Arsenic-hyperaccumulator Pteris vittata efficiently solubilized phosphate rock to sustain plant growth and As uptake
| Autor: | Yong-He Han, Jing-Wei Fu, Hanyi Mei, Yue Cao, Yanshan Chen, Lena Q. Ma, Letuzia M. de Oliveira, Yungen Liu, Bala Rathinasabapathi, Xue Liu |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Environmental Engineering Phytic Acid Plant Exudates Health Toxicology and Mutagenesis 010501 environmental sciences Biology Plant Roots 01 natural sciences Arsenic Phosphates chemistry.chemical_compound Botany Environmental Chemistry Hyperaccumulator Food science Pteris Waste Management and Disposal 0105 earth and related environmental sciences chemistry.chemical_classification Phytic acid Arsenate food and beverages biology.organism_classification Phosphate Pollution chemistry Pteris vittata 010606 plant biology & botany Organic acid Pteris ensiformis |
| Zdroj: | Journal of Hazardous Materials. 330:68-75 |
| ISSN: | 0304-3894 |
| Popis: | Phosphorus (P) is one of the most important nutrients for phytoremediation of arsenic (As)-contaminated soils. In this study, we demonstrated that As-hyperaccumulator Pteris vittata was efficient in acquiring P from insoluble phosphate rock (PR). When supplemented with PR as the sole P source in hydroponic systems, P. vittata accumulated 49% and 28% higher P in the roots and fronds than the -P treatment. In contrast, non-hyperaccumulator Pteris ensiformis was unable to solubilize P from PR. To gain insights into PR solubilization by plants, organic acids in plant root exudates were analyzed by HPLC. The results showed that phytic acid was the predominant (>90%) organic acid in P. vittata root exudates whereas only oxalic acid was detected in P. ensiformis. Moreover, P. vittata secreted more phytic acid in -P and PR treatments. Compared to oxalic acid, phytic acid was more effective in solubilizing PR, suggesting that phytic acid was critical for PR utilization. Besides, secretion of phytic acid by P. vittata was not inhibited by arsenate. Our data indicated that phytic acid played an important role in efficient use of insoluble PR by P. vittata, shedding light on using insoluble PR to enhance phytoremediation of As-contaminated soils. |
| Databáze: | OpenAIRE |
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