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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 104563
Title Inhibition of growth and metabolism of Chlorella and some other plant types by calcium dipicrylamine and other poisons
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door Johan Frederik Bierhuizen
Author(s) Bierhuizen, J.F.
Publisher Wageningen : Veenman
Publication year 1957
Description 59 p.
Notes Proefschrift Wageningen  show all notes
Ook verschenen als: Mededelingen / Landbouwhogeschool Wageningen, Nederland, 57(7)
Ook verschenen als handelsuitgave
Tutors Wassink, Prof. Dr. E.C.
Graduation date 1957-07-05
Dissertation no. 230
Author abstract show abstract
If potassium is obtained from sea-water by precipitation with calcium dipicrylamine, potassium fertilizers and sea-water will be contaminated with a little dipicrylamine. The influence of calcium dipicrylamine on metabolism of Chlorella and some other aquatic and terrestrial plants was therefore studied. It inhibited photosynthesis even at lower concentrations (10 -6-10 -5M), than other inhibitors such as ethyl urethane, phenyl urethane, hydroxylamine, 2,4-dinitrophenol and sodium azide. Autotrophic growth was inhibited at almost the same concentration. But heterotrophic growth of Chlorella was less inhibited. Respiration was stimulated by up to 60 %, even at 10 -2M. At this concentration, glucose-stimulated respiration was 50 % inhibited but at least partly reversibly. The same degree of inhibition (not reversible by washing) was observed with light saturation as with light limitation in Chlorella photosynthesis. This suggested a specific enzyme- inhibitor, influencing certain dark reactions as well as the energy transfer in photosynthesis. Lower temperatures severely increased inhibition of photosynthesis in Chlorella.

Despite inhibition of growth and photosynthesis at low concentrations in water culture, the compound was less harmful in the field through the high adsorptive capacity of soil, especially of humus. Only with extreme artificial contamination was there a decrease in yield.

Online full textINTERNET
On paper FORUM ; STACKS ; 298E24
FORUM ; STACKS ; NN08202,230
Keyword(s) (cab) plant physiology / growth / plant development / metabolism / plant nutrition / assimilation / toxic substances / chemistry / indicator plants / chemical analysis / exposure / environmental degradation / kinetics / chemical factors / ecotoxicology
Categories Photosynthesis
Publication type PhD thesis
Language English
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