Effects of Temperature, Photoperiod, and Provenance on Growth and Development of Scotch Pine Seedlings
Authors: Jensen, Keith F.; Gatherum, Gordon E.
Source: Forest Science, Volume 11, Number 2, 1 June 1965 , pp. 189-199(11)
Publisher: Society of American Foresters
Abstract:Growth and development of Pinus sylvestris L. seedlings were determined for 3 photoperiods, 2 temperatures, and 7 seed sources, ranging from Turkey to Germany. (1) Growth and development were affected appreciably by photoperiod, temperature, seed source and their interactions; (2) magnitude of the variation among seed sources appears to justify a more comprehensive evaluation of within-species variation to find suitable variants for plantings in Iowa; (3) photoperiod and temperature appear to be two environmental factors important in the process of natural selection within the species, even over the limited natural range of seed sources studied; and (4) some criteria have been obtained to test the feasibility of early selection of variants for field plantings in Iowa.
Document Type: Journal Article
Affiliations: Professor, Dept. of Forestry, Iowa State University
Publication date: 1 June 1965
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