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 429788
Title Photosynthetic gas exchange of Tomato (Solanum lycopersicum) in Fluctuating Light Intensity
Author(s) Kaiser, E.; Kromdijk, J.; Heuvelink, E.; Marcelis, L.F.M.
Source In: Proceedings of the 7th International Symposium on Light in Horticultural Systems (Book of Abstracts). - Leuven : ISHS - p. 122 - 122.
Event Leuven : ISHS VII International Symposium on Light in Horticultural Systems, Wageningen, 2012-10-15/2012-10-18
Department(s) Horticulture & Product Physiology
GTB Teelt & Gewasfysiologie
WUR GTB Gewasfysiologie Management en Model
Horticultural Supply Chains
Publication type Abstract in scientific journal or proceedings
Publication year 2012
Abstract In order to achieve high yields and year-round production, tomato (Solanum lycopersicum) production in greenhouses requires an extensive light integral. In northern countries, such as the Netherlands, year-round tomato production is impossible without inputs of artificial lighting. To save energy and money, it is of interest to investigate strategies that rely on dynamically modulating the intensity of artificial lighting. This can be achieved by using LEDs which, unlike the currently used high-pressure sodium (HPS) lamps, can be switched on and off frequently without considerable loss of efficiency and potential lifetime. In order to assess the quantitative effect that light fluctuations have on tomato leaf photosynthesis, photosynthesis under non-steady state conditions must be characterised. In this poster, we present combined gas exchange and chlorophyll fluorescence measurements of tomato (cv. Cappricia) leaf photosynthesis during gain and loss of photosynthetic induction. Different kinetic phases can be distinguished that could reflect limitations by RuBP- regeneration capacity, Rubisco activation state and stomatal opening and closing. These processes are activated in light and deactivated in the dark; their activation takes less time than their deactivation. We intend to combine these measurements with enzyme activity assays at a range of combinations of CO2 concentration, temperature and vapour pressure deficit to assess dynamic behaviour of photosynthetic gas exchange under conditions relevant to current greenhouse cultivation. The results will be fed into a crop growth model to explore novel lighting strategies
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