Mature plant resistance of potato against some virus diseases. II. Mature plant resistance and the influence of temperature on the ribosome and RNA content in leaves |
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| Authors: | J H Venekamp A B R Beemster |
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| Institution: | 1. Centrum voor Agrobiologisch Onderzoek (CABO), Bornsesteeg 65, Postbus 14, 6700 AA, Wageningen, the Netherlands
2. Instituut voor Plantenziektenkundig Onderzoek (IPO), Binnenhaven 12, Postbus 42, 6700 AA, Wageningen, the Netherlands
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| Abstract: | Potato plants ‘Bintje’ were grown in growth chambers; one group of 27 plants at a daily regime of 15 h light and 9 h darkness with corresponding temperatures of 18 °C and 12°C, and a second group of 27 potato plants at a daily regime of 15 h light and 9 h darkness with corresponding temperatures of 22 °C and 17 °C. The plants of both groups were inoculated with potato virus X (PVX) 56 days after planting. Young leaves had a 3-fold higher ribosome and RNA content than ageing leaves. The decrease occurred earlier at 22 °C than at 18 °C. Although plants grown at 18 C produced smaller and fewer leaves than those grown at 22 C, the former produced a higher weight of tubers than those at the higher temperature. Although corresponding leaves of both groups showed considerable differences in ribosome and RNA contents, the rate of virus translocation to the tubers was equal in both groups. This can be explained by the different growth pattern. |
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