<b>Callus induction in sempre-viva (<em>Syngonanthus mucugensis</em> Giulietti) using different types of explants and BAP concentrations</b> - DOI: 10.4025/actascibiolsci.v30i3.3624

Abstract

Sempre-viva-de-mucugê [Syngonanthus mucugensis – Eriocaulaceae] is a plant with great ornamental value characterized by the durability of its inflorescences, which remains even after collected and dried. The sexual propagation of this species results in disuniform plants, as it is genetically segregating; in addition, this species is currently endangered, with collection therefore restricted to its region of origin. Thus, tissue culture becomes a viable alternative for the formation of new plants. This study aimed to evaluate the in vitro induction of callus in Syngonanthus mucugensis using different BAP concentrations. The experimental design was completely randomized, with each treatment containing 4 repetitions and each repetition formed by 4 explants. The explants used were seedlings cultivated in vitro and their nodal segments. The culture medium used was MS (half-strength concentrations) supplemented with 0.0; 0.89; 1.78; 3.55; 7.10; 14.21 and 28.42 µM of BAP. At 60 days, the survival of the explants and the percentage of formation of callus were evaluated. It was verified that seedlings and nodal segments of Syngonanthus mucugensis are responsive explants to the formation of friable callus, with significant production obtained using the 1.78 and 3.55 µM BAP concentrations.