Effects of lanthanum and acid rain stress on the bio-sequestration of lanthanum in phytoliths in germinated rice seeds
Open Access
- 15 May 2018
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 13 (5), e0197365
- https://doi.org/10.1371/journal.pone.0197365
Abstract
REEs in the environment can be absorbed by plants and sequestered by plant phytoliths. Acid rain can directly or indirectly affect plant physiological functions. Currently, the effects of REEs and acid rain on phytolith-REEs complex in plants are not yet fully understood. In this study, a high-silicon accumulation crop, rice (Oryza sativa L.), was selected as a representative of plants, and orthogonal experiments were conducted under various levels of lanthanum [La(III)] and pH. The results showed that various La(III) concentrations could significantly improve the efficiency and sequestration of phytolith La(III) in germinated rice seeds. A pH of 4.5 promoted phytolith La(III) sequestration, while a pH of 3.5 inhibited sequestration. Compared with the single treatment with La(III), the combination of La(III) and acid rain inhibited the efficiency and sequestration of phytolith La(III). Correlation analysis showed that the efficiency of phytolith La(III) sequestration had no correlation with the production of phytolith but was closely correlated with the sequestration of phytolith La(III) and the physiological changes of germinated rice seeds. Phytolith morphology was an important factor affecting phytolith La(III) sequestration in germinated rice seeds, and the effect of tubes on sequestration was more significant than that of dumbbells. This study demonstrated that the formation of the phytolith and La(III) complex could be affected by exogenous La(III) and acid rain in germinated rice seeds.Keywords
Funding Information
- Research and Innovation Project for Postgraduates of Higher Education Institutions of Jiangsu Province (KYLX15_1164)
- National Natural Science Foundation of China (31170477)
- National Natural Science Foundation of China (21371100)
- National Natural Science Foundation of China (21501068)
This publication has 81 references indexed in Scilit:
- Seed Germination and VigorAnnual Review of Plant Biology, 2012
- Emerging understanding of the ecosystem silica filterBiogeochemistry, 2011
- Biogeochemical effects of forest vegetation on acid precipitation-related water chemistry: A case study in southwest ChinaJournal of Environmental Monitoring, 2010
- Phytoliths Analysis for the Discrimination of Foxtail Millet (Setaria italica) and Common Millet (Panicum miliaceum)PLOS ONE, 2009
- Regional trends in soil acidification and exchangeable metal concentrations in relation to acid deposition ratesEnvironmental Pollution, 2009
- Germination Responses to Water Potential in Neotropical Pioneers Suggest Large-seeded Species Take More RisksAnnals of Botany, 2008
- Molecular networks regulating Arabidopsis seed maturation, after‐ripening, dormancy and germinationNew Phytologist, 2008
- An efflux transporter of silicon in riceNature, 2007
- Biologic cycling of silica across a grassland bioclimosequenceGlobal Biogeochemical Cycles, 2006
- Seed dormancy and the control of germinationNew Phytologist, 2006