US: Researchers discover a novel gene that could lead to more resilient corn crops

The researchers identified a gene encoding a transcription factor (a protein useful for converting DNA into RNA) that activates a genetic sequence responsible for the development of an important trait that allows corn roots to acquire more water and nutrients, according to findings published in the Proceedings of the National Academy of Science. According to research team leader Jonathan Lynch, distinguished professor of plant science, that observable property, or phenotype, is called root cortical aerenchyma and results in the formation of air passageways in the roots. His Penn State colleagues discovered that this genotype makes roots metabolically cheaper, allowing them to better explore the soil and acquire more water and nutrients from dry, barren soil. Identifying the genetic mechanism underlying the trait now creates a breeding target, according to Lynch, whose research group in the College of Agricultural Sciences has been studying root traits in corn and beans for more ...