Paul B. Larsen

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Aluminum (Al) toxicity is a global problem severely limiting agricultural productivity in acid-soil regions comprising upwards of 50% of the world's arable land [1, 2]. Although Al-exclusion mechanisms have been intensively studied [3-9], little is known about tolerance to internalized Al, which is predicted to be mechanistically complex because of the(More)
As part of a continuing effort to elucidate mechanisms that regulate the magnitude of ethylene signalling, an Arabidopsis mutant with an enhanced ethylene response was identified. Subsequent characterization of this loss-of-function mutant revealed severe hypocotyl shortening in the presence of saturating ethylene along with increased expression in leaves(More)
Aluminium (Al) toxicity is a global agricultural problem that occurs in acid soil environments and severely limits root growth and crop productivity. The isolation and characterization of a gene, ALS3, which is absolutely required by Arabidopsis seedlings for growth in an Al-toxic environment was reported previously. Since the als3-1 loss-of-function mutant(More)
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