Describe the morphology of coconut endosperm

In Cocos nucifera (coconut) the endosperm develops inside the seed and exists in two main morphological forms: the liquid endosperm (commonly “coconut water”) and the solid endosperm (the white “meat” or copra). The liquid endosperm is a clear to slightly cloudy fluid filling the embryo-sac cavity when the nut is immature and persists into maturity. It contains sugars, amino acids, vitamins and phytohormones.

The solid endosperm begins as a thin jelly layer around the cavity, then cellular endosperm tissue develops around 6 months with cells accumulating oil (approximately 46% in solid endosperm) and nutrients. The solid endosperm is thick, firm, white with parenchyma cells rich in lipids and storage reserves. Together they provide nutrient reserve for embryo growth.