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Open AccessArticle

In Vitro Regeneration of Capparis spinosa L. by Using a Temporary Immersion System

1
Department of Agricultural, Food and Forest Sciences (SAAF), University of Palermo, 90128 Palermo, Italy
2
Department of Architecture (DARCH), University of Palermo, 90128 Palermo, Italy
*
Author to whom correspondence should be addressed.
Plants 2019, 8(6), 177; https://doi.org/10.3390/plants8060177
Received: 21 May 2019 / Revised: 14 June 2019 / Accepted: 14 June 2019 / Published: 16 June 2019
(This article belongs to the Section Plant Development and Morphogenesis)
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Abstract

Three caper (Capparis spinosa L.) biotypes grown on the Sicilian island of Salina (38°33′49″ N) were micropropagated to evaluate two different in vitro culture systems: one using the traditional solid medium, and the other based on liquid culture in a PlantForm bioreactor. PlantForm is a temporary immersion system (TIS), a new propagation method in which the shoots undergo temporary immersion in a liquid medium in order to avoid the accumulation of gas through forced ventilation. This study proposes a protocol to improve the efficiency of in vitro propagation of caper plants, while also reducing production costs, because of the elimination of the gelling agent, and manual labor, requiring limited subcultures and posing minimal contamination risks. Our results show that the caper shoots propagated in bioreactors demonstrated good adaptability and better growth rates than those grown in the conventional system. Statistically significant differences were observed between plants grown in the PlantForm liquid culture and those grown in solid medium regarding the number and length of shoots, which were further promoted by the addition of plant growth regulators (PGRs). The relative growth and real proliferation rate of the caper explants were higher when using meta-Topolin than when using 6-benzylaminopurine as a PGR. Overall, the TIS improved in vitro caper culture by promoting the proliferation, length, and vigor of the shoots. View Full-Text
Keywords: Capparis spinosa; PlantForm bioreactor; micropropagation; temporary immersion system (TIS) Capparis spinosa; PlantForm bioreactor; micropropagation; temporary immersion system (TIS)
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Gianguzzi, V.; Inglese, P.; Barone, E.; Sottile, F. In Vitro Regeneration of Capparis spinosa L. by Using a Temporary Immersion System. Plants 2019, 8, 177.

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