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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 104181
Title Responses of young maize plants to root temperatures
show extra info.
door W.P. Grobbelaar
Author(s) Grobbelaar, W.P.
Publisher Wageningen : Veenman
Publication year 1963
Description 71 p ill
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
Tutors Hart, Prof. Ir. M.L. 't
Graduation date 1963-07-05
Dissertation no. 352
Author abstract show abstract
The effect of root temperatures on growth, water uptake and ion uptake of the maize single cross K 64r X E 184 has been studied during the early vegetative phase in culture solution in temperature-controlled rooms. A root temperature range of 5°-40°C with 5°C increments, a constant air temperature of 20°C, and a constant light intensity were employed throughout.

The optimum temperature range for root growth was found to be 20°-30°C (distinctly less at 35°C, mainly by less seed-root growth), that for shoot growth 25°- 35°C. The influence of root temperature on shoot apices was also estimated. Leaf initiation and elongation were most rapid between 25° and 35°C, as also the total leaf length per plant. The longest ultimate individual leaf size was however reached between 15° and 25°C. An attempt was made to explain the influence of temperature on content of dry matter and water-soluble carbohydrate in roots and shoots. Root temperature influenced the relation root/shoot. An analysis of the net assimilation rate, transpiration rate and rate of ion uptake and proportional growth revealed interesting relations. The differences in proportional growth were associated with the proportional leaf area per plant. Root temperature did affect the uptake of NO 3 -, P, K, Ca and Mg. The influence of the internal diffusion pressure deficit on growth rate was also considered.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,352
FORUM ; STACKS ; NN08202,352
Keyword(s) (cab) zea mays / maize / plant physiology / plant development / botany / temperature / heat / plant vegetative organs
Categories Maize
Publication type PhD thesis
Language English
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