What s the significance of this naing Imai-plant gro other words, why dont plants have endocrine like organs? 2. Some mutant corn plants start seed germination while the kernels are still on the cob, a condition known as 'vivipary'. Researchers found that the mutants can't regulate abscisic acid (ABA) and can be of two types: one that can overcome this condition by exogenous application of ABA and another type that cannot. Explain why ABA absence would promote vivipary and how the two types could be explained in terms of gene expression? 3. In 2010, NASA sent Arabidopsis seeds to the International Space station and grew them under zero gravity conditions. To their surprise, the plants germinated and developed shoot androot systems growing in opposite directions and the root showed patterns of normal root growth behavior. What might this suggest about gravity's role in plant seed germination and development and how do

What s the significance of this naing Imai-plant gro other words, why dont plants have endocrine like organs? 2. Some mutant corn plants start seed germination while the kernels are still on the cob, a condition known as 'vivipary'. Researchers found that the mutants can't regulate abscisic acid (ABA) and can be of two types: one that can overcome this condition by exogenous application of ABA and another type that cannot. Explain why ABA absence would promote vivipary and how the two types could be explained in terms of gene expression? 3. In 2010, NASA sent Arabidopsis seeds to the International Space station and grew them under zero gravity conditions. To their surprise, the plants germinated and developed shoot androot systems growing in opposite directions and the root showed patterns of normal root growth behavior. What might this suggest about gravity's role in plant seed germination and development and how do

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter34: Transport In Plants

Section: Chapter Questions

Problem 5TYK

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Can you answer this question, all of the parts please. A. Please explain the phenomenon of apical dominance in plant growth. B. Which plant hormone(s) involved in apical dominance?
Match the hormone with the observation. ____ ethylene a. Your cabbage plants bolt (they form elongated flowering stalks) ____ cytokinin b. The potted plant in your room is leaning toward the window ____ auxin c. The last of your apples is getting really mushy ____ gibberellin. d. The seeds of your roommate's marijuana plant do not germinate no matter what he does to them. ____ ABA e. Lateral buds are sprouting. Your l ____ nitric oxide. f. Your lettuce plants develop brown spots on their leaves.
Phytochrome is a plant pigment protein that mediates plant infection promotes plant growth mediates morphological changes in response to red and far-red light inhibits plant growth
Which is the correct pairing of a plant hormone and its function? salicylic acid: triggers synthesis of general defense proteins brassinosteroids: promote responses to environmental stress cytokinins: stimulate stomata to close in water-stressed plants gibberellins: slow seed germination ethylene: promotes formation of lateral roots
1. Plant Hormone signal transduction is an exciting field and the mode of signaling for various hormones in the cellular context have been elucidated. Compare and contrast the plant hormone Auxin and ethylene signal transductions mechanisms. (Hint. Begin at the Receptor level)
4. Define transpiration and give some of its significance 5. How do root hairs absorb water? 6. A plant hormone was first discovered in Japan when rice plants were suffering from Bakanae disease caused by Gibberella fujikoroi. Based on this information answer the following questions: a. Identify the hormone involved in this process. b. Which property of this hormone causes the disease? 7. Name the gaseous plant hormone and describe three different actions of this hormone in plants. 8. Explain how the auxin:cytokinin ratio affects plant growth.
(Plant Physiology) Electrophysiological measurements were carried out on bean guard cells to measure outwards K+ currents and how they are modified by various factors. Assume that the K+ currents shown here are proportional to the net changes in the intracellular K+ concentration. Currents (I) across the plasma membrane at different voltages (V) were determined after each step of four different experiments. Experiment 1Step 1: Incubated in washing buffer. Step 2: Exposed to exogenous nitric oxide (NO). Step 3: Washed in washing buffer Experiment 2Step 1: Injected with buffer to set cytoplasmic pH to 7.4. Step 2: Exposed to exogenous nitric oxide (NO). Step 3: Washed in washing buffer. Experiment 3 Step 1: Incubated in washing buffer. Step 2: Exposed to exogenous nitric oxide (NO). Step 3: Exposed to BAL, a reducing agent that is known to reduce disulphide bridges in proteins. Step 4: Exposed to exogenous nitric oxide (NO). Experiment 4 Step 1: Incubated in washing buffer. Step 2:…
2. Certain mutations in thale cress cause excess auxin production. Predict the impact of these mutations on the plants’ phenotype.
18.It stimulates biochemical activities that cause observable physiological responses by organisms. a.Auxin b.Hormone c.Insulin d.Gibberelin 19.Which natural methods of asexual reproduction is exhibited by ginger, fern, iris and sugarcane? a.Bulb b.Runner c.Corm d.Rhizome 24.Unlike animal hormones, plant hormones do NOT have definite target areas. a.True b.False Plant senescence is the process of aging in plants. Which plant hormone delays senescence? a. Cytokinin b. Gibberelin c. Jasmonic acid d. Brassinosteroid The following are functions of the stomata except ____________. a. close or open pores to keep the moisture content developed b. open and close the pores in the leaves for an exchange of gases c. allow the plant to take in carbon dioxide and give out oxygen for photosynthesis d. convey water and dissolved minerals from the roots to the rest of the plant
You are growing tomatoes and your plants are healthy and nearly one metre tall. Youworry that they might get blown over by the wind, so you decide to lend them extrasupport with a wire frame. You accidently break the growing tip off the top of one ofthe plants. After a few weeks, you notice that instead of growing tall like the otherplants, the plant with the broken tip has grown denser with thicker lateral shootsthan the other plants. Question: Explain what signal transduction pathway has been impacted by the removalof the growing tip of this tomato plant and contrast this with what ishappening in the normal growing tomato plants (10 facts).
Plant Physiology In the amazon rainforest, what is needed (1 only) to induce germination faster? Why?
Brassinazole is a drug that inhibits brassinosteroid biosynthesis. Predict what effect brassinazole would have on a plant.