Micropropagation Effects on Juvenile Traits, Flower Differentiation, and Tree Architecture in Young Olive Trees
| Autor: | Oriano Navacchi, Veronica Giorgi, Tonino Cioccolanti, E.M. Lodolini, Davide Neri, Giuseppe Zuccherelli |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Canopy Ramification (botany) lcsh:S Flower differentiation food and beverages 04 agricultural and veterinary sciences Biology 01 natural sciences Acclimatization Olive trees vigor lcsh:Agriculture Cutting Horticulture Olea europaea L Micropropagation Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries juvenility in vitro propagation Agronomy and Crop Science cutting 010606 plant biology & botany |
| Zdroj: | Agronomy, Vol 10, Iss 1742, p 1742 (2020) Agronomy Volume 10 Issue 11 |
| ISSN: | 2073-4395 |
| Popis: | Olive micropropagation is nowadays possible but knowing if it induces juvenile traits and how juvenility, vigor and fruit productivity are affected is pivotal. Three trials were carried out during micropropagation and afterwards in the field. Three varieties were characterized during multiplication in vitro, after several subcultures. &lsquo Arbequina&rsquo revealed higher shoot miniaturization than &lsquo Coratina&rsquo and &lsquo Frantoio&rsquo and likely-juvenile shoots with three or four leaves per node. The &lsquo trees obtained from two- and three-leaves-per-node in vitro plantlets were compared to cuttings in the field. Two years after planting, flower-differentiated shoots were found in the apical part of the canopy in all tested trees while in this position the ramification was more intense on three-leaves-per-node trees. Architecture of &lsquo trees from micropropagation and cuttings was finally characterized in a high-density commercial grove. Micropropagated trees showed a well distributed and deep root system, a regular conical shape of the canopy, a higher number of primary branches, and a reproductive ability equivalent to cuttings. In conclusion, some juvenile traits and vigor may appear in vitro and last after ex vitro acclimation, but no more than two years in the field. |
| Databáze: | OpenAIRE |
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