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Sci. STKE, 15 November 2005
Vol. 2005, Issue 310, p. cm12
[DOI: 10.1126/stke.3102005cm12]


G Protein Signaling in the Regulation of Rice Seed Germination

Sarah M. Assmann*

Biology Department, Penn State University, 208 Mueller Laboratory, University Park, PA 16802, USA.


Abstract: Seed germination and early seedling growth are regulated by an intricate network of hormonal signaling pathways. The plant hormones gibberellic acid (GA) and abscisic acid (ABA) are particularly important positive and negative regulators of these processes, respectively. In the cereal rice, mutant analysis has implicated heterotrimeric guanine nucleotide–binding protein (G protein) signaling in GA-stimulated expression of several genes, including expression of the gene encoding the hydrolytic enzyme α-amylase, which breaks down carbohydrate reserves and thus mobilizes nutrients that nourish the young seedling.

*Corresponding author. E-mail, sma3{at}

Citation: S. M. Assmann, G Protein Signaling in the Regulation of Rice Seed Germination. Sci. STKE 2005, cm12 (2005).

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Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882