Library Catalogue

Library Catalogue

  • external user (warningwarning)
  • Log in as
  • About the Catalogue

    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 104365
Title Photoperiodiciteit bij Sorghum vulgare Pers.
show extra info.
door N.C. Keulemans
Author(s) Keulemans, N.C.
Publisher Wageningen : [s.n.]
Publication year 1959
Description 107 p.
Notes Proefschrift Wageningen
Tutors Coolhaas, Prof. Dr. Ir. C.
Graduation date 1959-06-17
Dissertation no. 258
Author abstract show abstract
Great millet of 35 varieties from several tropical and subtropical countries were tested for response to photoperiod. Some were analysed and measured extensively with photoperiods ranging from 5 to 24 h in a 24-h day. The development of the growing point was observed in relation to duration of growth from sowing until flower initiation and anthesis. Leaf number, elongation and length of leaves, stem and panicle, dry weight of plant and panicle were noted. The influence of solar radiation, intensity of supplementary light and temperature were, where possible, recorded.

Great millet was a short-day plant highly variable between varieties and types. A range of variations was found 'from quantitative to entirely qualitative responding plants'. In general photoperiodic sensitivity of types decreases with increasing distance from the equator. The optimum photoperiod was about 10 to 11 h in a 24-h day for 10-14 days (dependent on age). Flower initiation starts 4 to 5 weeks after sowing, anthesis 4 to 6 weeks later. A minimum age must be reached before flowering could be induced.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,258
Keyword(s) (cab) sorghum bicolor / plant physiology / light / photoperiodism / photoreceptors / botany / photoperiod / shade / oscillation / biological rhythms / life cycle
Categories Sorghum and Millets
Publication type PhD thesis
Language Dutch; Flemish
There are no comments yet. You can post the first one!
Post a comment

To support researchers to publish their research Open Access, deals have been negotiated with various publishers. Depending on the deal, a discount is provided for the author on the Article Processing Charges that need to be paid by the author to publish an article Open Access. A discount of 100% means that (after approval) the author does not have to pay Article Processing Charges.

For the approval of an Open Access deal for an article, the corresponding author of this article must be affiliated with Wageningen University & Research.

Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.