ATPase associated with various cellular activities (AAA) proteins are important regulators involved in diverse cellular functions.To date, the molecular mechanisms of AAA proteins involved in response to salt and drought stresses in plants are largely unknown.In this study, a putative SKD1 (suppressor of K+ transport growth defect 1) ortholog from Zea mays (ZmSKD1), which encodes a putative AAA protein, was isolated.