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King AI, Joyce DC, Reid MS. Role of carbohydrates in diurnal chilling sensitivity of tomato seedlings. Plant Physiol. 1988;86(3):764-8doi: 10.1104/pp.86.3.764.
King, A. I., Joyce, D. C., & Reid, M. S. (1988). Role of carbohydrates in diurnal chilling sensitivity of tomato seedlings. Plant physiology, 86(3), 764-8. https://doi.org/10.1104/pp.86.3.764
King, A I, et al. "Role of carbohydrates in diurnal chilling sensitivity of tomato seedlings." Plant physiology vol. 86,3 (1988): 764-8. doi: https://doi.org/10.1104/pp.86.3.764
King AI, Joyce DC, Reid MS. Role of carbohydrates in diurnal chilling sensitivity of tomato seedlings. Plant Physiol. 1988 Mar;86(3):764-8. doi: 10.1104/pp.86.3.764. PMID: 16665984; PMCID: PMC1054566.
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Plant Physiol. 1988 Mar;86(3):764-8. doi: 10.1104/pp.86.3.764.

Role of carbohydrates in diurnal chilling sensitivity of tomato seedlings.

Plant physiology

A I King, D C Joyce, M S Reid

Affiliations

  1. Department of Environmental Horticulture, University of California, Davis, California 95616.

PMID: 16665984 PMCID: PMC1054566 DOI: 10.1104/pp.86.3.764

Abstract

Tomato seedlings (Lycopersicon esculentum Mill.) chilled starting at different times during the light/dark cycle were most chilling-sensitive at the end of the dark period (AI King, MS Reid, BD Patterson 1982 Plant Physiol 70: 211-214). Low-temperature tolerance was regained with as little as 10 minutes of light exposure. Low light intensities were less effective than high light intensities in reducing sensitivity, and the length of exposure to light directly influenced sensitivity. Seedlings kept at low night temperatures prior to chilling were also less injured following chilling. Light also restored chilling tolerance to seedlings whose roots were removed. Supplying cut shoots with sucrose, glucose, or fructose reduced chilling sensitivity and largely eliminated the diurnal difference in sensitivity. Endogenous carbohydrate content was correlated with changes in chilling sensitivity; starch and sugar content fell markedly during the dark period. Increased concentrations of sugars were detected 15 minutes after the start of the light period. This evidence all suggests that changes in chilling sensitivity over the diurnal period are regulated by the light cycle. It also suggests that increased sensitivity at the end of the dark period could be due to carbohydrate depletion, and that chilling tolerance following light exposure is likely due to carbohydrate accumulation or closely related events.

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