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A Transporter Regulating Silicon Distribution in Rice Shoots
Open accessAbstract
Rice (Oryza sativa) accumulates very high concentrations of silicon (Si) in the shoots, and the deposition of Si as amorphous silica helps plants to overcome biotic and abiotic stresses. Here, we describe a transporter, Lsi6, which is involved in the distribution of Si in the shoots. Lsi6 belongs to the nodulin-26 intrinsic protein III subgroup of aquaporins and is permeable to silicic acid. Lsi6 is expressed in the leaf sheath and leaf blades as well as in the root tips. Cellular localization studies revealed that Lsi6 is found in the xylem parenchyma cells of the leaf sheath and leaf blades. Moreover, Lsi6 showed polar localization at the side facing toward the vessel. Knockdown of Lsi6 did not affect the uptake of Si by the roots but resulted in disordered deposition of silica in the shoots and increased excretion of Si in the guttation fluid. These results indicate that Lsi6 is a transporter responsible for the transport of Si out of the xylem and subsequently affects the distribution of Si in the leaf.
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Citations
Cited by
Nramp5 Is a Major Transporter Responsible for Manganese and Cadmium Uptake in Rice
Sasaki, A., Yamaji, N., Yokosho, K., & Ma, J. F. (2012) · The Plant Cell · doi:10.1105/tpc.112.096925 · Cited by 1,307
Self-citationZhao, F.-J., McGrath, S. P., & Meharg, A. A. (2010) · Annual Review of Plant Biology · doi:10.1146/annurev-arplant-042809-112152 · Cited by 1,246
Mechanisms of silicon-mediated alleviation of heavy metal toxicity in plants: A review
Adrees, M., Ali, S., Rizwan, M., Zia-ur-Rehman, M., Ibrahim, M., Abbas, F., Farid, M., Qayyum, M. F., & Irshad, M. K. (2015) · Ecotoxicology and Environmental Safety · doi:10.1016/j.ecoenv.2015.05.011 · Cited by 828
Silicon: its manifold roles in plants.
Epstein, E. (2009) · Annals of Applied Biology · doi:10.1111/j.1744-7348.2009.00343.x · Cited by 680
Carroll, A., & Somerville, C. (2009) · Annual Review of Plant Biology · doi:10.1146/annurev.arplant.043008.092125 · Cited by 676
Metadata
- Authors
- Yamaji, N., Mitatni, N., & Ma, J. F.
- Venue
- The Plant Cell
- Publisher
- Oxford University Press (OUP)
- Published
- 2008-05-01
- Volume
- 20
- Issue
- 5
- Pages
- 1381-1389
- ISSN
- 1040-4651 (ISSN-L)
- 1532-298X
- OpenAlex
- W2155935848
- Cited by
- 418
- References
- 0
- FWCI
- 18.90
- Type
- journal article
- Language
- en
- Open access
- bronze
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