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Tomato Phosphate Transporter Genes Are Differentially Regulated in Plant Tissues by Phosphorus1
Open accessAbstract
Phosphorus is a major nutrient acquired by roots via high-affinity inorganic phosphate (Pi) transporters. In this paper, we describe the tissue-specific regulation of tomato (Lycopersicon esculentum L.) Pi-transporter genes by Pi. The encoded peptides of the LePT1 and LePT2genes belong to a family of 12 membrane-spanning domain proteins and show a high degree of sequence identity to known high-affinity Pi transporters. Both genes are highly expressed in roots, although there is some expression of LePT1 in leaves. Their expression is markedly induced by Pi starvation but not by starvation of nitrogen, potassium, or iron. The transcripts are primarily localized in root epidermis under Pi starvation. Accumulation of LePT1 message was also observed in palisade parenchyma cells of Pi-starved leaves. Our data suggest that the epidermally localized Pi transporters may play a significant role in acquiring the nutrient under natural conditions. Divided root-system studies support the hypothesis that signal(s) for the Pi-starvation response may arise internally because of the changes in cellular concentration of phosphorus.
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Citations
Cited by
Raghothama, K. G., & Karthikeyan, A. S. (2005) · Plant and Soil · doi:10.1007/s11104-004-2005-6 · Cited by 1,640
Self-citationPii, Y., Mimmo, T., Tomasi, N., Terzano, R., Cesco, S., & Crecchio, C. (2015) · Biology and Fertility of Soils · doi:10.1007/s00374-015-0996-1 · Cited by 904
Signaling Network in Sensing Phosphate Availability in Plants
Chiou, T.-J., & Lin, S.-I. (2011) · Annual Review of Plant Biology · doi:10.1146/annurev-arplant-042110-103849 · Cited by 767
Functional biology of plant phosphate uptake at root and mycorrhiza interfaces
Bucher, M. (2007) · New Phytologist · doi:10.1111/j.1469-8137.2006.01935.x · Cited by 718
The Arabidopsis SUMO E3 ligase SIZ1 controls phosphate deficiency responses
Miura, K., Rus, A., Sharkhuu, A., Yokoi, S., Karthikeyan, A. S., Raghothama, K. G., Baek, D., Koo, Y. D., Jin, J. B., Bressan, R. A., et al. (2005) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0500778102 · Cited by 599
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Metadata
- Authors
- Liu, C., Muchhal, U. S., Uthappa, M., Kononowicz, A. K., & Raghothama, K. G.
- Venue
- Plant Physiology
- Publisher
- Oxford University Press (OUP)
- Published
- 1998-01-01
- Volume
- 116
- Issue
- 1
- Pages
- 91-99
- ISSN
- 0032-0889 (ISSN-L)
- 1532-2548
- OpenAlex
- W2026823219
- Cited by
- 335
- References
- 0
- FWCI
- 25.96
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Liu, C., Muchhal, U. S., Uthappa, M., Kononowicz, A. K., & Raghothama, K. G. (1998). Tomato Phosphate Transporter Genes Are Differentially Regulated in Plant Tissues by Phosphorus1. Plant Physiology. https://doi.org/10.1104/pp.116.1.91
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