Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 41912
Title Root temperature effects on growth and bud break of Rosa hybrida in relation to cytokinin concentrations in xylem sap.
Author(s) Dieleman, J.A.; Verstappen, F.W.A.; Kuiper, D.
Source Scientia Horticulturae 76 (1998). - ISSN 0304-4238 - p. 183 - 192.
Department(s) Research Institute for Agrobiology and Soil Fertility
Horticultural Supply Chains
Publication type Refereed Article in a scientific journal
Publication year 1998
Abstract The effects of three divergent root temperatures (11°C, 20°C and 26°C) on growth and bud break of Rosa hybrida were studied. Root morphology was changed considerably with root temperature. Roots at 11°C were white, succulent, short and sparsely branched, whereas at 26°C roots were long, brown, thin and branched. However, root dry weight was not affected by root temperature. Axillary bud break was earlier at higher root temperatures, resulting in a higher shoot dry weight. At higher temperatures, bottom breaks tended to appear earlier. Our hypothesis was that the effect of root temperature on growth and bud break of the shoot is mediated by cytokinin production in the roots and/or cytokinin translocation to the shoot. The concentration of zeatin riboside (ZR) in bleeding sap was determined during plant development. ZR was found to decrease slightly after bud break, but was not affected by the root temperature treatments, which falsified our hypothesis. Other processes may be involved in the effect of root temperature on shoot growth and bud break
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