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  1. Article ; Online: Anatomical and physiological responses of

    Cipriano, Rosiane / Martins, João Paulo Rodrigues / Conde, Lorenzo Toscano / da Silva, Mariela Mattos / Silva, Diolina Moura / Gontijo, Andreia Barcelos Passos Lima / Falqueto, Antelmo Ralph

    PeerJ

    2023  Volume 11, Page(s) e14624

    Abstract: Salt stress is one of the most severe abiotic stresses affecting plant growth and development. The application of silicon (Si) is an alternative that can increase the tolerance of plants to various types of biotic and abiotic stresses. The objective was ... ...

    Abstract Salt stress is one of the most severe abiotic stresses affecting plant growth and development. The application of silicon (Si) is an alternative that can increase the tolerance of plants to various types of biotic and abiotic stresses. The objective was to evaluate salt stress's effect
    MeSH term(s) Sodium Chloride/pharmacology ; Silicon/pharmacology ; Bromeliaceae/metabolism ; Photosynthesis ; Photosystem II Protein Complex/metabolism
    Chemical Substances Sodium Chloride (451W47IQ8X) ; Silicon (Z4152N8IUI) ; Photosystem II Protein Complex
    Language English
    Publishing date 2023-01-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2703241-3
    ISSN 2167-8359 ; 2167-8359
    ISSN (online) 2167-8359
    ISSN 2167-8359
    DOI 10.7717/peerj.14624
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Biochemical and physiological aspects of restinga herbaceous plants tolerance to iron ore tailing plume along the coastal region of Espírito Santo-Brazil

    Lana-Costa, Jaciara / da Silva, Mariela Mattos / Martins, Auxiliadora Oliveira / Guarnier, Julia Cristina / Silva Junior, Romário de Oliveira / Silva, Diolina Moura / Nunes-Nesi, Adriano / Araújo, Wagner L.

    Environmental and experimental botany. 2021 Nov., v. 191

    2021  

    Abstract: In Brazil, the worst environmental disaster involving mining dams was the collapse of the Fundão tailing dam, in 2015. This accident affected directly the ecosystems of the regions surrounding the Doce River Basin. After continuous contamination of soils ...

    Abstract In Brazil, the worst environmental disaster involving mining dams was the collapse of the Fundão tailing dam, in 2015. This accident affected directly the ecosystems of the regions surrounding the Doce River Basin. After continuous contamination of soils with heavy metals, only plants able to cope with the toxic effects of these elements can survive under this stressful environment. Thus, the main goal of this study was to carry out a detailed post-disaster analysis during two sampling periods to identify physiological and biochemical markers allowing us to understand the metabolic impact of heavy metals on Restinga herbaceous species. We determined the concentrations of heavy metals and antioxidant compounds, and further performed gas exchange analyses coupled with detailed biochemical analyses. These analyses were performed in two herbaceous species at seven Restinga stations along the coastal region of Espírito Santo - Brazil. The deposition of heavy metals such as iron and manganese varied considerably between the seven sampling stations and adaptive mechanisms to cope with excessive metals levels were verified in the herbaceous species. We observed several physiological and biochemical responses to metals that indicated potential adaptive mechanisms. Adjustments in the photosynthetic-related parameters including an acute reduction in stomatal conductance and transpiration rates associated with high stomatal resistance were noticed. Moreover, gradual reduction in pigments levels from the most distant stations to the ones closest to the Doce River mouth was noted in herbaceous species. Changes in the metabolism of nitrogen as protein content, carbon, and antioxidants were also noticed. Notably, variable responses according to the species and sample period demonstrate the further need for analysis over time to confirm the identified bioindicators.
    Keywords accidents ; antioxidants ; carbon ; coasts ; gas exchange ; herbaceous plants ; manganese ; metabolism ; nitrogen ; protein content ; stomatal conductance ; toxicity ; watersheds ; Brazil
    Language English
    Dates of publication 2021-11
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 195968-2
    ISSN 0098-8472
    ISSN 0098-8472
    DOI 10.1016/j.envexpbot.2021.104618
    Database NAL-Catalogue (AGRICOLA)

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