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 104245
Title A preliminary study of photoperiodic and formative processes in relation to metabolism, with special reference to the effect of night temperature
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door Sibergina Wagenaar
Author(s) Wagenaar, S.
Publisher Wageningen : Veenman
Publication year 1954
Description VI, 58 p
Notes Proefschrift Wageningen  show all notes
Ook verschenen als: Mededelingen / Landbouwhogeschool Wageningen, Nederland, 54 (2)
Ook verschenen als handelsuitgave
Tutors Wassink, Prof. Dr. E.C.
Graduation date 1954-06-03
Dissertation no. 185
Author abstract show abstract
Since temperature is an important influence in the activity of most metabolic processes, its influence was examined in some long-day plants, Spinacia oleracea, Brassica, Hyoscyamus niger. If during the dark period respiration were the determining factor, flowering response should increase or decrease with temperature.

In spinach, flowering response increased with temperature up to 13°C, in Brassica and Hyoscyamus no such optimum temperature was found.

Flowering was, however, promoted in Brassica plants by cold nights at the beginning of the experiment. So several processes interfere in flowering, one of them may be respiration. In long-day plants a short photoperiod in the middle of a long night induced flowering. A temperature of 2°C during this illumination retarded flowering.

So the photochemical reaction was closely related to a biochemical one.

No relation was found between flowering response and starch hydrolysis during darkness. Sucrose applied to the plant increased flowering response with a day- length of 10 h, while stronger light had no influence.

More knowledge of plant biochemistry was required to indicate which processes were involved.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,185
Keyword(s) (cab) plant physiology / photoperiodism / light regime / metabolism / night temperature
Categories Plant Physiology
Publication type PhD thesis
Language English
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