The shape of the orange capsule is usually round or oval, and the specific shape varies depending on the variety and maturity of the orange. The shape of the orange capsule is mainly determined by the arrangement of the juice cells inside it, which is usually in the shape of capsule valves, and each capsule valve grows around the central column.
The internal structure of the orange capsule includes juice cells and seeds. Juice cells are the main edible part of the orange capsule. They are arranged in the form of multiple carpels, each carpel forms a capsule valve, and the septum between each ventricle is an extension of the mesocarp and endocarp tissue. The outside of the orange capsule is composed of the exocarp, mesocarp and endocarp, among which the exocarp is the epidermal cells, the mesocarp is the spongy layer, and the endocarp is the inner epidermis and parenchyma.
The color of the orange capsule will also change with the maturity. When it is immature, it contains chloroplasts and the color is green. Before maturity, it turns into chromoplasts and the color gradually changes to orange-yellow or orange-red. This color change not only increases the beauty of the orange, but also indicates its maturity.
