Publication No. 10329
Allelopathy Study Kit
Materials Included In Kit
Lettuce seeds, ~ 600
Additional Materials Required
Plant materials (or any other materials) used during laboratory investigations should never be consumed. Seeds are often treated with mold inhibitors and other chemicals. Remind students to wash hands thoroughly with soap and water before leaving the laboratory.
Seedlings may be disposed of in the trash according to Flinn Suggested Disposal Method #26a.
Correlation to Next Generation Science Standards (NGSS)†
Science & Engineering PracticesConstructing explanations and designing solutions
Engaging in argument from evidence
Disciplinary Core IdeasMS-LS1.B: Growth and Development of Organisms
HS-LS1.B: Growth and Development of Organisms
Crosscutting ConceptsCause and effect
MS-LS1-4. Use argument based on empirical evidence and scientific reasoning to support an explanation for how characteristic animal behaviors and specialized plant structures affect the probability of successful reproduction of animals and plants respectively
Answers to Questions
Have you ever noticed that plants do not seem to grow under pine trees? What is the reason for this? Can plants defend their own space and prevent others from growing in their area?
Allelopathy is a process by which certain plants release chemicals which inhibit the growth of other plants. One of the best known examples is the black walnut, Juglans nigra, which contains a chemical called juglone, mostly in its roots, which is toxic to many species of plants. Tomatoes and many other vegetables suffer “walnut wilt” and die as soon as their roots come in contact with the roots of a walnut tree. Walnut chemicals cause allergic reactions in some people and may be toxic to some animals.
Plant materials used during laboratory work should never be consumed. Seeds are often treated with mold inhibitors and other chemicals. Wash hands thoroughly with soap and water after handling seeds and other plant material.
Student Worksheet PDF