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Klagenfurt am Wörthersee, Austria

Bodner G.,University of Natural Resources and Life Sciences, Vienna | Leitner D.,University of Vienna | Nakhforoosh A.,University of Natural Resources and Life Sciences, Vienna | Sobotik M.,Institute of Plant Sociology | And 2 more authors.
Frontiers in Plant Science | Year: 2013

Plant root systems have a key role in ecology and agronomy. In spite of fast increase in root studies, still there is no classification that allows distinguishing among distinctive characteristics within the diversity of rooting strategies. Our hypothesis is that a multivariate approach for "plant functional type" identification in ecology can be applied to the classification of root systems. The classification method presented is based on a data-defined statistical procedure without a priori decision on the classifiers. The study demonstrates that principal component based rooting types provide efficient and meaningful multi-trait classifiers. The classification method is exemplified with simulated root architectures and morphological field data. Simulated root architectures showed that morphological attributes with spatial distribution parameters capture most distinctive features within root system diversity. While developmental type (tap vs. shoot-borne systems) is a strong, but coarse classifier, topological traits provide the most detailed differentiation among distinctive groups. Adequacy of commonly available morphologic traits for classification is supported by field data. Rooting types emerging from measured data, mainly distinguished by diameter/weight and density dominated types. Similarity of root systems within distinctive groups was the joint result of phylogenetic relation and environmental as well as human selection pressure. We concluded that the data-define classification is appropriate for integration of knowledge obtained with different root measurement methods and at various scales. Currently root morphology is the most promising basis for classification due to widely used common measurement protocols. To capture details of root diversity efforts in architectural measurement techniques are essential. © 2013 Bodner, Leitner, Nakhforoosh, Sobotik, Moder and Kaul. Source

Tarshis L.G.,Urals State Pedagogical University | Tarshis G.I.,Urals State Pedagogical University | Morozova L.M.,Russian Academy of Sciences | Ektova S.N.,Russian Academy of Sciences | Sobotik M.,Institute of Plant Sociology
Contemporary Problems of Ecology | Year: 2012

Morphological and anatomical features of underground organs of 12 species of Magnoliophyta plants growing in the tundra of the Yamal Peninsula were studied. The structural attributes of roots and rhizomes used for their identification and important for understanding of the adaptation of species to extreme conditions were determined. © Pleiades Publishing, Ltd., 2012. Source

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