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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Selected References
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- Hilliard J. H., West S. H. Starch accumulation associated with growth reduction at low temperatures in a tropical plant. Science. 1970 Apr 24;168(3930):494–496. doi: 10.1126/science.168.3930.494. [DOI] [PubMed] [Google Scholar]
- King A. I., Reid M. S., Patterson B. D. Diurnal changes in the chilling sensitivity of seedlings. Plant Physiol. 1982 Jul;70(1):211–214. doi: 10.1104/pp.70.1.211. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kuraishi S., Arai N., Ushijima T., Tazaki T. Oxidized and reduced nicotinamide adenine dinucleotide phosphate levels of plants hardened and unhardened against chilling injury. Plant Physiol. 1968 Feb;43(2):238–242. doi: 10.1104/pp.43.2.238. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rufty T. W., Kerr P. S., Huber S. C. Characterization of diurnal changes in activities of enzymes involved in sucrose biosynthesis. Plant Physiol. 1983 Oct;73(2):428–433. doi: 10.1104/pp.73.2.428. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sicher R. C., Kremer D. F., Harris W. G. Diurnal carbohydrate metabolism of barley primary leaves. Plant Physiol. 1984 Sep;76(1):165–169. doi: 10.1104/pp.76.1.165. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Stewart J. M., Guinn G. Chilling injury and changes in adenosine triphosphate of cotton seedlings. Plant Physiol. 1969 Apr;44(4):605–608. doi: 10.1104/pp.44.4.605. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Stewart J. M., Guinn G. Chilling injury and nucleotide changes in young cotton plants. Plant Physiol. 1971 Aug;48(2):166–170. doi: 10.1104/pp.48.2.166. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Taylor A. O., Jepsen N. M., Christeller J. T. Plants under Climatic Stress: III. Low Temperature, High Light Effects on Photosynthetic Products. Plant Physiol. 1972 May;49(5):798–802. doi: 10.1104/pp.49.5.798. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Taylor A. O., Rowley J. A. Plants under Climatic Stress: I. Low Temperature, High Light Effects on Photosynthesis. Plant Physiol. 1971 May;47(5):713–718. doi: 10.1104/pp.47.5.713. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Yelenosky G. Accumulation of Free Proline in Citrus Leaves during Cold Hardening of Young Trees in Controlled Temperature Regimes. Plant Physiol. 1979 Sep;64(3):425–427. doi: 10.1104/pp.64.3.425. [DOI] [PMC free article] [PubMed] [Google Scholar]