Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 30, Problem 3DAA
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 |
| β-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 |
| β-Etemene | 0 | 0 | 0 | 0 | 90 | 102 |
| β-Caryophyllene | 0 | 100 | 40 | 124 | 3.704 | 6.166 |
| α-Humutene | 0 | 0 | 0 | 0 | 123 | 209 |
| Sesquiterpene | 0 | 7 | 0 | 0 | 219 | 268 |
| α-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?
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Chapter 30 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
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