Plants make seeds that can grow into new plants, but if the seeds just fall to the ground under the parent plant, they might not get enough sun, water or nutrients from the soil. Because plants cannot walk around and take their seeds to other places, they have developed other methods to disperse (move) their seeds. The most common methods are wind, water, animals, explosion and fire.

1. NANDITHA AKUNURI
REPRODUCTION IN PLANTS
SEED DISPERSAL
CLASS-VII
CBSE

2. Plants make seeds that can grow into new plants, but if the seeds just
fall to the ground under the parent plant, they might not get enough
sun, water or nutrients from the soil. Because plants cannot walk
around and take their seeds to other places, they have developed
other methods to disperse (move) their seeds. The most common
methods are wind, water, animals, explosion and fire.

3. Seeds are the unit of the reproduction of a flowering plant that is
capable to develop into a single plant. In some species of plant, like
walnuts, groundnuts, and chickpeas, seeds are also used as sources of
food. A fully grown and developed seed has three primary parts: the
embryo, endosperm, and seed coat. The plumule is present in the
seed embryo, which develops into a new plant.

4. Seed Dispersal by Wind
The wind is the natural and fundamental means of seed dispersal in
the plant kingdom. This process of dispersal is mainly seen in those
plants which bear very light seeds. The seeds of the orchid plant,
dandelions, swan plants, cottonwood tree, hornbeam, ash, cattail,
puya, willow herb, are all examples of plants whose seed are
dispersed by the wind.

5. Seed Dispersal by Water
In this method of seed dispersal, seeds float away from their parent
plant. These are mainly seen in those plant which lives in water or
nearby the water bodies like beaches, lakes, ponds etc. Coconut,
palm, mangroves, water lily, water mint, are a few examples of
plants whose seed are dispersed by the water.

6. Animals and birds eat fruits; seeds that are not digested are excreted
in their droppings some distance away. Some animals, such as
squirrels, bury seed-containing fruits for later use; if the squirrel
does not find its stash of fruit, and if conditions are favorable, the
seeds germinate.

7. Some fruits have hooks or sticky structures that stick to an animal’s
coat and are then transported to another place. Humans also play a
major role in dispersing seeds when they carry fruits to new places,
throwing away the inedible part that contains the seeds.

8. This method of seed dispersal isn’t quite as exciting as it may sound.
Some plants, like peas, gorse and flax, have seedpods that dry out
once the seeds are ripe. When dry, the pods split open and the seeds
scatter. If you’re lucky, on a hot summer day when you walk by a
gorse bush, you will hear the gorse seedpods popping open.

9. THANKYOU
BY
NANDITHAAKUNURI