Pearson eText Biology: Science for Life -- Instant Access (Pearson+)
6th Edition
ISBN: 9780135214084
Author: Colleen Belk, Virginia 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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Students have asked these similar questions
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 above
Which of these are plant hormones?
Starch
Nicotine
Palmitic acid
Ethylene
You 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:
O a. Apply ethylene to the apples to increase ripening.
O b. Apply ethylene to slow ripening and increase chlorophyll levels.
O C. Apply auxin to increase parthenocarpy
O d. Apply gibberellins to increase fruit size.
O e. Apply auxins to decrease apical dominance and increase water intake.
Chapter 26 Solutions
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- discuss five (5) plant hormonesarrow_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. 3. Which one of the chemicals tested is most likely produced by tobacco plants in a nonspecific response to predation?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
- Three applications of plant hormones in agriculture.arrow_forwardDescribe 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_forward
- Plant Hormonesarrow_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_forwardHormones and signal pathways Complete the following paragraph to describe signal transduction as it occurs within plants. Choices may be used more than once or not at all. Chemical signals called play an important role in a plant's ability to respond to a stimulus. These signals bind to receptors, the first step in a cellular response called a may be located in the plasma membrane, the cytoplasm, the nucleus, or the endoplasmic reticulum. The series of relay proteins or enzymes activated by the hormone binding the receptor make up the Some responses are immediate, while others require a like Ca*, to initiate a cellular response. The result of the transduction pathway is a which is often the transcription of specific genes, resulting in some measurable change. hormones reflex arc signal transduction pathway Signal transducers second messenger response Receptor proteins first messengerarrow_forward
- Can you answer this questionarrow_forwardCattle in industrial dairy farms are typically given rBST, an animal hormone that increases a cow’s milk production. There is concern that such hormones may have unforeseen effects on milik-drinking humans. Why is there much less concern about plant hormones in the plant foods we eat?arrow_forwardIf a farmer wanted less tightly packed clusters of grapes, he would most likely spray the immature bunches with which of the following hormones? cytokinins gibberellins auxin abscisic acidarrow_forward
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