Strategies of Na and Cl accumulation in Solanum lycopersicum and its wild halophyte relative Solanum chilense under salt stress : focus on Na in the inflorescences
(2022) Eucarpia tomato 2022 — Location: Valencia, Spain (31.May.2022)
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- Salinity is a growing global concern that affects the yield of crop species, including tomato (Solanum lycopersicum). In contrast to S. lycopersicum, its wild relative Solanum chilense was reported to have halophyte properties. We compared salt resistance of both species during vegetative and reproductive phases and investigated Na and Cl accumulation in the different organs. Plants were exposed to NaCl (0, 60, 120 mM) from the seedling stage up to flowering (85 days after stress). Overall, S. chilense accumulated more Na than S. lycopersicum while Cl concentration was similar in both species under salt stress. Sodium accumulated mainly in roots in S. lycopersicum and in stems in S. chilense, showing that S. lycopersicum had an excluder behavior and S. chilense an includer behavior regarding Na accumulation while such a difference was not observed regarding Cl accumulation. Both species limited the accumulation of Na and Cl in the inflorescences. The concentration of Na and Cl in the inflorescences were respectively lower and higher in S. lycopersicum compared to S. chilense under salt stress. Na localization in the flowers was analyzed by laser ablation ICP-MS. Na was mainly located in male floral organs of S. chilense but in non-reproductive floral organs of S. lycopersicum under salinity. Na and Cl accumulation and repartition could be partly explained by gene expression of transporters involved in Na and Cl distribution. Overall, our results indicated that S. chilense was more salt-resistant than S. lycopersicum and that both species differed towards strategies of Na and Cl accumulation.
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Bigot, S., Juan-Pablo Martinez, Quinet, M., & Lutts, S. (2022). Strategies of Na and Cl accumulation in Solanum lycopersicum and its wild halophyte relative Solanum chilense under salt stress : focus on Na in the inflorescences. Eucarpia tomato 2022, Valencia, Spain. https://hdl.handle.net/2078.5/247395