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| DOI: | 10.2307/2404718 |
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| Web URL(s): | http://www.jstor.org/stable/pdfplus/2404718.pdf
Last checked: 03/22/2011
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http://www.jstor.org/stable/2404718
Last checked: 04/23/2014
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Robson, M. J. |
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| Author Affiliation: | The Grassland Research Institute, Hurley, Berkshire |
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| Title: | Independent variation of day and night temperatures |
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| Article Series: | The effect of temperature on the growth of S. 170 tall fescue (Festuca arundinacea), part 2 |
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| Source: | Journal of Applied Ecology. Vol. 10, No. 1, April 1973, p. 93-105. |
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| # of Pages: | 13 |
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| Related Web URL: | http://www.jstor.org/stable/info/2404718
Last checked: 04/23/2014
Notes: Summary only |
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| Keywords: | TIC Keywords: Festuca arundinacea; Temperatures; Tillering; Chemical composition; Nitrogen level; Carbohydrates; Growth rate
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| Abstract/Contents: | "Young plants of S.170 tall fescue were grown in different day/night temperature regimes in this study, and an earlier one, which together covered most of the combinations of 10, 15, 20, 25 and 30° C in four series of experimental treatments. Leaf width, the number of externally visible leaves growing on a shoot at the same time and the nitrogen content of the plants were little affected by temperature. The tiller number and water-soluble carbohydrate content of the plants were increased by lowering either the day or the night temperature while holding the other constant at 20° C. When the mean day/night temperature was maintained at 20° C, higher values of these two parameters were reached in the 20°/20° C regime than in any other. The duration of growth of an individual leaf and the time interval between the appearance of successive leaves were reduced equally by raising the temperature of either the day or night to 25°, but not to 30° C, while keeping the other at 20° C. All but one of the remaining paramaters-lamina length and area; sheath length; rate of leaf growth; leaf area ratio, FA; specific leaf area, SA; leaf weight ratio, FW; unit leaf rate, EA; relative rate of leaf area increase, RA, and relative growth rate, RW, achieved maximum values in the 25°/25° C regime and were more affected by the day temperature than by that of the night. When the night temperature was held at 20° C, the optimum day temperature for EA, RA and RW was also about 20° C, whereas for the other growth attributes, it was about 29° C. Similarly in a mean temperature of 20° C all attributes achieved maximum values when the day temperature exceeded that of the night by 4-10° C. Thus when the night temperature was kept below its optimum of 25° C, a higher day temperature usually favoured growth, and when a sub-optimal mean temperature was maintained, raising the day temperature favoured growth more than lowering the night temperature depressed it. When the day temperature was optimal at 25° C, or slightly sub-optimal at 20° C, the optimum night temperature was one equal to that of the day. When the day temperature was markedly sub-optimal at 10 or 15° C, a higher night temperature favoured growth. Only when the day temperature was supra-optimal at 30° C was a lower night temperature beneficial. There was no evidence that this material, grown in these conditions, responded to temperature in accord with the concept of thermoperiodicity." |
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| Language: | English |
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| References: | 25 |
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| See Also: | See also part 1 "Constant temperature" Journal of Applied Ecology, 9(2) August 1972, p. 643-653, R=4235. R=4235
See also part 3 "Leaf growth and tiller production as affected by transfer between contrasting regimes" Journal of Applied Ecology, 11(1) April 1974, p. 265-279, R=4203. R=4203 |
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| Note: | Summary appears as abstract
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Robson, M. J. 1973. Independent variation of day and night temperatures. J. Appl. Ecol. 10(1):p. 93-105. |
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| DOI: 10.2307/2404718 |
| Web URL(s):
http://www.jstor.org/stable/pdfplus/2404718.pdf
Last checked: 03/22/2011
Requires: PDF Reader
Access conditions: Item is within a limited-access website
http://www.jstor.org/stable/2404718
Last checked: 04/23/2014
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: S 3 .J86 |
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