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 104008
Title Use in plant breeding of acute, chronic or fractionated doses of X-rays or fast neutrons as illustrated with leaves of Saintpaulia
show extra info.
C. Broertjes
Author(s) Broertjes, C.
Publisher Wageningen : Centre for Agricultural Publishing and Documentation
Publication year 1971
Description XII, 74 p
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
ISBN 9022003892
Tutors Sneep, Prof. Dr. Ir. J.
Graduation date 1972-06-23
Dissertation no. 519
Author abstract show abstract

The parameters used were survival of irradiated leaves of S. ionantha , production of adventitious plantlets at the base of the petiole and mutation frequency.

The differences between unfiltered X-rays from a 250/25 deep therapy apparatus and fast neutrons from a degraded fissions spectrum was slight and sometimes negligible. A striking dose rate effect was observed, especially with X-rays. In fractionation experiments a protective mechanism was induced in the leaves by pre-irradiation with either type of radiation. This mechanism reached a maximum after 8-12 h. Then the extent of the protection was equivalent to 3 krad X-rays or 1.5 krad fast neutrons after a single pre-treatment with the optimum initial dose of 500 rad, X-rays or fast neutrons. A 10-15 fold irradiation with this dose, separated by 8-h intervals, induced a protection of 6-7 krad X-rays or 3-4 krad fast neutrons.

Several of the treatments result in a higher number of mutants per 100 irradiated leaves compared with the optimum acute dose of 3 krad X-rays or 1.5 krad fast neutrons.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,519
FORUM ; STACKS ; NN08200,519
Keyword(s) (cab) gesneriaceae / mutations / ornamental plants / plant breeding / radiation
Categories Plant Breeding and Genetics (General) / Scrophulariales
Publication type PhD thesis
Language English
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.