Combined effects of salinity and phosphorus availability on growth, gas exchange, and nutrient status of Catapodium rigidum
| Autor: | Najla Trabelsi, Abderrazak Smaoui, Chedly Abdelly, Ons Talbi Zribi, Abdelwahed Hamdi, Inès Slama |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Plant growth Chemistry Soil Science Catapodium rigidum 04 agricultural and veterinary sciences Photosynthesis 01 natural sciences Salinity Nutrient Animal science Fodder Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Phosphorus deficiency 010606 plant biology & botany |
| Zdroj: | Arid Land Research and Management. 32:277-290 |
| ISSN: | 1532-4990 1532-4982 |
| DOI: | 10.1080/15324982.2018.1427640 |
| Popis: | The combined effects of NaCl-salinity and phosphorus deficiency on biomass production, nutritional status, and photosynthetic activity were studied in Catapodium rigidum: an annual Poacea with fodder potential. Plants were grown in hydroponic conditions for 55 days under two phosphorus (P) supply: 5 (low) or 180 µmol KH2PO4 (sufficient), in the absence or presence of 100 mM NaCl. Obtained results demonstrated that both salinity and P deficiency treatments applied separately reduced substantially plant growth and CO2 assimilation rate with a more marked impact of salt stress. Salinity has no substantial effect on both shoot P concentrations and phosphorus acquisition efficiency independently of P availability. The highest decrease in plant growth (−91%) was observed in plants simultaneously submitted to both stresses suggesting an additive effect of the two stresses and that P deficiency increased the susceptibility of C. rigidum to salinity. This may be linked to a significant decrease in potassiu... |
| Databáze: | OpenAIRE |
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