Cereal caryopsis transport tissues are essential channels via which nutrients are transported into the embryo and endosperm. There are differences and similarities between caryopsis transport tissues of maize, sorghum and wheat. Vascular bundle, endosperm transfer cells, endosperm conducting cells and embryo surrounding region are common in maize, sorghum and wheat. Placentochalaza is special in maize and sorghum, while chalaza and nucellar projection transfer cells are special in wheat. There is an obvious apoplastic cavity between maternal and filial tissues in sorghum and wheat caryopses, but there is no obvious apoplastic cavity in maize caryopsis. Based on the latest research, the development and function of the three cereal caryopsis transport tissues are discussed and investigated in this paper.
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