Lateral root development
One of the plant processes regulated by auxin is lateral root development, which has been extensively reviewed elsewhere and will not be discussed here in detail. Briefly, upon germination, young seedlings contain only primary roots formed directly from the radicle present in the embryo. Lateral root primordia originate from pericycle cells located in front of the xylem of primary roots. Additional lateral roots reiteratively generated during root growth play essential roles in the water and nutrient uptake required to sustain proper plant growth and development. Auxin biosynthesis, signalling and transport are required for lateral root formation since auxin mutants show reduced or defective lateral root production, and exogenous treatment of pericycle cells with auxin promotes lateral root formation. Over recent years, research into lateral root development has introduced a new paradigm whereby the role of auxin as a key regulator of plant root architecture in response to environmental stimuli has been studied (Malamy, 2005). In this review I will briefly highlight some of the recent studies in this exciting research area.
Lateral root development
One of the plant processes regulated by auxin is lateral root development, which has been extensively reviewed elsewhere and will not be discussed here in detail. Briefly, upon germination, young seedlings contain only primary roots formed directly from the radicle present in the embryo. Lateral root primordia originate from pericycle cells located in front of the xylem of primary roots. Additional lateral roots reiteratively generated during root growth play essential roles in the water and nutrient uptake required to sustain proper plant growth and development. Auxin biosynthesis, signalling and transport are required for lateral root formation since auxin mutants show reduced or defective lateral root production, and exogenous treatment of pericycle cells with auxin promotes lateral root formation. Over recent years, research into lateral root development has introduced a new paradigm whereby the role of auxin as a key regulator of plant root architecture in response to environmental stimuli has been studied (Malamy, 2005). In this review I will briefly highlight some of the recent studies in this exciting research area.
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