Combined effect of Cr-toxicity and temperature rise on physiological and biochemical responses of Atriplex halimus L
| Autor: | José M. Barcia-Piedras, Brahim Lotmani, Enrique Mateos-Naranjo, Jesús Alberto Pérez-Romero, Mohammed Mesnoua, Susana Redondo-Gómez |
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| Rok vydání: | 2018 |
| Předmět: |
Chromium
0106 biological sciences Stomatal conductance Physiology Plant Science 010501 environmental sciences Photosynthesis Plant Roots 01 natural sciences Antioxidants Nutrient Atriplex halimus Relative growth rate Genetics 0105 earth and related environmental sciences Minerals Plant Stems biology Chemistry Temperature Water biology.organism_classification Adaptation Physiological Plant Leaves Phytoremediation Horticulture Shoot Toxicity Atriplex Gases 010606 plant biology & botany |
| Zdroj: | Plant Physiology and Biochemistry. 132:675-682 |
| ISSN: | 0981-9428 |
| DOI: | 10.1016/j.plaphy.2018.08.025 |
| Popis: | An experiment was conducted to evaluate the combined effect of temperature (26 and 30 °C) and Cr toxicity (0, 100 and 1000 μM Cr) on growth, photosynthesis, water content, Cr and nutrients uptake and translocation. The role of antioxidative enzyme towards stresses tolerance was also investigated. Results showed that the maximum relative growth rate and leaf area per plant of Atriplex halimus L. were recorded at 100 μM Cr and 26 °C. However, presence of Cr reduced net photosynthetic and stomatal conductance rates. Overall, temperature rise enhanced the toxic effect of Cr by reducing growth and photosynthesis and inducing antioxidant enzymes activities. Furthermore, temperature rise increased nutrient uptake, as well as nutrient translocation to aboveground tissues; while it diminished Cr translocation. Finally, roots were the main sink for Cr accumulation in A. halimus. At 1000 μM Cr, root Cr concentrations reached 7.2 and 9.1 mg g−1 at 26 and 30 °C, respectively; while shoot Cr concentrations were 0.45 and 0.44 mg g−1 (26 and 30 °C, respectively). The high Cr-accumulation in roots suggests that A. halimus presents a great potential for phytoremediation, especially phytostabilisation of Cr contaminated soils. |
| Databáze: | OpenAIRE |
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