Cell Transport in Plant Cells

University:
Winston-Salem Forsyth County Schools
Course:
AP Biology
Academic year:

2023
Views:

378

Pages:

2
Author:

Jihan Aviran

Cell Transport in Plants This activity can be found in your digital course. How does high salt concentrations in soil affect plant growth? Record Data and Observations Part 1 1. Why do some croplands suffer from excessive soil salinity? Poor quality water and high amounts of salt Part 2 2. From the Notebook Complete the following table summarizing the effects of salinity on plant growth or paste a copy of the completed table from the notebook in the virtual activity. Electrical Conductivity of the Solution (dS/m) 0 4 8 12 Whole Plant Mass (g) 18g 17g 11g 6g Number of Pods Mass of Beans (g) 17 14 9 8 36g 32g 16g 10g 3. Adding salt to water increases the ability of the saltwater solution to conduct electricity. dS/m is a measure of electrical conductivity. Does a 2 dS/m saltwater solution have more or less salt dissolved than a 10 dS/m saltwater solution? 2 dS/m saltwater solution has less salt than 10 dS/m saltwater solution Part 3 4. Summarize the differences between how the salt-sensitive plant cell and the salt-resistant plant cell behave in the 10% salt solution. Salt sensitive plant shrinks/wilts in the 10% salt solution, but nothing happens to the salt resistant plant Cell Transport in Plants • Copyright © by Savvas Learning Company LLC. All Rights Reserved. Analyze and Conclude 5. From the Notebook One of the symptoms of high salt concentrations in soil is plants that appear dehydrated even when they are receiving adequate water. How can you explain this phenomena using what you observed in the root cells of the salt-sensitive plants? High salt draws out water with osmosis which makes the plants look wilted even if you give them enough water 6. Apply Concepts Suppose a farmer has contacted you for advice on how to avoid and manage problems related to soil salinity. What advice would you provide to the farmer? Either get salt resistant plants or move the beans somewhere less salty 7. Evaluate a Solution Most fields that are irrigated year after year will eventually build up salt in the soil as water regularly evaporates and leaves some salt behind. One way farmers minimize this salt build up is to flood their fields every few years before planting. This flood water leaches out the salt in the soil. What advantages and disadvantages do you see in this approach? Advantages: Removes excess salt and keeps crops healthy Disadvantages: Wastes water, causes soil erosion, and increases runoff pollution. Cell Transport in Plants • Copyright © by Savvas Learning Company LLC. All Rights Reserved.