High-conductance voltage-dependent solute channel with a slight selectivity for cations transporting triosephosphates, dicarboxylic acids, ATP, inorganic phosphate (Pi), sugars, and positively or negatively charged amino acids. Homooligomers form large rather nonselective pores in plastidial outer membranes. Present in non-green root plastids. Belongs to the plastid outer envelope porin OEP24 (TC 1.B.28.1) family.