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Open AccessArticle

Comparison of Biostimulant Treatments in Acmella oleracea Cultivation for Alkylamides Production

1
DAFNAE, Department of Agronomy, Food, Natural Resources, Animals and Environment, Agripolis Campus, University of Padova, 35020 Legnaro (PD), Italy
2
Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy
3
Landlab Srl, 36050 Quinto Vicentino, Vicenza, Italy
4
Indena SpA, 20090 Settala, Milano, Italy
*
Author to whom correspondence should be addressed.
Plants 2020, 9(7), 818; https://doi.org/10.3390/plants9070818
Received: 31 May 2020 / Revised: 23 June 2020 / Accepted: 24 June 2020 / Published: 29 June 2020
(This article belongs to the Special Issue Biostimulants in Plants Science)
Acmella oleracea is a promising cosmetic, nutraceutical, and pharmaceutical ingredient, and plants with high levels of active compounds are needed in the market. Cultivation can be valuable if sufficient levels of alkylamides are present in plant material. In this regard the application of biostimulants can be an innovative approach to increase yield of cultivation or bioactive compound levels. A. oleracea plants were cultivated in Northern Italy in an experimental site using three different types of biostimulants, triacontanol-based mixture (Tria), an extract from plant tissues (LL017), and seaweed extract (Swe). Plants were grown in the field in two different growing seasons (2018 and 2019). After treatments inflorescences were harvested and the quali-quantitative analysis of alkylamides and polyphenols was performed. Treated and control plants were compared for yields, morphometric measurements, quali-quantitative composition in secondary metabolites. Overall results show that both triacontanol-based mixture and the LL017 positively influenced plant growth (Tria >+ 22%; LL017 >+ 25%) and flower production (Tria >+ 34%; LL017 >+ 56%). The amount of alkylamides and polyphenols in flowers were between 2.0–5.2% and 0.03–0.50%, respectively. Biostimulant treatments ensure higher cultivation yields and allow maintenance of the alkylamide and polyphenol levels based on % (w/w), thus offering an advantage in the final quantity of extractable chemicals. Furthermore, data revealed that samples harvested in late season show a decrease of polyphenols.
Keywords: Acmella oleracea; alkylammides; biostimulation; LC-MS; NMR; open field cultivation; triacontanol Acmella oleracea; alkylammides; biostimulation; LC-MS; NMR; open field cultivation; triacontanol
MDPI and ACS Style

Sut, S.; Ferrarese, I.; Shrestha, S.S.; Kumar, G.; Slaviero, A.; Sello, S.; Altissimo, A.; Pagni, L.; Gattesco, F.; Dall’Acqua, S. Comparison of Biostimulant Treatments in Acmella oleracea Cultivation for Alkylamides Production. Plants 2020, 9, 818.

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