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Occurrence of gibberellin-like substances in Norway spruce (Picea abies (L.) Karst.) and their possible relation to growth and flowering

Dunberg, Arne (1974). Occurrence of gibberellin-like substances in Norway spruce (Picea abies (L.) Karst.) and their possible relation to growth and flowering. Technical Report. Stockholm: Predecessors to SLU > Royal School of Forestry, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 111
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Abstract

Growing shoots and young seedlings of Norway spruce (Picea abies) contain at least six different gibberellin-like substances; most probably none of them is identical to gibberellic acid or gibberellin A1. The gibberellin-like substances are all active in a specially designed spruce seedling bioassay, as well as in a number of traditional gibberellin bioassays. Young spruce seedlings grown in nutrient solution are retarded by the substances Amo-1618, B-995, and CCC. Both root and shoot growth are affected. Gibberellic acid counteracts the effects of all the retardants on shoot growth, and of Amo-1618 on root growth, but has no effect when supplied alone. Application of the growth retardants B-995 and CCC to spruce grafts in a seed orchard results in decreased flowering. Preliminary results show, that flowering and non-flowering grafted spruce clones display remarkable differences in the dynamics of gibberellin-like substances; a high content of these substances during the supposed time of flower bud initiation is correlated to good flowering ability. All these findings are consistent with the hypothesis, that gibberellins are intimately involved in the process of flower bud induction. Literature dealing with the occurrence and effects of gibberellins within the class Coniferopsida is summarized.

Authors/Creators:Dunberg, Arne
Title:Occurrence of gibberellin-like substances in Norway spruce (Picea abies (L.) Karst.) and their possible relation to growth and flowering
Series/Journal:Studia forestalia Suecica (0039-3150)
Year of publishing :1974
Number:111
Number of Pages:62
Place of Publication:Stockholm
Publisher:Skogshögskolan
ISBN for printed version:91-38-01783-0
ISSN:0039-3150
Language:English
Publication Type:Report
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Plant breeding
Keywords:gibberellins, coniferae, Picea abies
URN:NBN:urn:nbn:se:slu:epsilon-9-87
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-9-87
ID Code:5704
Department:Predecessors to SLU > Royal School of Forestry
Deposited By: Skogsbiblioteket Umeå
Deposited On:14 Feb 2011 00:00
Metadata Last Modified:13 Nov 2015 13:35

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