Abstract
We investigated effects of phosphorus (P) and iron (Fe) on root elongation (RE) of lettuce in arsenic (As)-spiked soils using response surface methodology (RSM). To stabilize interactions between As and Fe in a soil preparation, the sequential incorporation method using Fe and P (SIMFe-P) was applied. From a phytotoxicity assay, As in roots (Asroot) was negatively associated with RE, Fe in soils, and P in roots and soils. The P in roots was also positively related to RE. In a model study, As and interaction factor between P and Fe showed negative coefficients but others showed positive ones. From a confirmation study, RE on exposure to As was verified to be much greater in soils treated by SIMFe-P than in soils separately treated with both elements. These results indicated that application of SIMFe-P to As-contaminated soils might be expected to have an advantage during the early stage of plant root growth.
Original language | English |
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Pages (from-to) | 1259-1271 |
Number of pages | 13 |
Journal | Communications in Soil Science and Plant Analysis |
Volume | 44 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2013 Apr |
Bibliographical note
Funding Information:This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2012R1A1A2006451).
Keywords
- Arsenic
- iron
- lettuce
- phosphorus
- response surface model
- root elongation
ASJC Scopus subject areas
- Agronomy and Crop Science
- Soil Science