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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 104165
Title Shortening the juvenile phase for flowering
show extra info.
Moustafa Kamal M.T. Higazy
Author(s) Higazy, M.K.M.T.
Publisher Wageningen : Veenman
Publication year 1962
Description VIII, 54 p ill
Series title Mededelingen Landbouwhogeschool Wageningen (62-8)
Notes Proefschrift Wageningen
Ook verschenen als handelsuitgave
Tutors Wellensiek, Prof. Dr. Ir. S.J.
Graduation date 1962-10-03
Dissertation no. 331
Author abstract show abstract
Higazy tried to determine whether the duration of the juvenile phase for flowering was a fixed character or whether it could be influenced by external growth factors.

Lunaria biennis was chosen as a cold-requiring biennial, Silene armeria as a long-day plant and Salvia occidentalis as a short-day plant. In L. biennis photosynthesis shortened the juvenile phase. In general young plants could not be vernalized and especially in dim light remained completely juvenile. Older plants after either bright light or dim needed relatively little cold. There was an intermediate transitory stage, requiring more cold the younger the plants, especially after dim light. Incomplete vernalization resulted mainly in lateral flower buds, which was explained by leaf vernalization. Soil moisture, N, P and K hardly shortened the juvenile phase. Gibberellic acid (GA) lowered the percentage of generative plants in every age group for bright light after vernalization during 12 weeks, and hence tended to maintain juvenility. GA accelerated however the realization of flower bud formation after both bright or dim light.

The short juvenile phase of S. armeria could be reduced by 18 to 27 days of bright light. GA reduced it only a little, especially with bright light. Salvia occidentalis tended to flower more if propagated vegetatively than from seed. Light intensity had no influence and GA only a slight influence.

So factors promoting vegetative growth and prolonging active growth would shorten the juvenile phase of herbaceous plants.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,331
FORUM ; STACKS ; NN08200,331
Keyword(s) (cab) plant physiology / plant development / flowers / flowering / ornamental plants / forcing
Categories Plant Growth
Publication type PhD thesis
Language English
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