Soilless Cultivation of <i>Portulaca oleracea</i> Using Medicinal and Aromatic Plant Residues for Partial Peat Replacement
The industrial manufacturing of essential oils (EOs) generates a sizable volume of bulk solid waste (SW) that needs to be disposed of. The present study evaluated the potential of using <i>Origanum dubium</i> wastes (ODW) and <i>Sideritis cypria</i> waste (SCW) obtained after...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Horticulturae |
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| Online Access: | https://www.mdpi.com/2311-7524/9/4/474 |
| _version_ | 1797605205355790336 |
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| author | Antonios Chrysargyris Stavros Louka Spyridon A. Petropoulos Nikolaos Tzortzakis |
| author_facet | Antonios Chrysargyris Stavros Louka Spyridon A. Petropoulos Nikolaos Tzortzakis |
| author_sort | Antonios Chrysargyris |
| collection | DOAJ |
| description | The industrial manufacturing of essential oils (EOs) generates a sizable volume of bulk solid waste (SW) that needs to be disposed of. The present study evaluated the potential of using <i>Origanum dubium</i> wastes (ODW) and <i>Sideritis cypria</i> waste (SCW) obtained after EO distillation for partial peat substitution (0–5–10–20–40% <i>v</i>/<i>v</i>) in <i>Portulaca oleracea</i> production. Both ODW and SCW increased pH, electrical conductivity, organic matter, and mineral content, but negatively affected the total porosity and aeration of the growing media. Plant growth was inhibited, especially when high ratios of residues were used, and this was reflected by leaf stomatal conductance and chlorophyll decrease, as well as by the activation of several nonenzymatic (phenols, flavonoids, and antioxidant capacity) and enzymatic (catalase, superoxide dismutase, and peroxidase) mechanisms and the increase in lipid peroxidation and hydrogen peroxide, indicating stress conditions. Despite that both ODW and SCW were rich in minerals, plants could not accumulate them. It can be concluded that both ODW and SCW have the potential to be used in the growing media at low ratios up to 10%, with increased antioxidant content in the final product. Nonetheless, the growing media properties, i.e., total pore space and aeration, still need to be improved to result in sufficient yields. |
| first_indexed | 2024-03-11T04:57:48Z |
| format | Article |
| id | doaj.art-1f2b96dad93b4b8f8fd54ea8a813bc47 |
| institution | Directory Open Access Journal |
| issn | 2311-7524 |
| language | English |
| last_indexed | 2024-03-11T04:57:48Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Horticulturae |
| spelling | doaj.art-1f2b96dad93b4b8f8fd54ea8a813bc472023-11-17T19:29:15ZengMDPI AGHorticulturae2311-75242023-04-019447410.3390/horticulturae9040474Soilless Cultivation of <i>Portulaca oleracea</i> Using Medicinal and Aromatic Plant Residues for Partial Peat ReplacementAntonios Chrysargyris0Stavros Louka1Spyridon A. Petropoulos2Nikolaos Tzortzakis3Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Limassol 3603, CyprusDepartment of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Limassol 3603, CyprusDepartment of Agriculture, Crop Production and Rural Environment, University of Thessaly, 38446 Volos, GreeceDepartment of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Limassol 3603, CyprusThe industrial manufacturing of essential oils (EOs) generates a sizable volume of bulk solid waste (SW) that needs to be disposed of. The present study evaluated the potential of using <i>Origanum dubium</i> wastes (ODW) and <i>Sideritis cypria</i> waste (SCW) obtained after EO distillation for partial peat substitution (0–5–10–20–40% <i>v</i>/<i>v</i>) in <i>Portulaca oleracea</i> production. Both ODW and SCW increased pH, electrical conductivity, organic matter, and mineral content, but negatively affected the total porosity and aeration of the growing media. Plant growth was inhibited, especially when high ratios of residues were used, and this was reflected by leaf stomatal conductance and chlorophyll decrease, as well as by the activation of several nonenzymatic (phenols, flavonoids, and antioxidant capacity) and enzymatic (catalase, superoxide dismutase, and peroxidase) mechanisms and the increase in lipid peroxidation and hydrogen peroxide, indicating stress conditions. Despite that both ODW and SCW were rich in minerals, plants could not accumulate them. It can be concluded that both ODW and SCW have the potential to be used in the growing media at low ratios up to 10%, with increased antioxidant content in the final product. Nonetheless, the growing media properties, i.e., total pore space and aeration, still need to be improved to result in sufficient yields.https://www.mdpi.com/2311-7524/9/4/474purslanedistillation wasteplant growthpeatunexploited vegetablesantioxidants |
| spellingShingle | Antonios Chrysargyris Stavros Louka Spyridon A. Petropoulos Nikolaos Tzortzakis Soilless Cultivation of <i>Portulaca oleracea</i> Using Medicinal and Aromatic Plant Residues for Partial Peat Replacement Horticulturae purslane distillation waste plant growth peat unexploited vegetables antioxidants |
| title | Soilless Cultivation of <i>Portulaca oleracea</i> Using Medicinal and Aromatic Plant Residues for Partial Peat Replacement |
| title_full | Soilless Cultivation of <i>Portulaca oleracea</i> Using Medicinal and Aromatic Plant Residues for Partial Peat Replacement |
| title_fullStr | Soilless Cultivation of <i>Portulaca oleracea</i> Using Medicinal and Aromatic Plant Residues for Partial Peat Replacement |
| title_full_unstemmed | Soilless Cultivation of <i>Portulaca oleracea</i> Using Medicinal and Aromatic Plant Residues for Partial Peat Replacement |
| title_short | Soilless Cultivation of <i>Portulaca oleracea</i> Using Medicinal and Aromatic Plant Residues for Partial Peat Replacement |
| title_sort | soilless cultivation of i portulaca oleracea i using medicinal and aromatic plant residues for partial peat replacement |
| topic | purslane distillation waste plant growth peat unexploited vegetables antioxidants |
| url | https://www.mdpi.com/2311-7524/9/4/474 |
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