Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Polysaccharide-Based Integrated Nutrient Management System Enhances the Antioxidant Properties in Origanum dictamnus (Lamiaceae), a Local Endemic Plant of Crete with Antimicrobial Potential

Konstantinos A Paschalidis
* ,
Dimitrios Fanourakis
,
Georgios Tsaniklidis
ORCID logo ,
Vasileios A. Tzanakakis
,
Ioanna Kardamaki
,
Fotis Bilias
ORCID logo ,
Eftihia Samara
,
Ioannis Ipsilantis
ORCID logo ,
Katerina Grigoriadou
ORCID logo ,
Theodora Matsi
ORCID logo ,
Georgios Tsoktouridis
* ,
Nikos Krigas
Version 1 : Received: 31 December 2023 / Approved: 2 January 2024 / Online: 2 January 2024 (09:43:02 CET)

A peer-reviewed article of this Preprint also exists.

Paschalidis, K.; Fanourakis, D.; Tsaniklidis, G.; Tzanakakis, V.A.; Kardamaki, I.; Bilias, F.; Samara, E.; Ipsilantis, I.; Grigoriadou, K.; Matsi, T.; Tsoktouridis, G.; Krigas, N. A Polysaccharide-Based Integrated Nutrient Management System Enhances the Antioxidant Properties in Origanum dictamnus (Lamiaceae), a Valuable Local Endemic Plant of Crete. Polysaccharides 2024, 5, 28-48. Paschalidis, K.; Fanourakis, D.; Tsaniklidis, G.; Tzanakakis, V.A.; Kardamaki, I.; Bilias, F.; Samara, E.; Ipsilantis, I.; Grigoriadou, K.; Matsi, T.; Tsoktouridis, G.; Krigas, N. A Polysaccharide-Based Integrated Nutrient Management System Enhances the Antioxidant Properties in Origanum dictamnus (Lamiaceae), a Valuable Local Endemic Plant of Crete. Polysaccharides 2024, 5, 28-48.

Abstract

Origanum dictamnus L. (Lamiaceae), a local endemic plant of Crete (Greece), creates polysaccharide-containing subcuticular compartments presenting biological activity against phytopathogenic fungi, and, among others, significantly affecting the fungal cell wall polysaccharides. This field study introduces a fertilization scheme for O. dictamnus, which was developed and refined to optimize yield as well as critical herbal quality aspects. Five fertilization schemes were investigated, based on a polysaccharide-based Integrated Nutrient Management (INM), a mixture of chemical fertilizers and two biostimulants (not algae) via foliar and soil application. Plant growth, together with leaf chlorophyll fluorescence and colour (SPAD meter, DA meter, Chroma Meter) were determined. The leaf content of chlorophyll, three critical antioxidant compounds (carotenoids, flavonoids, phenols) and minerals were also assessed. Considering all three antioxidants together, the enhanced efficiency, non-toxic, water-soluble, polysaccharide-based INM by foliar application was the most stimulatory scheme, playing an important role in plant growth and development. The present field study provides for the first time baseline fertilization data improving key herbal quality features in O. dictamnus and unravels the attainment of high antioxidant properties. The latter may be exploited in favor of its further utilization as raw material for tea preparation, medicinal purposes, natural food flavoring and/or food preservative.

Keywords

INM; enhanced efficiency fertilizers; carotenoids; flavonoids; Greece; herbal quality; medicinal plant; phenols; biostimulant

Subject

Biology and Life Sciences, Agricultural Science and Agronomy

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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