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Willkürliche Entwickelungsänderungen bei Pflanzen: Ein Beitrag zur Physiologie der Entwickelung (Classic Reprint) (German Edition) - Softcover

 
9781332473311: Willkürliche Entwickelungsänderungen bei Pflanzen: Ein Beitrag zur Physiologie der Entwickelung (Classic Reprint) (German Edition)

Synopsis

Excerpt from Willkürliche Entwickelungsänderungen bei Pflanzen: Ein Beitrag zur Physiologie der Entwickelung

K le b s Aenderungen der Entwickelun g. 1irdischen Ausläufer in Laubtriebe nachwies. Die Arbeiten von Knight fanden bis weit über die Mitte des Jahrhunderts hinaus keine Nachfolge. Die rein formale Morphologie be herrschte die Wissenschaft. Erst mit dem neu erwachten Interesse für die Physiologie, in Verbindung mit dem Siege der Darwinschen Theorie, wandte man sich den physiologischen Bedingungen der Pflanzenformen zu. Als einer der ersten hat Hofmeister in seiner „allgemeinen Morphologie (1868) die Bedeutung dieser F orschungsrichtung erkannt; er hat den mächtigen Einfluß äußerer Kräfte, besonders der Schwerkraft und des Lichtes auf die Gestaltung der Pflanzenorgane hervor gehoben, wenn auch seine Ansichten bei den damals noch sehr geringen Kenntnissen uns heute vielfach irrtümlich erscheinen. Von einer ganz neuen Seite griff Vöchting in seinem Werk über Organbildung (1878 und 1884) das Problem an. Indem er die weitgehende Teilbarkeit und Regenerationsfahigkeit der Pflanzen feststellte, führte er den wichtigen Nachweis, daß eine Gruppe von gleichartigen Cambiumzellen ganz. Ungleichartige Organe wie Sprosse und Wurzeln zu bilden vermag. Bei der Entscheidung, an welchem Orte solche Organe entstehen, sind nach Vöchting in erster Linie innere Ursachen, vor allem der von ihm entdeckte polare Gegensatz von Spitze und Basis wirksam, während außere Kräfte, wie Schwerkraft und Licht, erst in zweiter Linie in Betracht kommen.

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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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  • PublisherForgotten Books
  • Publication date2018
  • ISBN 10 1332473318
  • ISBN 13 9781332473311
  • BindingPaperback
  • Number of pages174

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