Plant Care
...ch cup? All of the seeds were planted on 9/12/01. In each cup 5 seeds were planted 2 cm deep. The control plants emerged 9/15 – 9/16, 3 days after planting. The percent emergence of the control plants was 100%. The experimental plants emerged 9/16 – 9/17, 4 days after planting. The percent emergence of the experimental plants was 100%. 2. Include the following table (2 pts): Table 1. Qualitative differences observed between optimal and stress plants. Time after Emergence (weeks) Optimal Plants Stress Plants 0.0 Little green stems with white tips. Little green stems with white tips. 0.5 Short, thicker, green stems with leaves forming. Short, thicker, green stems with leaves forming. 1.0 Stem is green and longer; more leaves forming. Stem is green, reddish near bottom; leaves yellowish. 1.5 Stem is rigid and longer; leaves are getting longer. Stem and leaves wilting; plant lacking greenish color. 2.0 Stem is green but reddish near bottom; leaves longer. Plant completely flattened (birds); appears dead. 2.5 Stem is same and leaves drooping some. Plant dead. 3.0 Stem and leaves are same. Plant dead. 3. (3 pts) Contrast and discuss qualitative changes in optimal vs. stressed plants over time. At the beginning of the experiment both of the plants were very similar. After about a week the experimental stress plant begin to change color from green to a yellowish green. As the control plant continued to grow steadily the experimental plant became more red near the bottom and more yellow in the leaves. The stem and leaves of the experimental plant also began to droop while the control plant remained rigid for the most part. After two weeks the control was in good shape while the experimental plant was nearly dead. After the experimental plant died the control plant basically maintained its size and began to droop minimally. ALL OF ABOVE RESULTS SHOULD BE ON PAGE 2 4. Attach (at end of report) each of the following two figures (each figure should include a title, a label with units for each axis, time on the x-axis, one curve showing average values for each treatment, i.e. optimal and stress with clear indication of which each is, and an arrow to indicate where stress began on curve for stress plants): a) (5 pts) Time after emergence (weeks) vs. plant height (cm) OR Time after emergence (weeks) vs. number of side branches (only include if numerous side branches developed) b) (5 pts) Time after emergence (weeks) vs. number of leaves 5. (3 pts) Did height of optimal vs. stressed plants differ over time? If so, how? OR Did number of side branches on optimal vs. stressed plants differ over time? If so, how? The height of the optimal plants differed from the height of the stressed plants over time. After the stress was initiated the height of the control plant continued to grow whereas the stress plant growth slowed greatly. The stress plants grew very minimally in their second week of growth and soon after that died. However, the control plants went through a strong growth period during their second week of growth. The stress clearly had an effect on the experimental plants. 6. (3 pts) Did number of leaves on optimal vs. stressed plants differ over time? If so, how? The number of leaves on the optimal plants differed from the number of leaves on the stressed plants over time. The stress plants had more leaves than the control plants when the stress was initiated. The stress plants had less leaves than the control plants after less than a week of the stress being applied. The stress plants continued to lose leaves until it died. However, the control plants continued to grow more leaves. The stress clearly had an effect on the experimental plants. 7. (1 pt) Did number of flowers on optimal vs. stressed plants differ over time? If so, how? Does not apply for the species begin looked at. QUESTIONS 5-7 SHOULD BE INCLUDED ON PAGE 3 Conclusions: 1. (3 pts) What was the overall effect of your stress on plant growth? The overall effect of the stress, over watering a plant, was evi...