Natural History Museum;
Greensboro;
Biotechnology and Food Science;
Norway;
Plant and Crop Sciences;
USA||Vegetable & Flower Seeds Development;
CR Leiden;
Montpellier;
Norwegian University of Life Sciences;
Iowa State University;
Department of Biology;
UK;
IA;
Netherlands||Institut de Recherche pour le Developpement;
Norway||Naturalis Biodiversity Center;
University of Nottingham;
Faculty of Chemistry;
Stanford University;
USA;
Oslo;
NC;
University of North Carolina;
Syngenta Crop Protection LLC;
University of Oslo;
School of Biosciences;
Stanford;
Norway||Natural History Museum;
As;
Department of Agronomy;
France;
Sutton Bonington;
Ames;
Chapel Hill;
USA||Howard Hughes Medical Institute;
CA;
期刊名称：
Science
i s s n：
0036-8075
年卷期：
2025 年
387 卷
Feb.7 TN.6734 期
页 码：
666-673
页 码：
摘 要：
Plants grow complex root systems to extract unevenly distributed resources from soils. Spatial differences in soil moisture are perceived by root tips, leading to the patterning of new root branches toward available water in a process called hydropatterning. Little is known about hydropatterning behavior and its genetic basis in crop plants. Here, we developed an assay to measure hydropatterning in maize and revealed substantial differences between tropical/subtropical and temperate maize breeding germplasm that likely resulted from divergent selection. Genetic analysis of hydropatterning confirmed the regulatory role of auxin and revealed that the gaseous hormone ethylene locally inhibits root branching from air-exposed tissues. Our results demonstrate how distinct signaling pathways translate spatial patterns of water availability to developmental programs that determine root architecture.
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