Using a compact green plant, Purdue University researchers are unraveling mysteries about how genes affect plant growth and learning possible ways to control growth that eventually could lead to higher crop yields. The Purdue scientists cloned a gene in the plant Arabidopsis required for controlling development and shape of cells and tissue, said Daniel Szymanski, assistant professor of agronomy. The study detailing how a mutant form of the gene SPIKE1 affects plant development is published in the latest issue of The Plant Cell.