Signaling pathways regulated by heterotrimeric G proteins are well known to be essential in eukaryotic organisms. In the last decade, it has been shown that plants also have genes for the canonical subunits of heterotrimeric G proteins. The genomes of rice and Arabidopsis thaliana have only a single copy gene for each of the α, β and γ1 subunits. This situation is in contrast to mammalian genomes that contain multiple genes for each of the 23 α, 6 β and 12 γ subunits. This is a striking characteristic of higher plant heterotrimeric G proteins. In this chapter, we will summarize the subunits of rice heterotrimeric G proteins and discuss the possible functions of the G proteins in rice and Arabidopsis.
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Iwasaki, Y., Kato, H., Fujisawa, Y., Oki, K. (2008). Rice Heterotrimeric G Protein Signaling. In: Hirano, HY., Sano, Y., Hirai, A., Sasaki, T. (eds) Rice Biology in the Genomics Era. Biotechnology in Agriculture and Forestry, vol 62. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74250-0_11
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