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The effect of nitrogen fertigation and harvesting time on plant growth and chemical composition of centaurea raphanina subsp. mixta (DC.) Runemark

dc.contributor.authorPetropoulos, Spyridon Α.
dc.contributor.authorFernandes, Ângela
dc.contributor.authorDias, Maria Inês
dc.contributor.authorPereira, Carla
dc.contributor.authorCalhelha, Ricardo C.
dc.contributor.authorIvanov, Marija
dc.contributor.authorSoković, Marina
dc.contributor.authorFerreira, Isabel C.F.R.
dc.contributor.authorBarros, Lillian
dc.date.accessioned2018-02-19T10:00:00Z
dc.date.accessioned2021-02-27T17:20:55Z
dc.date.available2018-01-19T10:00:00Z
dc.date.available2021-02-27T17:20:55Z
dc.date.issued2020
dc.description.abstractThe aim of the present study was to evaluate the effect of nitrogen fertigation (0, 200, 400, and 600 ppm of total nitrogen) and harvesting time (9 March 2018 and 19 April 2018) on the plant growth, chemical composition, and bioactive properties of Centaurea raphanina subsp. mixta plants. The highest yield of fresh leaves was observed for the treatment of 200 ppm of N without compromising nutritional value. The increasing nitrogen levels resulted in an increase of a- and total tocopherols and sugars content, especially in the second harvest for tocopherols and in the first harvest for sugars. Similarly, total organic acids and oxalic acid content increased with increasing nitrogen levels in both harvests, while fatty acids composition had a varied response to the tested factors. Pinocembrin neohesperidoside and pinocembrin acetyl neohesperidoside isomer II were the most abundant phenolic compounds with the highest content being observed in the control treatment of the first and second harvest, respectively. The highest antioxidant activity was observed for the control and the 600 ppm treatments of the second harvest for the OxHLIA and TBARS assays, respectively, probably due to the high content of pinocembrin acetyl neohesperidoside isomer II and a-tocopherol, respectively. Finally, cytotoxic effects and antimicrobial properties showed a varied response depending on the treatment. In conclusion, C. raphanina subsp. mixta has low requirements of nitrogen to achieve the highest yield, while a varied response to the tested fertigation treatments and harvesting time was observed in terms of the chemical composition and the bioactive properties.en_EN
dc.description.sponsorshipThe authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support through national funds FCT/MCTES to CIMO (UIDB/00690/2020). L. Barros, A. Fernandes, M.I. Dias and R.C. Calhelha also thank the national funding by FCT—Foundation for Science and Technology, P.I., through the institutional scientific employment program-contract; C. Pereira though the celebration of program-contract foreseen in No. 4, 5, and 6 of article 23º of Decree-Law No. 57/2016, of 29th August, amended by Law No. 57/2017, of 19th July. The authors are grateful to the FEDER-Interreg España-Portugal programme for financial support through the project 0377_Iberphenol_6_E; and to the Ministry of Education, Science and Technological Development of Republic of Serbia (451-03-68/2020-14/200007). Acknowledgments: The authors would like to thank Kafetzopoulos George and Simopoulou Sofia for their assistance throughout the experiment.
dc.description.versioninfo:eu-repo/semantics/publishedVersionen_EN
dc.identifier.citationPetropoulos, Spyridon Α.; Fernandes, Ângela; Dias, Maria Inês; Pereira, Carla; Calhelha, Ricardo C.; Ivanov, Marija; Soković, Marina; Ferreira, Isabel C.F.R.; Barros, Lillian (2020). The effect of nitrogen fertigation and harvesting time on plant growth and chemical composition of centaurea raphanina subsp. mixta (DC.) Runemark. Molecules. ISSN 1420-3049. 25:14, p. 1-21en_EN
dc.identifier.doi10.3390/molecules25143175en_EN
dc.identifier.urihttp://hdl.handle.net/10198/23405
dc.language.isoeng
dc.peerreviewedyesen_EN
dc.subjectAntimicrobial activitiesen_EN
dc.subjectAntioxidant activityen_EN
dc.subjectCytotoxic effectsen_EN
dc.subjectNitrogen fertilizationen_EN
dc.subjectOrganic acidsen_EN
dc.subjectPhenolic compoundsen_EN
dc.subjectWild edible greensen_EN
dc.titleThe effect of nitrogen fertigation and harvesting time on plant growth and chemical composition of centaurea raphanina subsp. mixta (DC.) Runemarken_EN
dc.typejournal article
dspace.entity.typePublication
person.familyNameFernandes
person.familyNameDias
person.familyNamePereira
person.familyNameCalhelha
person.familyNameFerreira
person.familyNameBarros
person.givenNameÂngela
person.givenNameMaria Inês
person.givenNameCarla
person.givenNameRicardo C.
person.givenNameIsabel C.F.R.
person.givenNameLillian
person.identifier1415151
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person.identifier.orcid0000-0001-8744-7814
person.identifier.orcid0000-0003-0093-771X
person.identifier.orcid0000-0002-6801-4578
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person.identifier.orcid0000-0002-9050-5189
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rcaap.rightsopenAccessen_EN
rcaap.typearticleen_EN
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