seed coat
复数形式
seed coats
1
种皮, 种子外皮
the protective outer covering of a seed
The seed coat, also known as the testa, is the protective outer covering of a seed. It serves to safeguard the embryo within the seed from mechanical damage, pathogens, and dehydration. The seed coat varies in thickness, texture, and composition depending on the plant species. In some seeds, the coat may be thin and papery, while in others, it can be thick and hard. The seed coat also plays a role in regulating water and gas exchange during seed germination, helping to create optimal conditions for the embryo to sprout and grow. Additionally, the seed coat may contain chemical compounds that inhibit germination until environmental conditions are suitable for growth.
- I carefully removed the seed coat of the pumpkin seed before roasting it for a tasty snack.
在烤制美味的零食之前，我小心地去掉了南瓜籽的种皮。
- They observed how the seed coat of the coconut was tough and fibrous, helping to shield the inner seed.
他们观察到椰子的种皮是如何坚韧且纤维状的，有助于保护内部的种子。