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G Protein Signaling in the Regulation of Arabidopsis Seed Germination

Science's STKE  01 Nov 2005:
Vol. 2005, Issue 308, pp. cm11
DOI: 10.1126/stke.3082005cm11

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Seed germination and early seedling growth are regulated by an intricate network of hormonal signaling pathways. The plant hormones gibberellic acid (GA) and brassinosteroids (BRs) are important positive regulators of these processes, whereas the hormone abscisic acid (ABA) is a potent negative regulator. In Arabidopsis, analysis of mutant plants has implicated heterotrimeric guanine nucleotide-binding protein (G protein) components in regulation of seed germination by all three of these hormones.

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