The study found that two proteins, ATH1 and KNAT2, work together to control how plant flowers are arranged. These proteins are part of a genetic network that helps determine the shape of the plant's inflorescence. When ATH1 is mutated, it affects the orientation of the pedicels (flower stalks) in a way that makes them point downwards. This shows that ATH1 plays a role in regulating pedicel orientation. The researchers discovered that ATH1 physically interacts with KNAT2, another protein involved in this process. Together, ATH1 and KNAT2 work with KNAT6 to ensure that pedicels develop correctly. This study sheds light on how these proteins collaborate to shape the structure of plant inflorescences.