Nitrate partial replacement by chloride to improve growth and water status in tomato plants
| Autor: | Santos-Torres, Irene, Lucas Gutiérrez, Marta, García Rodríguez, Álvaro F., Díaz-Espejo, Antonio, Colmenero Flores, José M., Rosales Villegas, Miguel Á. |
|---|---|
| Přispěvatelé: | Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Consejo Superior de Investigaciones Científicas (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | 2 páginas.- 2 referencias.- Poster presentado en el BP2021: XXIV Reunión de la Sociedad Española de Biología de Plantas y XVII Congreso Hispano-Luso de Biología de Plantas, 7 y 8 de julio de 2021. online Chloride (Clֿ ) is an essential micronutrient that has traditionally been considered a harmful element for plants due to its toxicity and antagonism with nitrate (NOֿ3 ), which represents the major nitrogen source for crops. However, Clֿ application al macronutrient levels exhibits positive effects for plant growth, as a result of improved photosynthetic performance, whole-plant water relations, and water use efficiency l. Furthermore, el nutrition has been shown to improve nitrogen-use efficiency, reducing nitrate accumulation in leaves and, as a result, improving the nutritional quality of agricultural products for human consumption. The agricultural use of NO3̄ in organic and chemical fertilizers is currently a major environmental concern in Europe since excessive NO3̄ concentrations cause water pollution being harmful to people and nature. Therefore, Clֿ arises as a potential strategy to reduce NO3̄ over-fertilization in agriculture by the implementation of new Clֿ / NO3̄ ratios in fertilizers. With this aim, in this work we evaluated whether el- nutrition improves growth and different physiological traits in Tomato plants subjected to increasing NO)' treatments. Tomato plants were grown in semi-hydroponics under greenhouse conditions, and watered with increasing NO3̄ treatments (3-15 mM). In addition, plants from each NO3̄ treatment were subjected to two nutritional treatments: 5 mM Cl--based treatment (CL) and a sulphate+phosphate treatment (SP) as a control, all treatments containing a similar cationic balance. After 30 DAS, tomato plants were harvested and different growth and physiological parameters were analyzed, Our results showed that increasing NO3̄ concentrations induced total, leaf and root growth, remaining with no changes beyond 9 mM NO3̄ . Clֿ -treated plants exhibited stronger growth stimulation in a NO3̄ treatments compared lo SP plants, whereas NO3̄ content was highly reduced. Interestingly, under low NO3̄ (3 mM), el showed similar values of growth, SPAD and water potential to 9 mM NO3̄ without el-, whereas Photosynthesis remained unchanged. In conclusion, our results demonstrated a beneficial effect of Cl' nutrition on tomato plant growth and water status, and more specifically when partially replacing NO3̄ by Clֿ , revealing optimal Clֿ / NO3̄ ratios with high potential to reduce NO3̄ ' fertilization, which could lead to a healthier and sustainable agriculture Funding for the present research was provided by Ihe Spanish Ministry of Science Innovation and Universities-FEDER grant RTl2018-094460-B-IOO, Spanish National Research Council granl CSIC-202040E266, and European Union's Horizon 2020 research and innovation prograrnme lInder Ihe Marie Sklodowska-Curie granl agreemenl No 895613 . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|