Kathleen M. Brown

Plant roots sense soil compaction through restricted ethylene diffusion

Science · 2021-01-14 · 293 citations

Ethylene aplenty signals soil compaction It's tough to drive a spade through compacted soil, and plant roots seem to have the same problem when growing in compacted ground. Pandey et al. found that the problem is not, however, one of physical resistance but rather inhibition of growth through a signaling pathway. The volatile plant hormone ethylene will diffuse through aerated soil, but compacted soil reduces such diffusion, increasing the concentration of ethylene near root tissues. The cellula…

Multiseriate cortical sclerenchyma enhance root penetration in compacted soils

Proceedings of the National Academy of Sciences · 2021-02-03 · 148 citations

) associated with penetration of hard soil: Multiseriate cortical sclerenchyma (MCS). We characterize this trait and evaluate the utility of MCS for root penetration in compacted soils. Roots with MCS had a greater cell wall-to-lumen ratio and a distinct UV emission spectrum in outer cortical cells. Genome-wide association mapping revealed that MCS is heritable and genetically controlled. We identified a candidate gene associated with MCS. Across all root classes and nodal positions, maize genot…

Multiple Integrated Root Phenotypes Are Associated with Improved Drought Tolerance

PLANT PHYSIOLOGY · 2020-04-24 · 148 citations

) genotypes under well-watered and water-stressed conditions in the field. We found substantial variation in all 23 root phenes measured. A phenotypic bulked segregant analysis revealed that bulks representing the best and worst performers in the field displayed distinct root phenotypes. In contrast to the worst bulk, the root phenotype of the best bulk under drought consisted of greater cortical aerenchyma formation, more numerous and narrower metaxylem vessels, and thicker nodal roots. Partiti…

Optimizing Advanced Imaging of the Pediatric Patient in the Emergency Department: Technical Report

PEDIATRICS · 2024-06-27 · 18 citations

Advanced diagnostic imaging modalities, including ultrasonography, computed tomography, and magnetic resonance imaging, are key components in the evaluation and management of pediatric patients presenting to the emergency department. Advances in imaging technology have led to the availability of faster and more accurate tools to improve patient care. Notwithstanding these advances, it is important for physicians, physician assistants, and nurse practitioners to understand the risks and limitatio…

Access to Critical Health Information for Children During Emergencies: Emergency Information Forms and Beyond

Annals of Emergency Medicine · 2023-02-20 · 7 citations