How plants sense gravity could unlock denser, sturdier crops
Zhu L, Long Y, Han J, Ji K, Wu J
Crop Improvement
The way a corn plant angles its leaves and roots in response to gravity determines whether a packed field of crops stands tall in a storm or topples over, and breeders could soon tweak that response on purpose.
Every plant uses gravity as a compass, growing shoots up toward light and roots down toward water, and the angle it chooses for leaves, roots, and tillers affects how well it survives crowding, wind, and drought. Researchers pulled together decades of scattered gene discoveries into one roadmap and used it to flag 69 genes in maize that likely control these gravity responses. Breeders could use that roadmap to engineer crops with steeper leaves, deeper roots, or stronger stalks, letting farmers plant more densely and lose fewer plants to lodging.
Key Findings
The review synthesizes gravitropic gene pathways across crops controlling rice tiller angle, maize leaf angle, and root growth angle and depth
Researchers predicted 69 candidate gravitropic genes in maize through homology alignment and tissue expression analysis
Root angle and depth are linked to both lodging resistance and efficiency of water, nutrient, and ion uptake
chevron_right Technical Summary
Scientists reviewed how gravity controls plant shape, from root angles to leaf tilt, and identified 69 candidate genes in maize that could help farmers grow crops closer together without them falling over or losing access to water and nutrients.
Abstract Preview
Original paper
Gravity-shaped plant architecture to enhance dense planting, lodging resistance and substance uptake and their applications in maize and other crop breeding.
Gravity is a ubiquitous environmental force that shapes plant architecture. Shoots occupy aerial space to absorb light and carbon dioxide, while roots spread in soil to capture water and nutrients....
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Maize, also known as corn in North American English, is a tall stout grass that produces cereal grain. The leafy stalk of the plant gives rise to male inflorescences or tassels which produce pollen, and female inflorescences called ears. The ears yield grain, known as kernels or seeds. In modern ...