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?
Want to see the full answer?
Check out a sample textbook solutionChapter 30 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
- Radiolabeling with 14C-Glutamate Describe the labeling pattern that would result from the introduction into the TCA cycle of glutamate labeled at Cy with 14C.arrow_forwardHomopolysaccharide are found abundant in nature. Explain how this class ofpolysaccharide acts as primary component of plants and insects.arrow_forwardThe herbicide glyphosate (Roundup®) kills plants. Discuss all the Biochemistry involved as to why this powerful herbicide has little effect on humans.arrow_forward
- distribution of Benzene in a 4-compartment PBK model after an exposure of 6h. Convert Berkeley Madonna code to Matlab. Note: The parameters in the table below are for a mouse model. 1a) What are the two type of products containing Benzene consumers were recently concerned about. Which of these two different type of products is likely more harmful? (hint: check news/reports and social media channels) 1b) Plot Jresp along with the concentrations of Benzene in blood, fat, non-fat and liver in a 24h window (pdf). Why is Jresp slightly decreasing within 6h of exposure? Here is the Berkeley Madonna code: {Top model} METHOD RK4 STARTTIME = 0 STOPTIME = 24 DT = 0.02 {Reservoirs Blood, Fat, NonFat and Liver} d/dt (NF) = + Jnf INIT NF = 0 d/dt (F) = + Jf INIT F = 0 d/dt (B) = - Jnf - Jf - Jl + Jresp INIT B = 0 d/dt (L) = + Jl - Jmetab INIT L = 0 {Flows} Jnf = Qnf*(Cb-Cnf) Jf = Qf*(Cb-Cfv) Jl = Ql*(Cb - Clv) Jmetab = vmax*Cl/(Km +…arrow_forwardAside from Avocado seeds, what are the other excellent materials for production of Granular Activated Carbons (GAC)?arrow_forwardOne mechanism by which lead exerts its poisonous effect on enzymes can be stopped by chelation therapy with EDTA. Describe this type of lead poisoning and explain why it is reversible.arrow_forward
- The conversion of pyruvate into oxaloacetate is an anaplterotic reaction to replenish citrus acid cycle metabolites that were used up during animalism. True or falsearrow_forward15. G + C Content: Describe how the G+C content of an organism can be measured. In your response, be sure to address the following: b. Explain the principles behind a melting curve and how this helps determine G + C content. Include an explanation of the components of the curve and how one would interpret a melting curve.arrow_forwardcan somone please List the components of the enzyme complex involved in the transition step and Simply describe what does each component does? 1. 2. 3. ect..arrow_forward
- What is the relationships between Kcat and that of stability. How is Kcat related to activation energy?arrow_forwardJ. C. Servaites, in Plant Physiol. (1985) 78:839–843, observed that Rubisco from tobacco leaves collected before dawn had a much lower specific activity than the enzyme collected at noon. This difference persisted despite extensive dialysis, gel filtration, or heat treatment. However, precipitation of the predawn enzyme by 50% (NH4)2SO4 restored the specific activity to the level of the noon-collected enzyme. Suggest an explanation.arrow_forwardThis is an absorption spectrum of plant leaf extract. Why does a plant contain an accessory pigment like phycoerythrin in addition to chlorophyll? In other words, what is the benefit to the plant?arrow_forward
- BiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage Learning