Logo do repositório
 
Publicação

Melatonin Improves Drought Tolerance in Zinnia elegans Through Osmotic Adjustment and Stomatal Regulation

2025-11-07Artigo científico Acesso aberto
Ver registo simples
dc.contributor.authorCoêlho, Ester dos Santos
dc.contributor.authorRibeiro, João Everthon da Silva
dc.contributor.authorSilva, Elania Freire da
dc.contributor.authorLima, John Victor Lucas
dc.contributor.authorGomes, Ingrid Justino
dc.contributor.authorOliveira, Pablo Henrique de Almeida
dc.contributor.authorSilva, Antonio Gideilson Correia da
dc.contributor.authorFernandes, Bruno Caio Chaves
dc.contributor.authorRodrigues, Ana Paula
dc.contributor.authorSilveira, Lindomar Maria da
dc.contributor.authorBarros Júnior, Aurélio Paes
dc.contributor.institutionDCT - Departamento de Ciências da Terra
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2026-02-05T10:48:01Z
dc.date.available2026-02-05T10:48:01Z
dc.date.issued2025-11-07
dc.descriptionPublisher Copyright: © 2025 by the authors.
dc.description.abstractWater stress is the main abiotic factor that limits the development and commercial quality of ornamental plants, such as Zinnia elegans. This study aimed to evaluate the ability of exogenous melatonin (MEL) to attenuate the deleterious effects of water deficit by modulating stomatal physiological, biochemical and structural parameters. Z. elegans plants were subjected to four water regimes (80% FC, 20% FC, early stress and late stress) with (1.0 mM) and without MEL application. Severe water stress (20% FC) drastically reduced the rate of CO2 assimilation (A) by 43.81% and stomatal conductance (gs) by 68.96%. However, the application of MEL significantly mitigated this damage, resulting in an increase in A of 26.99% gs of 43.75%, and relative water content of 28% in plants under severe stress compared with those in untreated stressed plants. The mechanism of action of MEL involves the modulation of stomatal motion and, as suggested, the promotion of osmotic fit and the protection of membrane integrity and photochemical efficiency. Exogenous melatonin acts as an effective bioregulator, improving the tolerance of Z. elegans to water deficit and sustaining its physiological performance and ornamental potential under stress conditions.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent24
dc.format.extent6375834
dc.identifier.doi10.3390/agronomy15112571
dc.identifier.issn2073-4395
dc.identifier.otherPURE: 152117102
dc.identifier.otherPURE UUID: 6f5d11e3-5300-460f-a8a6-4ddc8bad98e5
dc.identifier.otherScopus: 105023070166
dc.identifier.otherWOS: 001623452000001
dc.identifier.urihttp://hdl.handle.net/10362/200026
dc.identifier.urlhttps://www.scopus.com/pages/publications/105023070166
dc.identifier.urlhttps://www.webofscience.com/wos/woscc/full-record/WOS:001623452000001
dc.language.isoeng
dc.peerreviewedyes
dc.subjectBiostimulant
dc.subjectGas exchange
dc.subjectOrnamental plant
dc.subjectOsmotic adjustment
dc.subjectPhotochemical efficiency
dc.subjectWater stress
dc.subjectAgronomy and Crop Science
dc.titleMelatonin Improves Drought Tolerance in Zinnia elegans Through Osmotic Adjustment and Stomatal Regulationen
dc.typejournal article
degois.publication.firstPage1
degois.publication.issue11
degois.publication.lastPage24
degois.publication.titleAgronomy
degois.publication.volume15
dspace.entity.typePublication
rcaap.rightsopenAccess

Ficheiros

Principais
A mostrar 1 - 1 de 1
Miniatura
Nome:
Co_lho_et_al._2025_..pdf
Tamanho:
6.08 MB
Formato:
Adobe Portable Document Format
Ver/Abrir

Coleções

Home collection (FCT)