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SGR2, a Phospholipase-Like Protein, and ZIG/SGR4, a SNARE, Are Involved in the Shoot Gravitropism of Arabidopsis
Open accessAbstract
In higher plants, the shoot and the root generally show negative and positive gravitropism, respectively. To elucidate the molecular mechanisms involved in gravitropism, we have isolated many shoot gravitropism mutants in Arabidopsis. The sgr2 and zig/sgr4 mutants exhibited abnormal gravitropism in both inflorescence stems and hypocotyls. These genes probably are involved in the early step(s) of the gravitropic response. The sgr2 mutants also had misshapen seed and seedlings, whereas the stem of the zig/sgr4 mutants elongated in a zigzag fashion. The SGR2 gene encodes a novel protein that may be part of a gene family represented by bovine phosphatidic acid-preferring phospholipase A1 containing a putative transmembrane domain. This gene family has been reported only in eukaryotes. The ZIG gene was found to encode AtVTI11, a protein that is homologous with yeast VTI1 and is involved in vesicle transport. Our observations suggest that the two genes may be involved in a vacuolar membrane system that affects shoot gravitropism.
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Cited by
Auxin transport — shaping the plant
Friml, J. (2003) · Current Opinion in Plant Biology · doi:10.1016/s1369526602000031 · Cited by 745
Phospholipid-Based Signaling in Plants
Meijer, H. J. G., & Munnik, T. (2003) · Annual Review of Plant Biology · doi:10.1146/annurev.arplant.54.031902.134748 · Cited by 587
Uemura, T., Ueda, T., Ohniwa, R. L., Nakano, A., Takeyasu, K., & Sato, M. H. (2004) · Cell Structure and Function · doi:10.1247/csf.29.49 · Cited by 532
Plant Gravitropism. Unraveling the Ups and Downs of a Complex Process
Blancaflor, E. B., & Masson, P. H. (2003) · Plant Physiology · doi:10.1104/pp.103.032169 · Cited by 332
Morita, M. T., & Tasaka, M. (2004) · Current Opinion in Plant Biology · doi:10.1016/j.pbi.2004.09.001 · Cited by 286
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Metadata
- Authors
- Kato, T., Morita, M. T., Fukaki, H., Yamauchi, Y., Uehara, M., Niihama, M., & Tasaka, M.
- Venue
- The Plant Cell
- Publisher
- Oxford University Press (OUP)
- Published
- 2002-01
- Volume
- 14
- Issue
- 1
- Pages
- 33-46
- ISSN
- 1040-4651 (ISSN-L)
- 1532-298X
- OpenAlex
- W2170072969
- Cited by
- 235
- References
- 5
- FWCI
- 16.36
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Kato, T., Morita, M. T., Fukaki, H., Yamauchi, Y., Uehara, M., Niihama, M., & Tasaka, M. (2002). SGR2, a Phospholipase-Like Protein, and ZIG/SGR4, a SNARE, Are Involved in the Shoot Gravitropism of Arabidopsis. The Plant Cell. https://doi.org/10.1105/tpc.010215
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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