Transcript Germination of Plants

Germination of Plants
Germination
GERMINATION happens when a baby plant is growing. When a seed
begins to grow, we say it GERMINATES.
How Plants Grow
1.) When the seed starts to germinate, the first thing to
come out is the MAIN ROOT. This happens
UNDERGROUND so usually you can not see this happen.
2.) The skin starts to split and the tiny shoot straightens,
carrying the COTYLEDON(S) with it.
The cotyledons STORE FOOD for the baby plant inside the
seed.
The actual PLANT is between the cotyledons.
3.) The main root gets bigger and sometimes the plant
grows side roots, and the first LEAVES appear.
To grow, the seed's growing conditions usually have to be DAMP,
WARM, and DARK, like springtime soil.
A dry seed will stay DORMANT (not growing) unless it soaks in some water.
Then it will start to germinate.
Monocots vs. Dicots
1. Stems– Dicots- The TUBES are arranged in a
CIRCLE around the center of the plant stem.
Dicot
Monocot
– Monocots- Tubes are SCATTERED throughout
the stems in no particular PATTERN.
2.
Leaves– In dicots, the veins INTERSCET inside the leaf, forming a
BRANCHING pattern.
–
In monocots the veins are PARALLEL
3. Flowers– Dicots- There parts are in multiples of 2, 4 or
5.
– Monocots-Usually have flower parts that are
in multiples of 3.
4. Seeds– Monocots have ONLY ONE cotyledon
– Dicots have MORE THAN ONE cotyledon
5. Roots– Dicots usually have one long, thick root
called a TAP ROOT Small SECONDARY
roots grow from the taproot. The longer the
taproot, the harder it is to pull out of the
ground.
– Monocots have FIBROUS roots that
spread and branch out
UNDERGROUND. Much larger surface
area of the roots usually means
much larger plant growth.