Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
6th Edition
ISBN: 9780134555430
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 26, Problem 10LTB
Summary Introduction
Introduction:
Plant hormones are the chemical substances produced by the plants in small quantities. These hormones are essential for the growth and development of the plant. Plant hormones are produced by the specialized cells. These plant hormones play important role in reproduction, growth and defense mechanism.
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Briefly define what a plant hormone is. Also, explain, using an example for each, of how hormones can both work together and work against each other when they are received by a particular part of a plant.
In bullet points or short paragraphs. No images.
Which of the following is not a characteristic of plant hormones?
They are active in small concentrations
They are synthesized in specific glands and tissues
They are pleiotropic in their effects
Plant hormones are tissue and time-specific
Define what a plant hormone is. Also, explain, using an example for each, of how hormones can both work together and work against each other when they are received by a particular part of a plant.
Chapter 26 Solutions
Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
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- Plant growth... hormones only have very specific, limited functions is centrally regulated by the plant nervous system only involves hormones made at the site of action can vary in response to environmental conditions all of the abovearrow_forwardYou have been chosen as the lead student gardener for the CSUMB Future Farmers of America Club (FFAC). Your club is looking to you and your Bio211 plant experience to guide them. You arrive at the new FFAC garden plots and notice that while there are many fruits on the apple tree, they seem to remain hard, sour, and green. Your club mates need the red, sweet apples in just a few days for the apple competition. Choose the best hormone to apply and the reason supporting its use: Select one: a. Apply ethylene to the apples to increase ripening. b. Apply ethylene to slow ripening and increase chlorophyll levels. c. Apply auxin to increase parthenocarpy d. Apply gibberellins to increase fruit size. e. Apply auxins to decrease apical dominance and increase water intake.arrow_forwardWhich of these are plant hormones? Starch Nicotine Palmitic acid Ethylenearrow_forward
- discuss five (5) plant hormonesarrow_forwardDescribe two general chemical features that distinguish plant hor- mones from animal hormones.arrow_forwardVolatile Secondary Metabolites in Plant Stress Responses In 2007, researchers Casey Delphia, Mark Mescher, and Consuelo De Moraes (pictured at left) published a study on the production of different volatile chemicals by tobacco plants in response to predation by two types of insects: western flower thrips and tobacco budworms. Their results are shown in FIGURE 30.20. Volatile Compound Produced Treatment C T W WT HV HVT Myrcene 0 0 0 0 17 22 -Ocimene 0 433 15 121 4.299 5.315 Linatod 0 0 0 0 125 178 indole 0 0 0 0 74 142 Nicotine 0 0 233 160 390 538 -Etemene 0 0 0 0 90 102 -Caryophyllene 0 100 40 124 3.704 6.166 -Humutene 0 0 0 0 123 209 Sesquiterpene 0 7 0 0 219 268 -Farnesene 0 15 0 0 293 457 Caryophyltene oxide 0 0 0 0 89 166 Total 0 555 288 406 9.423 13.563 FIGURE 30.20 Volatile (airborne) compounds produced by tobacco plants (Nicotiana tabacum) in response to predation by Different inserts. Plants were untreated (C), attacked by thrips (T), mechanically wounded (W). mechanically wounded and attacked by thrips (WT), attacked by budworms (HVJ, or attacked by budworms and thrips (HVTJ. Values are nanograms/day. 4. Are any chemicals produced in response to predation by budworms, but not in response to predation by thrips?arrow_forward
- Volatile Secondary Metabolites in Plant Stress Responses In 2007, researchers Casey Delphia, Mark Mescher, and Consuelo De Moraes (pictured at left) published a study on the production of different volatile chemicals by tobacco plants in response to predation by two types of insects: western flower thrips and tobacco budworms. Their results are shown in FIGURE 30.20. Volatile Compound Produced Treatment C T W WT HV HVT Myrcene 0 0 0 0 17 22 -Ocimene 0 433 15 121 4.299 5.315 Linatod 0 0 0 0 125 178 indole 0 0 0 0 74 142 Nicotine 0 0 233 160 390 538 -Etemene 0 0 0 0 90 102 -Caryophyllene 0 100 40 124 3.704 6.166 -Humutene 0 0 0 0 123 209 Sesquiterpene 0 7 0 0 219 268 -Farnesene 0 15 0 0 293 457 Caryophyltene oxide 0 0 0 0 89 166 Total 0 555 288 406 9.423 13.563 FIGURE 30.20 Volatile (airborne) compounds produced by tobacco plants (Nicotiana tabacum) in response to predation by Different inserts. Plants were untreated (C), attacked by thrips (T), mechanically wounded (W). mechanically wounded and attacked by thrips (WT), attacked by budworms (HVJ, or attacked by budworms and thrips (HVTJ. Values are nanograms/day. 3. Which one of the chemicals tested is most likely produced by tobacco plants in a nonspecific response to predation?arrow_forwardList some examples of plant hormones.arrow_forwardThree applications of plant hormones in agriculture.arrow_forward
- Describe the Function of Plant hormonesarrow_forwardMatch each hormone to its function or application. NOTE: If none of the options are correct, you MUST select #4for 'none of the above', otherwise it will be graded as incorrect Question 14 options: Auxin Giberellins Cytokinins Ethylene 1. Used in anti-aging skin creams. 2. Ripens fruit. 3. Causes stems to bend towards the light. 4. None of the abovearrow_forwardGreenhouse-grown tomato seedlings are often brushed by hand to simulate wind. This causes seedlings to grow slower, thicken stems, & resist mechanical wind damage when planted in the field. Which hormone is responsible? Auxin Salicylic acid Gibberellin Abscisic acid cytokinin Ethylenearrow_forward
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