propagation to increase the number of plants, reproducing plants sexual propagation propagation with...
TRANSCRIPT
Propagation
To increase the number of plants, reproducing plants
Sexual Propagation
Propagation with seed
Asexual Propagation
Propagation without seed
Fast way to get many plants
Easy to do
Economical
Some plants do not reproduce true to parents.
Some plants are difficult to propagate from seeds.
Direct Sow - Seeds are sown directly in container in which they
are grown
Indirect Sow – Seeds are sown in one container and transplanted to another after their true leaves
appear.
Monocot – Produce one seed leaf.
Example: Corn
Dicot – Produce two seed leaves.
Example: Bean
Mature Seed – Stage where a seed can be removed from the plant without hurting its
germination.
Viable Seed – Seeds that are live and will germinate.
Seed Coat – Outside covering of the seed which
protects the embryonic plant.
Cotyledon – The first leaves to appear on a plant; seed
leaves
Embryo – The new plant that is developed as a result of
fertilization (the seed).
Endosperm – Food storage tissue which nourishes the
embryonic plant during germination.
Epicotyl – The stem located above the cotyledons of a
seedling.
Hypocotyl – The stem tissue located between the seedling
root and the cotyledons.
Radicle – The primary seedling root. (turns into the
primary root)
Scarification – Scratching, chipping, or nicking of the
seed coat of certain seeds to promote germination.
Stratification – Exposing seeds to cool temperatures,
35-50F, for a period of time to break dormancy.
Planting seeds
When the young plant breaks the soil surface.
Germination Rate - % of seeds that germinate
EX: 75 out of 100 = 75%
Plant 500 seeds, 350 germinate, what is the germination rate?Answer: 350/500 = 70%
If you have a 75% germination rate and plant 240 seeds how many will germinate?Answer: 240/x = 75% so 240 * .75 = 180
You have 679 seeds germinate with a germination rate of 85% how many seeds did you plant?Answer: x * .85 = 679 so 679/.85 = 798.82 = 799
The Order of seed germination
Seedlings – Young plants which have germinated for
several days.
Seed Leaves – 1st set of leaves to appear, usually
rounded or oval.
True Leaves – 2nd set of leaves to appear, usually look
like plant’s adult leaves.
Transplant when the first true leaves appear.
Harden off – Reduction of water, humidity, and
temperature to prepare for transplanting.