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 498437
Title A unique approach to demonstrating that apical bud temperature specifically determines leaf initiation rate in the dicot Cucumis sativus
Author(s) Savvides, Andreas; Dieleman, Anja; Ieperen, Wim van; Marcelis, Leo F.M.
Source Planta (2016). - ISSN 0032-0935 - p. 1071 - 1079.
DOI http://dx.doi.org/10.1007/s00425-015-2464-4
Department(s) Horticulture and Product Physiology Group
WUR GTB Algemeen
WUR GTB Gewasfysiologie Management en Model
WUR GTB Teelt & Bedrijfssystemen
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Cucumber (Cucumis sativus L.) - Leaf formation - Modelling - Shoot apical meristem
Abstract

Main conclusion: Leaf initiation rate is largely determined by the apical bud temperature even when apical bud temperature largely deviates from the temperature of other plant organs.We have long known that the rate of leaf initiation (LIR) is highly sensitive to temperature, but previous studies in dicots have not rigorously demonstrated that apical bud temperature controls LIR independent of other plant organs temperature. Many models assume that apical bud and leaf temperature are the same. In some environments, the temperature of the apical bud, where leaf initiation occurs, may differ by several degrees Celsius from the temperature of other plant organs. In a 28-days study, we maintained temperature differences between the apical bud and the rest of the individual Cucumis sativus plants from −7 to +8 °C by enclosing the apical buds in transparent, temperature-controlled, flow-through, spheres. Our results demonstrate that LIR was completely determined by apical bud temperature independent of other plant organs temperature. These results emphasize the need to measure or model apical bud temperatures in dicots to improve the prediction of crop development rates in simulation models.

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