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THE INDUCTION OF FLOWERING IN NICOTIANA. III. VARIATIONS IN THE LEVEL OF ENDOGENOUS GROWTH SUBSTANCES
Author(s) -
Nitsch J. P.,
Nitsch C.
Publication year - 1965
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1965.tb06826.x
Subject(s) - biology , avena , nicotiana tabacum , gibberellin , photoperiodism , botany , shoot , cultivar , apex (geometry) , nicotiana , solanaceae , horticulture , biochemistry , gene
A chromatographic investigation of the native growth substances active on the Avena first‐internode test has shown the existence of at least five different peaks of activity in methanolic extracts of a short‐day and a long‐day Nicotiana, N. tabacum cultivar ‘Maryland Mammoth’ and N. sylvestris. Some of these substances are active on the dwarf‐maize test for gibberellins. The levels of the various substances have been determined in the adult leaf, the immature leaf, and the tip of the shoot. Their variations have been followed during the shifting of the plants from a noninductive to an inductive photoperiod in relation to the transition of the terminal apex from the vegetative to the reproductive state.