Taproot
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As taproot a is in plants root denotes that develops from the radicle (radicle) to the main root and the vertically growing in the soil. From the taproot arise obliquely or horizontally extending lateral roots of the first order, so it is part of a heterogeneous root system ( allorhizia ).
The taproot is strongly developed. It exceeds the lateral roots in length and diameter. It is characteristic of many gymnosperms and dicots . The taproot can be slightly thickened or, as a storage organ, significantly thickened (as a beet , as with the sugar beet ). Sprouting roots are missing here. Trees that retain the taproot system in the fully grown adult stage include firs , pines and oaks . Plants with taproots are common in dry and deep soils and also colonize crevices.
If the taproot emerges from strongly branched shoot bases, this growth form is called Pleiokorm taproot. One example is the scabies knapweed .
The opposite of the tap roots are the shallow roots .
supporting documents
- ^ A b Andreas Bresinsky , Christian Körner , Joachim W. Kadereit , Gunther Neuhaus , Uwe Sonnewald : Strasburger - Textbook of Botany. Founded by E. Strasburger. 36th edition. Spektrum Akademischer Verlag, Heidelberg 2008, ISBN 978-3-8274-1455-7 , p. 214.
- ^ Gerhard Wagenitz : Dictionary of Botany. The terms in their historical context. 2nd, expanded edition. Spektrum Akademischer Verlag, Heidelberg / Berlin 2003, ISBN 3-8274-1398-2 , p. 239.
- ^ A b c Werner Rothmaler: Excursion flora from Germany. Volume 4. Vascular Plants: Critical Volume . 10th edition. Elsevier, Munich 2005, ISBN 3-8274-1496-2 , p. 46f.
