Term
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Definition
| A hormone is an organic substance that are produced endogenously and affect the growth and development at very low concentrations. |
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Term
| Define a Plant Growth Regulator. (PGR) |
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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. |
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Term
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Definition
| Originates from inside the plant |
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Term
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Definition
| Something that originates or is derived from external sources. |
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Term
| What are the 5 groups of PGRs? |
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Definition
1. Auxins 2. Gibberellins 3. Cytokinins
4. Ethylene 5. Abscisic Acid (ABA) |
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Term
| Name three types of Auxins. |
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Definition
| IAA, 2-4-D, IBA(synthetic) |
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Term
| Name 3 Functions of an Auxin. |
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Definition
| Root Promoter, Prevents harvest drop, Promotes flowering. |
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Term
| Describe a Gibberellin. (GA) |
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Definition
| Gibberellins are derived from a fungus which the GAs are extracted and once applied can promote rapid growth. |
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Term
| Name 3 functions of GA Gibberellins. |
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Definition
| Cell Division and elongation, Fruit production, breaking dormancy in seeds |
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Term
| Name 3 functions of a Cytokinin. |
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Definition
| Cell Division, Differentiation(shoot initiation and growth), delay aging in leaves and fruits. |
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Term
| Name 3 functions of Ethylene. |
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Definition
| Promotes fruit ripening, Promotes flowering, Induces abscission(flower and leaf drop) |
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Term
| Name 3 functions of Abscisis Acid (ABA). |
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Definition
| a natural inhibitor of bud and seed dormancy, Leaf abscission, may also promote flowering in some short day plants. |
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