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Comparative studies on the germination of Scots pine and Norway spruce seed under different temperatures and photoperiods

Kamra, Siri Krishan (1967). Comparative studies on the germination of Scots pine and Norway spruce seed under different temperatures and photoperiods. Technical Report. Stockholm: Predecessors to SLU > Royal School of Forestry, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 51
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Abstract

1. The present paper deals with a comparison of the percentages and the rates of germination of samples of Scots pine and Norway spruce seed under different sets of temperatures and photoperiods. Ten samples each of Pinus silvestris L. and Picea abies (L.) Karst., some with high, others with lower germination percentages were taken for the experiments. The details of the material are given in Tables 1 and 2. 2. Four sets of germination conditions: three with 8 hours light daily and alternating temperature of 20-30°C and constant temperatures of 23°C and 20°C, and one with 24 hours light daily and 20°C were used. For further details of the sets, see the Methods. 3. There were no statistically significant differences among the germination percentages of the samples of Scots pine and Norway spruce seed under the four sets of conditions (cf. Tables 3 and 4). 4. The germination rates of severa1 samples appeared to be faster during the first few days of the tests at the alternating than at the constant temperatures under similar light conditions. However, from a certain point onward, which was different in the different cases, there were only small differences in the germination rates of the samples (cf. Figs. 1-20). Judging by all the samples and by the whole periods of the tests, the germination rate was not necessarily faster at the alternating than at the constant temperatures. 5. The germination tests under 8 and 24 hours light daily at 20°C did not show any consistent difference in both the species in the rate of germination, and practically no difference in the percentage of germination, under the two photoperiods. 6. The investigation has thus shown, that any of the four sets of conditions (I-IV) can be used for testing the germination percentage of Scots pine and Norway spruce seed.

Authors/Creators:Kamra, Siri Krishan
Title:Comparative studies on the germination of Scots pine and Norway spruce seed under different temperatures and photoperiods
Series/Journal:Studia forestalia Suecica (0039-3150)
Year of publishing :1967
Number:51
Number of Pages:16
Place of Publication:Stockholm
Publisher:Skogshögskolan
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
Obsolete subject words > NATURAL SCIENCES > Biology > Cell and molecular biology > Genetics
Keywords:germination, Scots pine, Norway spruce, seeds, temperatures, photoperiods
URN:NBN:urn:nbn:se:slu:epsilon-9-147
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-9-147
ID Code:5857
Department:Predecessors to SLU > Royal School of Forestry
Deposited By: Skogsbiblioteket Umeå
Deposited On:14 Mar 2011 00:00
Metadata Last Modified:17 Dec 2015 13:17

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