A seed needs wet soil to germinate into a tree for several reasons:
1. Water is essential for hydration:
* Seeds are dormant and dry.
* Water softens the seed coat, allowing the embryo inside to absorb water and begin growing.
* It also helps break down the food reserves within the seed, making them accessible to the growing embryo.
2. Water is vital for cellular processes:
* Germination requires a lot of energy, which is produced through cellular respiration.
* Water is essential for cellular respiration, which involves the breakdown of sugars to release energy.
3. Water helps dissolve nutrients:
* Seeds contain stored nutrients, but these need to be dissolved in water before they can be absorbed by the developing seedling.
* Water in the soil also dissolves essential minerals that the seedling needs for growth.
4. Water provides support:
* Water keeps the soil moist and provides support for the young seedling as it emerges from the ground.
* This support helps the seedling stand upright and access sunlight for photosynthesis.
5. Water helps with seed dispersal:
* For some seeds, water is a key component of dispersal.
* Seeds of some trees, like willows, are dispersed by water currents.
In summary: Water plays a crucial role in every stage of seed germination, from softening the seed coat to providing energy and nutrients for the developing seedling. Without adequate moisture, the seed cannot successfully germinate and grow into a tree.
