Required for cytoplasm to vacuole transport (Cvt) and autophagy as a part of the autophagy-specific VPS34 PI3-kinase complex I (By similarity). This complex is essential to recruit the ATG8-phosphatidylinositol conjugate and the ATG12-ATG5 conjugate to the pre-autophagosomal structure (By similarity). ATG14 mediates the specific binding of the VPS34 PI3-kinase complex I to the preautophagosomal structure (PAS) (By similarity). Autophagy is required for proper vegetative growth, asexual/sexual reproduction, and full virulence (PubMed:28894236). Autophagy is particularly involved in the biosynthesis of deoxynivalenol (DON), an important virulence determinant (PubMed:28894236). Component of the autophagy-specific VPS34 PI3-kinase complex I (By similarity). Coiled-Coils at the N-terminal half are essential for autophagy (By similarity). Significantly decreases the radial growth of colonies under nutrient-rich conditions (PubMed:28894236). Strongly reduces conidiation (PubMed:28894236). Causes only mild infection in point-inoculated spikelets of flowering wheat heads and impairs the spreading to nearby spikelets (PubMed:28894236). Belongs to the ATG14 family.