Mang Noel and Efren are very close friends. They live in a province which main source of income relies on farming. They both own 1 hectare of rice field. Before the implementation of ECQ, Mang Noel's son, Chris, went home for a while. One Saturday morning, Chris with his father went to the field. While roaming around, his father observed something unusual in the rice plant. The plants exhibit yellowing that starts from the leaf tip and extends down to the lower leaf portion. Going back home, they passed by to the field of Mang Efren. Mang Noel mentioned to him the unusual thing in his field. Mang Efren advised him not to worry about and to apply fertilizer. With that, Chris' father thought that it was just an ordinary case and believed that everything will go back to normal after nitrogen application. However, Chris was not convinced so he decided to consult a plant pathologist and eventually confirmed his intuition that the disease is Rice Tungro. Based on Plant Pathology, how should you have convinced Chris' father that it was indeed due to Rice Tungro and not just any nutrient disorder? What are the other characteristics and/or important observations in the field that you need to look at to further support Chris' claim?

Mang Noel and Efren are very close friends. They live in a province which main source of income relies on farming. They both own 1 hectare of rice field. Before the implementation of ECQ, Mang Noel's son, Chris, went home for a while. One Saturday morning, Chris with his father went to the field. While roaming around, his father observed something unusual in the rice plant. The plants exhibit yellowing that starts from the leaf tip and extends down to the lower leaf portion. Going back home, they passed by to the field of Mang Efren. Mang Noel mentioned to him the unusual thing in his field. Mang Efren advised him not to worry about and to apply fertilizer. With that, Chris' father thought that it was just an ordinary case and believed that everything will go back to normal after nitrogen application. However, Chris was not convinced so he decided to consult a plant pathologist and eventually confirmed his intuition that the disease is Rice Tungro. Based on Plant Pathology, how should you have convinced Chris' father that it was indeed due to Rice Tungro and not just any nutrient disorder? What are the other characteristics and/or important observations in the field that you need to look at to further support Chris' claim?

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter28: Plant Nutrition And Transport

Section: Chapter Questions

Problem 3DAA: TCE Uptake by Transgenic Plants Plants used for phytoremediation take up organic pollutants, then...

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TCE Uptake by Transgenic Plants Plants used for phytoremediation take up organic pollutants, then transport the chemicals to plant tissues, where they are stored or broken down. Researchers are now designing transgenic plants with enhanced ability to take up or break down toxins. In 2007, Sharon Doty and her colleagues published the results of their efforts to design plants for phytoremediation of soil and air containing organic solvents. The researchers used Agrobacterium tumefaciens (Section 15.7) to deliver a mammalian gene into poplar plants. The gene encodes cytochrome P450, an enzyme involved in the breakdown of a range of organic molecules, including solvents such as TCE. FIGURE 28.16 shows data from one test on the resulting transgenic plants. FIGURE 28.16 TCE uptake from air by transgenic poplar plants. Indvioual potted plants were kept in separate seated containers with an initial level of TCE (trichloroethytene) around 15.0C0 micrograms per cubic meter of air. Samples of the air m the containers were taken daily and measured for TCE content. Controls included a tree transgenic for a Ti plasmid with no cytochrome P450 in it (vector control), and a bare-root transgenic tree (one that was not planted in soil. 3. On day 6, what was the difference between the TCE content of air around planted transgenic plants and that around vector control plants?
TCE Uptake by Transgenic Plants Plants used for phytoremediation take up organic pollutants, then transport the chemicals to plant tissues, where they are stored or broken down. Researchers are now designing transgenic plants with enhanced ability to take up or break down toxins. In 2007, Sharon Doty and her colleagues published the results of their efforts to design plants for phytoremediation of soil and air containing organic solvents. The researchers used Agrobacterium tumefaciens (Section 15.7) to deliver a mammalian gene into poplar plants. The gene encodes cytochrome P450, an enzyme involved in the breakdown of a range of organic molecules, including solvents such as TCE. FIGURE 28.16 shows data from one test on the resulting transgenic plants. FIGURE 28.16 TCE uptake from air by transgenic poplar plants. Individual potted plants were kept in separate seated containers with an initial level of TCE (trichloroethylene) around 15,000 micrograms per cubic meter of air. Samples of the air in the containers were taken daily and measured for TCE content. Controls included a tree transgenic for a Ti plasmid with no cytochrome P450 in it (vector control), and a bare-root transgenic tree (one that was not planted in soil. 4. Assuming no other experiments were done, what two explanations are there for the results of this experiment? What other control might the researchers have used?
TCE Uptake by Transgenic Plants Plants used for phytoremediation take up organic pollutants, then transport the chemicals to plant tissues, where they are stored or broken down. Researchers are now designing transgenic plants with enhanced ability to take up or break down toxins. In 2007, Sharon Doty and her colleagues published the results of their efforts to design plants for phytoremediation of soil and air containing organic solvents. The researchers used Agrobacterium tumefaciens (Section 15.7) to deliver a mammalian gene into poplar plants. The gene encodes cytochrome P450, an enzyme involved in the breakdown of a range of organic molecules, including solvents such as TCE. FIGURE 28.16 shows data from one test on the resulting transgenic plants. FIGURE 28.16 TCE uptake from air by transgenic poplar plants. Indvioual potted plants were kept in separate seated containers with an initial level of TCE (trichloroethytene) around 15.0C0 micrograms per cubic meter of air. Samples of the air m the containers were taken daily and measured for TCE content. Controls included a tree transgenic for a Ti plasmid with no cytochrome P450 in it (vector control), and a bare-root transgenic tree (one that was not planted in soil. 1. How many transgenic plants did the researchers test?
TCE Uptake by Transgenic Plants Plants used for phytoremediation take up organic pollutants, then transport the chemicals to plant tissues, where they are stored or broken down. Researchers are now designing transgenic plants with enhanced ability to take up or break down toxins. In 2007, Sharon Doty and her colleagues published the results of their efforts to design plants for phytoremediation of soil and air containing organic solvents. The researchers used Agrobacterium tumefaciens (Section 15.7) to deliver a mammalian gene into poplar plants. The gene encodes cytochrome P450, an enzyme involved in the breakdown of a range of organic molecules, including solvents such as TCE. FIGURE 28.16 shows data from one test on the resulting transgenic plants. FIGURE 28.16 TCE uptake from air by transgenic poplar plants. Indvioual potted plants were kept in separate seated containers with an initial level of TCE (trichloroethytene) around 15.0C0 micrograms per cubic meter of air. Samples of the air m the containers were taken daily and measured for TCE content. Controls included a tree transgenic for a Ti plasmid with no cytochrome P450 in it (vector control), and a bare-root transgenic tree (one that was not planted in soil. 2. In which group did the researchers see the slowest rate of TCE uptake? The fastest?
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