secondary wall deposition because of the adverse effect of cool night temperatures in northern cotton growing regions on fiber cell wall thickening, which is a major determinant of crop quality and value (10). Although general mechanisms explaining the inhibitory effects of low, nonfreezing temperatures on plant growth have been suggested (14), specific mechanisms by which cellulose synthesis in cotton is decreased are not known. Nor is it known if cellulose synthesis is affected similarly or differently than overall metabolism. One or more factors required for cellulose synthesis could be disrupted by cool temperatures, including (a) production, transport, or uptake of substrate (7, 9); (b) provision of sufficient energy through respiration; (c) function of enzymes due to membrane phase changes (18, 27) or direct kinetic effects (13); and (d) function of the endomembrane system and cytoskeletal elements.One goal of our research is to un...

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Relationships between circadian rhythm of chilling resistance and acclimation to chilling in cotton seedlings

Cited by 9 publications

References 14 publications

Temperature-induced phase shifting of circadian rhythms in cotton seedlings as related to variations in chilling resistance

Temperature-induced phase shifting of circadian rhythms in cotton seedlings as related to variations in chilling resistance

Interplay between low-temperature pathways and light reduction

Effects of Cycling Temperatures on Fiber Metabolism in Cultured Cotton Ovules

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