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 104071
Title Carboxylates and the uptake of ammonium by excised maize roots
show extra info.
[door] H. Breteler
Author(s) Breteler, H.
Publisher Wageningen : Pudoc
Publication year 1975
Description 99 p.
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
ISBN 9022005704
Tutors Schuffelen, Prof. Dr. A.C.
Graduation date 1975-05-14
Dissertation no. 622
Author abstract show abstract
The effect of carboxylates (organic acid anions) on NH 4 uptake was studied by changing the carboxylate level of roots prior to uptake experi ments. Succinate was the most effective stimulator of ammonium uptake. The oxocarboxylates (α-oxoglutarate, oxaloacetate and pyruvate) and malate also promoted NH 4 entry. Preloading of roots with citrate, acetate, oxalate, glyoxylate or malonate reduced subsequent ammonium uptake. It is concluded that oxocarboxylates are important compounds in both the assimilation and the uptake process of ammonium. All carboxylates tested enhanced K uptake, but repressed NO 3 uptake, except citrate which increased nitrate absorption. Carboxylate stimulation of NH 4 entry showed metabolic as well as non-metabolic aspects.
Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,622
FORUM ; STACKS ; NN08200,622
Keyword(s) (cab) assimilation / experiments / in vitro / maize / nitrogen / organic compounds / phosphorus / plant physiology / plants / sulfur / zea mays
Categories Maize
Publication type PhD thesis
Language English
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