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The A and B loci in tobacco regulate a network of stress response genes, few of which are associated with nicotine biosynthesis.

Plant molecular biology - 1 Mar 2006

Kidd Sarah K, Melillo Amanda A, Lu Rong-He, Reed Deborah G, Kuno Norihito, Uchida Kenko, Furuya Masaki, Jelesko John G

Abstract excerpt

Nicotine biosynthesis in Nicotiana tabacum is under genetic control by the A and B loci. Plants containing semi-dominant mutations at both the A and B loci (i.e. aabb genotype) have lower nicotine levels, reduced nicotine biosynthetic enzyme activities, and reduced mRNA levels of the corresponding biosynthetic genes. The A and B loci therefore appear to be coordinate regulators of several nicotine biosynthetic...

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PMID: 16649107
DOI: 10.1007/s11103-005-5546-z

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

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