Shared Flashcard Set

Details

Plant Growth Regulators
Intro to Horticulture
12
Agriculture
7th Grade
12/01/2011

Additional Agriculture Flashcards

 


 

Cards

Term
Define the word
Hormone.
Definition
A hormone is an organic substance that are produced endogenously and affect the growth and development at very low concentrations.
Term
Define a Plant Growth Regulator. (PGR)
Definition
A Plant Growth Regulator is an organic substance that can be natural or synthetic that affect plant growth and/or development.PGRs include hormones, but hormones do not include all PGRs.
Term
Endogenous
Definition
Originates from inside the plant
Term
Exogenous
Definition
Something that originates or is derived from external sources.
Term
What are the 5 groups of PGRs?
Definition
1. Auxins 2. Gibberellins 3. Cytokinins
4. Ethylene 5. Abscisic Acid (ABA)
Term
Name three types of Auxins.
Definition
IAA, 2-4-D, IBA(synthetic)
Term
Name 3 Functions of an Auxin.
Definition
Root Promoter, Prevents harvest drop, Promotes flowering.
Term
Describe a Gibberellin. (GA)
Definition
Gibberellins are derived from a fungus which the GAs are extracted and once applied can promote rapid growth.
Term
Name 3 functions of GA Gibberellins.
Definition
Cell Division and elongation, Fruit production, breaking dormancy in seeds
Term
Name 3 functions of a Cytokinin.
Definition
Cell Division, Differentiation(shoot initiation and growth), delay aging in leaves and fruits.
Term
Name 3 functions of Ethylene.
Definition
Promotes fruit ripening, Promotes flowering, Induces abscission(flower and leaf drop)
Term
Name 3 functions of Abscisis Acid (ABA).
Definition
a natural inhibitor of bud and seed dormancy, Leaf abscission, may also promote flowering in some short day plants.
Supporting users have an ad free experience!