Extraction of bioactive compounds from Senecio brasiliensis using emergent technologies

Extracts of Senecio brasiliensis and Solanum viarum as Potential Antifungal and Bioherbicidal Agents

“…Extracts were obtained from different parts of S. brasiliensis (flowers, leaves, and stalks) and S. viarum (fruits and roots) by ultrasound-assisted extraction (UAE, using an ethanolic solution of 60 vol.%) using a high-intensity ultrasound processor of 400 W and 24 kHz (Model UP 400S, Hielscher Ultrasonics GmbH, Teltow, Germany) and following the methodology described by Confortin et al [9]. Preliminary tests were performed to define the operational conditions that would lead to the highest concentrations and yields of the extracts, resulting in the selection of ultrasound intensity of 85 W m −2 , pulse of 0.75 for 30 min, and temperature of 40 • C. The liquid phase was collected, and the solvent was completely removed by vacuum evaporation at 40 • C. The yields obtained for each botanical part of the substrates considered were calculated by Equation (1).…”

“…The yields obtained for each botanical part of the substrates considered are presented in Table 1 (a total of five samples were obtained from the extractions and used for determining their bioactivities). Table 1 also shows the typical distribution of phytochemicals extracted from these plants, according to works already published by our research group [8,9]. The antifungal activity of the extracts obtained by UAE of S. viarum and S. brasiliensis against F. graminearum and S. sclerotiorum is presented in Table 2.…”

“…The compounds usually identified in the extracts justify their antifungal potential [8,9]. Cytidine was described as responsible for the antifungal activity against A. niger and F. culmorum [45].…”

“…Moreover, this plant is resistant to adverse weather conditions, which provides it with a competitive advantage over native species. In this panorama, the control of the weed species S. brasiliensis and S. viarum is quite challenging, mainly due to their invasive nature and ability to adapt to a diversity of environments [8,9].…”

Applications and Market of Micro-Organism-Based and Plant-Based Inputs in Brazilian Agriculture

“…It is estimated that only 2400 species have been identified, and only 10% of the compounds found in plant biochemical defenses have been explored, indicating a vast field of scientific research yet to be investigated [89]. Plant-based insecticidal properties are referred to as secondary metabolites, such as phenols, alkaloids, and terpenoids, which are extracted from specific parts of plants such as leaves, flowers, seeds, or roots [90,91]. For instance, biochemical insecticides can induce some modes of action in target pest species, such as feeding disruption, growth inhibition, repellency, and modifications to their structure and physiology (Figure 2).…”