Role for calcium in the development of ovarial patency in Heliothis virescens

The results of our study suggest that JH II evokes patency via protein kinase C-dependent signaling pathway, and activation of Na+/K+-ATPase, similar to JH III. Response to JH II and JH III predominantly relies upon external and internal calcium stores, using voltage-dependent calcium channels, IP3Rs and RyRs. In contrast, regulation of patency by JH I appears to be largely calcium independent, and the calcium-dependent component of the signaling pathway likely does not use IP3Rs, but RyRs only. The JH II, JH III and calcium-dependent component of JH I signaling pathway probably utilize calcium/calmodulin-dependent kinase II for activation of Na+/K+-ATPase.