Term
Factors Influencing Transpiration What are the four main factors that affect transpiration? |
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Definition
- Temperature
- Humidity
- Air Currents
- Action of Stomata
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Term
Factors Influencing Transpiration Temperature When the temperature is higher, what happens to the rate of transpiration? |
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Definition
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Term
Factors Influencing Transpiration Humidity When the humidity is higher, what happens to the rate of transpiration? |
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Definition
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Term
Factors Influencing Transpiration Air Currents When there are more air currents, what happens to the rate of transpiration? |
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Definition
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Term
Factors Influencing Transpiration Action of stomata What are the factors involving stomatal movements? |
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Definition
Availability of water and C02 concentration ** Factors Influencing Transpiration ** not complete |
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Term
Factors Influencing Transpiration Action of stomata What happens to the stomata when there is low H2O availability? |
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Definition
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Term
Factors Influencing Transpiration Action of stomata What happens when there are high levels of CO2? What senses the high levels? |
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Definition
stomatas close guard cells |
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Term
**need to finish transpiration** |
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Definition
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Term
Plants Hormones What are three general characteristics of plant hormones? |
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Definition
- work in small amounts
- work in combination with other hormones
- break down easily
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Term
Plant Hormones Definition: Phototropism |
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Definition
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Term
Plant Hormones Phototropism and auxin What did the two early experiments find out? |
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Definition
Charles + Francis Darwin-phototropism involved in shoot tip Fritz Went-chemicals were involved, NOT external stimulis |
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Term
Plant Hormones What does auxin do and how is it triggered? |
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Definition
| Auxin stimulates elongation of cells on the dark side of a plant. It is triggered by changes in membrane permeability |
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Term
Plant Hormones How is auxin transported? (What direction is it transported in?) |
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Definition
| In one direction only--from root to tip |
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Term
Plant Hormones Auxin When in acidic conditions, what happens to the cell wall? |
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Definition
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Term
Plant Hormones What is turgor pressure and what does it do? |
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Definition
| Turgor pressure is the water pressure inside the cell. It expands the cell |
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Term
Plant Hormones What are four other effects of phototropism and auxin? |
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Definition
- Apical dominance-inhibits growth of auxillary buds
- Involved in seasonal initiation of vascular cambium
- Involved in development of secondary xylem and phloem
- Involved in fruit development
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Term
Plant Hormones What does cytokinins do? |
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Definition
Stimulates cell growth Other effects Reverses apical dominance Prevents senescense of leaves |
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Term
Plant Hormones What are ethylenes and what do they do? |
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Definition
Gaseous hormones Stimulate fruit ripening |
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Term
Plant Hormones Ethylene What is ethylene responsible for? |
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Definition
Changes in fruit color, texture, and chemical composition |
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Term
Plant Hormones Ethylene Where is ethylene synthesized? |
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Definition
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Term
Plant Hormones Definition: Abscission |
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Definition
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Term
Plant Hormones Ethylene is produced in the abscission layer--what does it regulate and what does it synthesize? |
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Definition
regulates leaf drop stimulates synthesis and release of cellulase |
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Term
Plant Hormones Steps of ethylene |
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Definition
- Made in cell membrane
- Found in abscission layer --two layers weak layer and protective layer
- stimulates synthesis and release of cellulase
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Term
Plant Hormones What is abscicic acid known as? |
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Definition
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Term
Plant Hormones What does abscicic acid bring about? |
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Definition
| the closing of the stomata |
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Term
Plant Hormones What does abscicic acid maintain? |
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Definition
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Term
Plant Hormones What does abscicic acid induce in vegetative buds? |
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Definition
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Term
Plant Hormones What does the gibberellins produce? |
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Definition
| hyper-elongation of stems |
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Term
Plant Hormones What does the gibberellins induce? |
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Definition
| cellular differentiation of the vascular cambium into phloem |
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Term
Plant Hormones In the gibberellins, during the germination of grains, what does it stimulate? |
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Definition
| the production of enzymes necessary for growth of the embryo |
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