Term
| Auxins: Example, General Description, and where made. |
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Definition
| IAA (indoleacetic acid); any concentration promotes shoot growth, high concentration inhibits root growth, but low concentration promotes it; Is made where there is active growth (meristems, young leaves, seeds, flowers, fruits). |
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Term
| Auxins: Effects & Miscellaneous. |
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Definition
| Cell elongation: root growth, branching (apical dominance), fruit development, and parthenocarpic fruit (fruits without seeds); Synthetic auxins: kills dicots, agent orange, weed killer (2-4D). |
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Term
| Cytokinins: Examples & where made. |
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Definition
| *Zeatin* and kinetin (doesn't occur naturally); Present where tissue is actively dividing (root tips, germinating seeds). |
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Term
| Cytokinins: Effects & Miscellaneous |
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Definition
| Cell division: germination, callus growth, and gall formation; Important in biotech, interacts with auxins to regulate division and differentiation. |
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Term
| Ethylene: Example & Where made. |
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Definition
| Hydrocarbon gas; In all tissues in response to stress, ripening or senescence, and fruits. |
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Term
| Ethylene: Effects & Miscellaneous. |
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Definition
| Fruit ripening, leaf & flower senescence, leaf & fruit abscission, and increase of female flowers in dioecious plants; Climacteric fruits shipping and storage because increases respiration at end of fruit maturation and beginning of senescence. |
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Term
| Abscisic Acid: Example & Where Made. |
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Definition
| Dormins; In plastids (leaves & fruits), response to water stress. |
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Term
| Abscisic Acid: Effects & Miscellaneous. |
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Definition
| Prevents seeds from germinating (promotes dormancy), stomatal closure in drought conditions, and bud leaves form scales to enclose meristem; Not involved in leaf abscission, growth inhibitor, apply to landscape plants in droughts to induce stomatal closure. |
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Term
| Gibberellins: Example & Where Made. |
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Definition
| "Foolish seedling" disease, GA3 from Fungus, over 110; Meristems of buds, roots, and leaves, seeds. |
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Term
| Gibberellins: Effects & Miscellaneous. |
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Definition
| Cell division & elongation, parthenocarpic fruits, seed germination (promotes growth of embryo), increase of males flowers in dioecious plants; increase in internode length of grapes and size of fruits. |
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