Polymorphisme foliaire consécutif à la culture <i>in vitro</i> de <i>Vitis vinifera</i> L.
DOI:
https://doi.org/10.5073/vitis.1984.23.159-174Abstract
Pour l'espèce Vitis vinifera L. les variétés assainies par thermothérapie in vitro, replacées dans les conditions de culture au vignoble présentent une morphogenèse inattendue.
L'analyse discriminante portant sur des paramètres foliaires permet de différencier les plants témoins des plants issus de culture in vitro. Cette analyse montre également d'une part, que la température de traitement n'est pas responsable des modifications morphologiques; d'autre part, que ces caractéristiques nouvelles sont stables dans les conditions traditionnelles de culture au vignoble.
L'étude de la descendance végétative des plants modifiés révèle l'existence d'un gradient morphogénétique le long des sarments. La persistance des formes nouvelles n'est pas irréversible. La pratique de la taille est responsable du maintien artificiel d'un fonctionnement de type juvénile consécutif à la culture in vitro.
Leaf polymorphism after in vitro culture of Vitis vinifera L.
Virus-free varieties of Vitis vinifera obtained by in vitro heat therapy showed unexpected morphological features after transfer into the vineyard.
Discriminant multivariate analysis of the leaf characters revealed differences between the control plants and the plants from in vitro therapy. This analysis also showed on the one hand that heat treatment is not accountable for leaf modifications, on the other hand that these modifications are stable under vineyard conditions.
Study of cuttings from modified plants showed a morphogenetic gradient along shoots. The persistence of new forms is not irreversible. Pruning is responsable for the artificial maintainance of juvenility in consequence of in vitro culture.
Downloads
Published
Issue
Section
License
The content of VITIS is published under a Creative Commons Attribution 4.0 license. Any user is free to share and adapt (remix, transform, build upon) the content as long as the original publication is attributed (authors, title, year, journal, issue, pages) and any changes to the original are clearly labeled. We do not prohibit or charge a fee for reuse of published content. The use of general descriptive names, trade names, trademarks, and so forth in any publication herein, even if not specifically indicated, does not imply that these names are not protected by the relevant laws and regulations. The submitting author agrees to these terms on behalf of all co-authors when submitting a manuscript. Please be aware that this license cannot be revoked. All authors retain the copyright on their work and are able to enter into separate, additional contractual arrangements.