Differential Effects of Day and Night Temperature on Development to Flowering in Rice
| Autor: | Martin J. Kropff, J. Goudriaan, Xinyou Yin |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
photoperiodism
Oryza sativa Research Institute for Agrobiology and Soil Fertility Day and night temperature Sowing Instituut voor Agrobiologisch en Bodemvruchtbaarheidsonderzoek Plant Science Development Biology PE&RC Laboratorium voor Theoretische Productie Ecologie en Agronomie Differential effects Flowering Plant development Horticulture Agronomy Theoretical Production Ecology Nonlinear model Thermoperiodicity Rice Cultivar |
| Zdroj: | Annals of Botany, 77, 203-213 Scopus-Elsevier Annals of Botany 77 (1996) |
| ISSN: | 0305-7364 |
| DOI: | 10.1006/anbo.1996.0024 |
| Popis: | There are conflicting reports with regard to difference in effects of day temperature ( T D ) and night temperatures ( T N ) on plant development. The objective of this study is to determine whether there are different effects of T D and T N on development from sowing to flowering in rice ( Oryza sativa L.). Plants of 24 rice cultivars were grown in naturally-lighted growth chambers at five diurnally constant (22, 24, 26, 28 and 32 °C) and four diurnally fluctuating temperatures (26 /22, 30 /22, 22 /26 and 22 /30 °C for T D / T N with 12hd -1 each) with a constant photoperiod of 12hd -1 . The treatments were selected to enable the separation of effects of T D and T N on development rate (DR). The response of DR to constant temperatures was typically nonlinear. This nonlinearity could not explain the difference in flowering dates between fluctuating temperatures with the same mean daily value but opposite T D / T N differences. Differential effects of T D and T N on DR to flowering were detected in all but one cultivar. In most cases, T D exerted a greater influence than T N , in contrast with many previous reports based on the assumption of a linearity between DR and temperature. The data were further analysed by a nonlinear model which separated effects of T D and T N . The estimated value for the optimum T N was generally 25 –29 °C, about 2 –4 °C lower than the estimated optimum T D in most cultivars. The effects of T D and T N on DR were found to be interactive in some cultivars. These results form a new basis for modelling flowering dates in rice. |
| Databáze: | OpenAIRE |
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