Effect of nitrogen and phosphorus on alleviation of boron toxicity in Puccinellia tenuiflora under the combined stresses of salt and drought |
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Authors: | Meinan Zhen Mengying Cui Jingye Xia Chengcang Ma |
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Institution: | 1. Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, China;2. Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, China |
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Abstract: | AbstractHigh boron (B) often occurs in saline and arid soils and exerts toxicity to plants. A potting experiment was conducted to examine the effects of nitrogen (N) and phosphorus (P) on alleviating B toxicity in an alkali grass, Puccinellia tenuiflora, in saline and arid soils. As a B-tolerant species, P. tenuiflora grew well in soil with high concentration (300?mg kg?1) of B under the combined stresses of salt and drought. N and P have significantly increased plant biomass and decreased B concentrations in plants by 14.5%–31.4% in the shoot and 22.3%–41.5% in the root, respectively. The results indicate that the addition of fertilizer enforced photosynthesis of plant and decreased K+/Na+ ratio. Our results suggest that N and P can be used to alleviate B toxicity in P. tenuiflora under the combined stresses of salt and drought. |
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Keywords: | Boron toxicity drought nitrogen phosphorus salt |
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