The seed coat is a vital tissue for directing nutrient supply to the embryo and cotyledons during development. By forming a sucrose gradient, the seed coat promotes transport of sugars from source leaves to seeds, thereby increasing sink strength. Understanding how gene regulation in sink tissue is altered by climate change factors will help elucidate the role these genes play in determining yield. This project aims to determine how elevated temperature, drought and ozone alter gene expression in the seed coat. Overall this study discovered high abundance seed coat specific genes, which may be candidates for functional genomic analysis in the future.