Supplementary potassium and calcium improves salt tolerance in olive plants
| Autor: | Badii Gaaliche, Haifa Kchaou, Ajmi Larbi, Hakim Boulal, Kamel Gargouri, Fermín Morales |
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| Přispěvatelé: | International Plant Nutrition Institute, Morales Iribas, Fermín, Morales Iribas, Fermín [0000-0003-1834-4322] |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Salinity Soil salinity Potassium Sodium Population chemistry.chemical_element Horticulture Calcium 01 natural sciences 03 medical and health sciences Nutrient education Olea europaea education.field_of_study Chemistry Crop yield food and beverages 030104 developmental biology Na exclusion mechanism 010606 plant biology & botany |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | 10 Pags.- 3 Tabls.- 8 Figs. Soil salinization increase, aggravated by the foreseen low precipitation related to climate change, is a worldwide problem causing crop yield reductions, affecting population and environmental issues due to the salt-containing low-quality water. Enhancing the salt tolerance of plants, especially crops, is an interesting and effective solution to minimize salt-related crop problems. Toward this goal, we evaluated in this study the effect of potassium (K) and calcium (Ca) application on plant growth, nutrient uptake, water status and electrolyte and potassium leakage of two-year-old potted olive plants grown under saline conditions (100 and 200 mM NaCl). Results showed that all measured parameters were affected by salinity. However, the application of K and Ca enhanced the growth parameters, improved the water status and reduced the electrolyte and K leakage, the latter reflecting a positive effect in membrane integrity. The nutritional balance was moderately improved in salt-stressed plants treated with K and Ca. The significant reduction in sodium (Na) concentration in both leaves and roots, and the enhancement of K and Ca concentration in the different plant tissues indicated that the K and Ca supply raised the Na exclusion mechanism. The largest positive effect of K was observed with 40 mM KNO3 dose at both salinity levels. Furthermore, the beneficial effect of Ca was achieved with 40 and 10 mM CaCl2 in plants grown at 100 and 200 mM NaCl, respectively. Thus, for this relatively salt-tolerant and economically important crop, K and Ca are recommended to supply in order to mitigate the harmful effects of salinity and to develop saline agriculture in, for instance, coastal saline land. This work was supported by grants from Tunisian LPOI (LR16 IO 03-SERS-Tunisia) and International Plant Nutrition Institute (IPNI). |
| Databáze: | OpenAIRE |
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