Library Catalogue

Library Catalogue

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    Union Catalogue of Agricultural Libraries in the Netherlands

    The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.

    Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.

    The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.

    As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".

    All titles are entered in their original language. Keywords are added to facilitate subject searching.

    The database is updated every day and now contains over 830.000 records.

Record number 104105
Title An analysis of the diurnal course of growth, carbon dioxide exchange and carbohydrate reserve content of cucumber
show extra info.
H. Challa
Author(s) Challa, H.
Publisher Wageningen : Pudoc
Publication year 1977
Description 88 p
Notes Proefschrift Wageningen  show all notes
Samenvatting in het Nederlands
Ook verschenen als handelsuitgave
ISBN 9022006239
Tutors Wit, Prof. Dr. Ir. C.T. de ; Brouwer, Prof. Dr. R.
Graduation date 1977-01-07
Dissertation no. 672
Author abstract show abstract
A detailed study was made of the diurnal course of carbon dioxide exchange, transpiration and carbohydrate reserve levels in different organs of young cucumberplants, cultivated in climate rooms under 'spring' or 'winter' conditions. Under spring conditions the stomata closed after about 8 hours light, causing a decrease in the rate of CO 2 uptake. This closure could not be ascribed to water shortage. Under winter conditions CO 2 production rapidly decreased after about 12 hours darkness, as a result of carbohydrate depletion. Additional respiration substrates were provided by protein breakdown. Reducing the air temperature during that period from 25 °C to 12 °C caused an increase in rate of plant growth, probably by reducing the amount of protein breakdown. The moment at which starch reserves were depleted was, under the conditions studied, independent of the amounts formed and seems to be 'preprogrammed'. Majority of the carbohydrate reserves formed during the day were used as respiration substrates. A comparison of the measured amounts of CO 2 production with theoretically derived values, showed a discrepancy which may be explained by underestimation of the amount of protein turnover.
Furthermore a new method is described for calibration of differential water vapour analysers and also for mixing pure CO 2 with CO 2 -free air to obtain air mixtures with various constant CO 2 -concentrations.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,672
FORUM ; STACKS ; NN08202,672
Keyword(s) (cab) cucumis sativus / cucumbers
Categories Fruit Vegetables
Publication type PhD thesis
Language English
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