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Combined Effect of Salt Stress and Nitrogen Level on the Primary Metabolism of Two Contrasting Hydroponically Grown Cichorium spinosum L. Ecotypes.
Chatzigianni, Martina; Savvas, Dimitrios; Papadopoulou, Evgenia-Anna; Aliferis, Konstantinos A; Ntatsi, Georgia.
Afiliação
  • Chatzigianni M; Laboratory of Vegetable Production, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece.
  • Savvas D; Laboratory of Vegetable Production, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece.
  • Papadopoulou EA; Laboratory of Pesticide Science, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece.
  • Aliferis KA; Laboratory of Pesticide Science, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece.
  • Ntatsi G; Department of Plant Science, Macdonald Campus, McGill University, Ste-Anne-de-Bellevue, QC H9X 3V9, Canada.
Biomolecules ; 13(4)2023 03 28.
Article em En | MEDLINE | ID: mdl-37189356
Stamnagathi (Cichorium spinosum L.) is an indigenous plant species well-known for its health-promoting properties. Salinity is a long-term issue with devastating consequences on land and farmers. Nitrogen (N) constitutes a crucial element for plant growth and development (chlorophyll, primary metabolites, etc.). Thus, it is of paramount importance to investigate the impact of salinity and N supply on plants' metabolism. Within this context, a study was conducted aiming to assess the impact of salinity and N stress on the primary metabolism of two contrasting ecotypes of stamnagathi (montane and seaside). Both ecotypes were exposed to three different salinity levels (0.3 mM-non-saline treatment, 20 mM-medium, and 40 mM-high salinity level) combined with two different total-N supply levels: a low-N at 4 mM and a high-N at 16 mM, respectively. The differences between the two ecotypes revealed the variable responses of the plant under the applied treatments. Fluctuations were observed at the level of TCA cycle intermediates (fumarate, malate, and succinate) of the montane ecotype, while the seaside ecotype was not affected. In addition, the results showed that proline (Pro) levels increased in both ecotypes grown under a low N-supply and high salt stress, while other osmoprotectant metabolites such as γ-aminobutyric acid (GABA) exhibited variable responses under the different N supply levels. Fatty acids such as α-linolenate and linoleate also displayed variable fluctuations following plant treatments. The carbohydrate content of the plants, as indicated by the levels of glucose, fructose, α,α-trehalose, and myo-inositol, was significantly affected by the applied treatments. These findings suggest that the different adaptation mechanisms among the two contrasting ecotypes could be strongly correlated with the observed changes in their primary metabolism. This study also suggests that the seaside ecotype may have developed unique adaptation mechanisms to cope with high N supply and salinity stress, making it a promising candidate for future breeding programs aimed at developing stress tolerant varieties of C. spinosum L.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Asteraceae / Nitrogênio Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Asteraceae / Nitrogênio Idioma: En Ano de publicação: 2023 Tipo de documento: Article