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Temperature Compensation Of Auxin Dependent Developmental Patterning, Nicholas J. Kaplinsky
Temperature Compensation Of Auxin Dependent Developmental Patterning, Nicholas J. Kaplinsky
Biology Faculty Works
The establishment of localized auxin gradients plays a central role in developmental patterning in plants. Auxin levels and responses have been shown to increase with temperature although developmental patterning is not affected. This suggests the existence of a homeostatic mechanism that ensures that patterning occurs normally over a range of temperatures. We recently described the cloning and characterization of BOBBER1 (BOB1), an Arabidopsis gene which encodes a small heat shock protein. BOB1 is required for the establishment of auxin gradients and for normal developmental patterning. BOB1 is also required for organismal thermotolerance and localizes to heat shock granules at elevated …
Bobber1 Is A Noncanonical Arabidopsis Small Heat Shock Protein Required For Both Development And Thermotolerance, Dahlia Erin Perez , '08, J. S. Hoyer, Ayanna Iman Johnson , '09, Zachary Ray Moody , '07, J. Lopez, Nicholas J. Kaplinsky
Bobber1 Is A Noncanonical Arabidopsis Small Heat Shock Protein Required For Both Development And Thermotolerance, Dahlia Erin Perez , '08, J. S. Hoyer, Ayanna Iman Johnson , '09, Zachary Ray Moody , '07, J. Lopez, Nicholas J. Kaplinsky
Biology Faculty Works
Plants have evolved a range of cellular responses to maintain developmental homeostasis and to survive over a range of temperatures. Here, we describe the in vivo and in vitro functions of BOBBER1 (BOB1), a NudC domain containing Arabidopsis (Arabidopsis thaliana) small heat shock protein. BOB1 is an essential gene required for the normal partitioning and patterning of the apical domain of the Arabidopsis embryo. Because BOB1 loss-of-function mutants are embryo lethal, we used a partial loss-of-function allele (bob1-3) to demonstrate that BOB1 is required for organismal thermotolerance and postembryonic development. Recombinant BOB1 protein functions as a molecular chaperone and prevents …
Partitioning The Apical Domain Of The Arabidopsis Embryo Requires The Bobber1 Nudc Domain Protein, R. J. Jurkuta, Nicholas J. Kaplinsky, Jennifer Elizabeth Spindel , '10, M. K. Barton
Partitioning The Apical Domain Of The Arabidopsis Embryo Requires The Bobber1 Nudc Domain Protein, R. J. Jurkuta, Nicholas J. Kaplinsky, Jennifer Elizabeth Spindel , '10, M. K. Barton
Biology Faculty Works
The apical domain of the embryo is partitioned into distinct regions that will give rise to the cotyledons and the shoot apical meristem. In this article, we describe a novel screen to identify Arabidopsis thaliana embryo arrest mutants that are defective in this partitioning, and we describe the phenotype of one such mutant, bobber1. bobber1 mutants arrest at the globular stage of development, they express the meristem-specific SHOOTMERISTEMLESS gene throughout the top half of the embryo, and they fail to express the AINTEGUMENTA transcript normally found in cotyledons. Thus, BOBBER1 is required to limit the extent of the meristem domain …