Influence of CO2, moisture and nutrients on the formation of Lammas growth and prolepsis in seedlings of Pinus silvestris L
Aldén, Torsten
Abstract
Results are presented from a study concerning the influence of environmental factors on the formation of summer shoots in young plants of Pinus silvestris L. grown in plastic green houses. A close relationship is found between the studied factors: CO2, water, nutrients and the occurrence of summer shoots. Poor environmental conditions during the first year followed by improved conditions in the following year resulted in a great number of plants with summer shoots, whereas favourable conditions during the first year resulted in a low number of plants with summer shoots the following year. According to these results the conclusion is drawn that environmental conditions and especially those of the preceding year have a great influence on the formation of summer shoots and on the shoot growth as well. As a hypothesis it is discussed that carbohydrates in the plant may influence the formation of summer shoots and that this influence is mediated by growth regulators.
Keywords
Pinus silvestris L.; seedlings; CO2; lammas; prolepsis
Published in
Studia Forestalia Suecica
1971,
Publisher: Skogshögskolan
Permanent link to this page (URI)
https://res.slu.se/id/publ/125531