Biochar enhances the cadmium tolerance in spinach (Spinacia oleracea) through modification of Cd uptake and physiological and biochemical attributes
| Autor: | Muhammad Farooq Qayyum, Uzma Younis, M. H. R. Shah, Rabia Abdur Rehman, Yong Sik Ok, Saeed Ahmad Malik, Muhammad Rizwan, Niaz Ahmad |
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| Rok vydání: | 2016 |
| Předmět: |
Spinacia
Health Toxicology and Mutagenesis 0211 other engineering and technologies chemistry.chemical_element Metal toxicity 02 engineering and technology 010501 environmental sciences 01 natural sciences Soil Spinacia oleracea Botany Biochar Environmental Chemistry Soil Pollutants Food science Photosynthesis 0105 earth and related environmental sciences 021110 strategic defence & security studies Cadmium biology food and beverages Plant physiology Agriculture Phosphorus General Medicine Ascorbic acid biology.organism_classification Pollution chemistry Charcoal Spinach Phytotoxicity |
| Zdroj: | Environmental science and pollution research international. 23(21) |
| ISSN: | 1614-7499 |
| Popis: | Cadmium (Cd) has no known role in plant biology and is toxic to plants and animals. The Cd mainly accumulated in agricultural soils through anthropogenic activities, such as sewage water irrigation and phosphorus fertilization. Biochar (BC) has been proposed as an amendment to reduce metal toxicity in plants. The objective of this study was to evaluate the role of BC (cotton stick at a rate of 0, 3, and 5 %) on Cd uptake and the photosynthetic, physiological, and biochemical responses of spinach (Spinacia oleracea) grown in Cd-spiked soil (0, 25, 50, 75, and 100 mg Cd kg-1 soil). The results showed that Cd toxicity decreased growth, photosynthetic pigments, gas exchange characteristics, and amino acid and protein contents in 52-day-old spinach seedlings. The Cd treatments increased the concentrations of Cd, sugar, ascorbic acid, and malondialdehyde (MDA) in plants. The application of BC ameliorated the harmful effects of Cd in spinach plants. Under Cd stress, BC application increased the growth, photosynthesis, and protein contents and decreased Cd concentrations and MDA contents in plants. The maximum BC-mediated increase in dry biomass was about 25 % with 5 % BC application in control plants. It is concluded that BC could ameliorate Cd toxic effects in spinach through changing the physiological and biochemical attributes under Cd stress. |
| Databáze: | OpenAIRE |
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