A seed coat protects the internal parts of the seed from fungi, bacteria and insects and prevents water loss. The seed coat must split open before a new plant may emerge.
The outer layer of the seed coat, called the testa, is generally hard and thick. The second layer of the seed coat, known as the tegmen, is softer. In some plants, the seed coat does not open unless environmental conditions are ideal for plant growth. This condition is known as dormancy. In many plants, the seed coat covers storage tissues. The embryonic plant uses these food reserves until it is able to emerge from the seed coat and make its own food.Learn More
Agapanthus can be grown from seed. Also known as African lilies, Agapanthus plants are slow to germinate and can take up to five years before blooming when grown from seed.Full Answer >
Planting containers, gravel, soil and plastic film are needed to grow rosemary from seeds. This way of growing rosemary is often not preferred due to the time-consuming germination process, but the gardener is rewarded with the easy maintenance, fragrant scent and large size of a mature rosemary plant upon success.Full Answer >
The lower epidermis contains stomata cells that help prevent water loss and regulate the exchange of gases such as oxygen and carbon dioxide, enabling plants to survive. Other cells in the lower epidermis include a waxy cuticle to protect underlying layers, according to Education Portal. Transparency in epidermal cells allows sunlight to pass through to chloroplasts, which are involved in photosynthesis.Full Answer >
Hybrid seeds are expensive because the company that produces them spends a lot of money on research and development that often takes years to accomplish. The yield of hybrid seeds is also significantly higher than original seeds.Full Answer >