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Morphology and anatomy of anomalous short shoots in Pinus (Pinaceae) and their evolutionary meaning

Morphology and anatomy of anomalous short shoots in Pinus (Pinaceae) and their evolutionary meaning

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DÖRKEN, Veit Martin, Gerrit STEPHAN, Thomas STÜTZEL, 2010. Morphology and anatomy of anomalous short shoots in Pinus (Pinaceae) and their evolutionary meaning. In: Feddes Repertorium. 121(3-4), pp. 133-155. ISSN 0014-8962. eISSN 1522-239X

@article{Dorken2010Morph-30454, title={Morphology and anatomy of anomalous short shoots in Pinus (Pinaceae) and their evolutionary meaning}, year={2010}, doi={10.1002/fedr.201000006}, number={3-4}, volume={121}, issn={0014-8962}, journal={Feddes Repertorium}, pages={133--155}, author={Dörken, Veit Martin and Stephan, Gerrit and Stützel, Thomas} }

eng Morphology and anatomy of anomalous short shoots in Pinus (Pinaceae) and their evolutionary meaning 2015-03-20T10:07:42Z Stützel, Thomas Dörken, Veit Martin 2015-03-20T10:07:42Z Dörken, Veit Martin Stephan, Gerrit 2010 Recent Pinus -species are evergreen and have a typical long shoot/short shoot differentiation. For angiosperms we could show that this type of shoot differentiation is linked to deciduousness (Dörken & Stützel 2009). Evergreen angiosperms with prominent shoot differentiation are derived from deciduous ancestors. The primitive evergreen condition is however characterized by the absence of a shoot differentiation. Here it is therefore analysed if the shoot differentiation in Pinus could be regarded as a reminder of a deciduous ancestry. In such a context Pinus monophylla would be functionally closest to a primitive evergreen angiosperm and represent a nearly perfect secondary adaptation to the needs of an evergreen species. Morphology and anatomy of aberrant short shoots in Pinus -species have been analysed to test this hypothesis. We suppose that the ancestor of Pinus had several needle leaves inserted spirally on a well developed short shoot axis ending in a terminal bud, as it can be found in Larix today. Stützel, Thomas Stephan, Gerrit

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