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- Title
Loss of an MDR transporter in compact stalks of maize br2 and sorghum dw3 mutants.
- Authors
Multani, Dilbag S; Briggs, Steven P; Chamberlin, Mark A; Blakeslee, Joshua J; Murphy, Angus S; Johal, Gurmukh S
- Abstract
Agriculturally advantageous reduction in plant height is usually achieved by blocking the action or production of gibberellins. Here, we describe a different dwarfing mechanism found in maize brachytic2 (br2) mutants characterized by compact lower stalk internodes. The height reduction in these plants results from the loss of a P-glycoprotein that modulates polar auxin transport in the maize stalk. The sorghum ortholog of br2 is dwarf3 (dw3), an unstable mutant of long-standing commercial interest and concern. A direct duplication within the dw3 gene is responsible for its mutant nature and also for its instability, because it facilitates unequal crossing-over at the locus.
- Publication
Science (New York, N.Y.), 2003, Vol 302, Issue 5642, p81
- ISSN
1095-9203
- Publication type
Journal Article
- DOI
10.1126/science.1086072