Effects of temperature and photoperiod on early growth and final number of tubers in potato (Solanum tuberosum L.) |
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Authors: | J Van Dam P L Kooman P C Struik |
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Institution: | (1) Department of Agronomy, Wageningen Agricultural University, Haarweg 333, 6709 RZ Wageningen, The Netherlands;(2) Department of Theoretical Production Ecology, Wageningen Agricultural University, Bornsesteeg 65, 6708 PD Wageningen, The Netherlands |
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Abstract: | Summary A phytotron experiment with all combinations of two photoperiod (12 or 18 h) and four temperature (18/12, 22/16, 26/20 or
30/24 °C; 12h/12h) treatments was carried out to analyse quantitative effects on early tuber growth, dry-matter partitioning
and number of tubers of two cultivars.
Higher temperatures and longer photoperiod delayed the onset of expolinear tuber growth and the onset of linear tuber bulking.
Higher temperatures also gave lower absolute tuber growth rates. Photoperiod did not affect absolute tuber growth rate at
lower temperatures. Higher temperature and longer photoperiod gave lower relative rates of partitioning of dry matter to the
tubers. Differences between treatments in numbers of tubers initiated were inconsistent. This quantitative analysis of the
effects of temperature and photoperiod on characteristics of tuber growth should prove useful in potato modelling. |
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Keywords: | tuber initiation tuberisation tuber growth rate tuber bulking dry matter partitioning |
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