PO:0025263 locule A plant anatomical space that is a cavity a reproductive structure. PMID 25774204 fas SGN_gene 538 PMID 25774204 lc SGN_gene 881 PO:0025264 anther locule A sporangium locule that is part of an anther and is a cavity within a single pollen sac or two or more fused pollen sacs. PMID 16141453 UDT1 GR_gene 0080007