This type of plant completes its life cycle in two years.
What is a biennial?
100
An initial condition that prevents seeds from germinating immediately after being shed from the plant is known as this.
What is primary dormancy.
100
For rooting cuttings and germinating seedlings we strive for an environment with ______ humidity and _________ temperatures.
a. high, high
b. low, low
c. low, high
d. high, low
What is a, high humidity and high temperatures.
100
The initial stage of water uptake in seeds is known as:
a. initial drink
b. inhibition
c. aquabition
d. imbibition
What is d, imbibition.
100
This type of seed can be dried and stored for longer than three months.
a. orthodox
b. dehiscent
c. non-deep dormant
d. recalcitrant
What is a, orthodox.
200
The ideal temperature for germination in most plants is:
a. 55 - 60 F
b. 60 - 65 F
c. 65 - 70 F
d. 70 - 75 F
What is C, 65 - 70 F.
200
A dormancy condition that occurs outside the seed embryo is referred to as this.
What is an exogenous dormancy.
200
Coldframes and lathe houses are examples of structures used to create this type of environment for propagules:
a. acclimatizing
b. finishing
c. grow-on
d. germination
What is a, acclimatizing.
200
Which of the following is not an initial requirement for germination?
1. viable seed
2. proper environment
3. soil
4. dormancies overcome
What is 3, soil medium.
200
The storage of seeds or vegetative plants at -197C is known as this.
What is cryopreservation.
300
Along with proper cultural care, these are used to control internode elongation in plants.
What are Plant Growth Regulators?
300
List two ecological benefits of seed dormancy.
1. Seedling survival (ensures seeds germinate at the right time)
2. Seed bank (ensures not all seeds germinate in the same year)
3. Ensures seeds germinate & flower at the same time (promotes outcrossing)
300
Plant roots that are trained into a circular pattern are referred to as this.
What is rootbound.
300
This is the term for phase II of seed germination, where fresh weight of the seed is not increasing, but metabolic activity is occuring.
What is the 'lag' phase.
300
This is an indicator of seed maturity to determine proper harvest time.
What is seed moisture?
400
This is a non-profit, educational organization that evaluates new bedding plant varieties.
What is All American Selections?
400
A hard seedcoat that is impenetrable to water is an example of an:
a. physical primary endogenous dormancy
b. physical primary morphological dormancy
c. physical primary exogenous dormancy
d. physical primary physiological dormancy
What is c, physical primary exogenous dormancy.
400
EC in water used for propagation should not exceed:
a. 0.10 mm/dcm
b. 0.25 mm/dcm
c. 0.50 mm/dcm
d. 0.75 mm/dcm
What is d, 0.75 mm/dcm.
400
This is a plant hormone generally known to inhibit seed germination.
What is ABA or abscisic acid?
400
The best method of collecting dry seeds that dehisce at maturity is to:
a. harvest them at maturity using a specialized machine like a combine
b. harvest them before maturity
c. place a collection matt on the ground to catch seeds as they dehisce.
d. none of the above.
What is b, harvest them just before maturity.
500
These allow a grower to evaluate a bedding plant's performance in the landscape.
What is a display garden?
500
The most common dormancy seen in seeds is known as this.
a. physical exogenous dormancy
b. chemical exogenous dormancy
c. deep physiological endogenous dormancy
d. non-deep physiological endogenous dormancy
What is d, non-deep physiological endogenous dormancy.
500
This term refers to any factor influenced by the soil or propagation medium.
What are edaphic factors.
500
Name, to the genus level, three organisms that are involved in 'damping off'.
-Rhizoctonia
-pythium
-phytophtora
-botrytis
500
According to the Federal Seed Act of 1939, seeds travelling across borders must be labelled. List the 4 criteria that must be included on each label.
- Name & Cultivar
- Origin
- Germination Percentage
- Percentage of pure seed