has part has part has_part develops_from develops from megasporocyte portion of plant tissue megaspore tetrad of megaspores t&#233trada de megasporas (Spanish, exact) plant_anatomy PO:0025227 Usually only one of the four megaspores develops and the other three die. 2010-12-20T09:08:29Z rwalls A portion of plant tissue consisting of four megaspores that remained joined together shortly after meiosis. One cell will give rise to a female gametophyte. 大胞子の四分子 (Japanese, exact) anatomical entity