Submitted to: Plant And Cell Physiology
Publication Type: Abstract Only
Publication Acceptance Date: 3/14/2005
Publication Date: N/A
Citation: N/A Interpretive Summary:
Technical Abstract: To adapt to low soil fertility, white lupin (Lupinus albus L.) produces cluster roots that are characterized by the synchronous and determinate development of rootlets that arise from pericycle and the secretion of organic acid and acid phosphatase. To understand the molecular mechanisms controlling cluster root development, one lupin MYB gene, named LaMYB1, was isolated from the cluster root-derived cDNA library. LaMYB1 showed no homology with well-characterized R2R3-MYB genes, indicating that LaMYB1 is a novel R2R3-MYB gene. LaMYB1 expressed mainly in roots and faintly in nodules, leaves, flowers, and shoot apical meristems. White lupin hairy roots transformed with the LaMYB1 promoter::GUS construct showed that the transcription of this gene was specific to pericycle.