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6 Cards in this Set
- Front
- Back
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Hormone effective in:
type: synthesis deal: |
- effective in low concentration
- organic Carbon based. in animals - synthesized by cells in one part but physiological effect in other part of cell. |
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Growth Substance effective in:
Type: Synthesis in: |
low concen, plant. less specific in their actions
- Organic or inorganic - all metabolic active cells have capacity for synthesis. - physiological effect in producing cells or other cells. |
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5 molecular substances in plants
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auxins, gibberellins, cytokinins,
abscisic acid, ethylene |
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Auxins
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-first gs to be found
- most common in IAA compound- synthesized in meristem tissue |
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IAA- what it does?
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1. Promotes enlargement - elongation- more effective in stems
2. causes apical dominance (grow tall) inhibits development of lateral buds 3. controls tropism- plant growth in response to external stimulus. |
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3 types of trophism
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1. Phototrophism- growth in response to light
2. geotrophism- in response to gravity 3. Thigmotropism- to touch. -. windy- plant less tall - preditor- loose turgur pressure. |
