Lect14S2011 - Midterm Exam Reminder Midterm First Exam:...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Midterm Exam Reminder Midterm Exam Reminder First Exam: February 14, 2011. Bring # 2 pencil to take exam. Bring student ID Enter your Student Identification Number, e.g. 12345678, no hyphen, no space!
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Instructions for Scan Trons Instructions for Scan Trons DO NOT USE YOUR Social Security DO NOT USE YOUR Social Security Number! Number! Start number from left margin. Be sure to fill in “bubbles”, i.e.  Write your Name, last name first, first name last and fill in “bubbles”. Your score may not be posted if the above is not correct.
Background image of page 2
Environmental Responses and Plant Development Environmental Responses and Plant Development Photoperiodism and flowering Photoperiodism and flowering
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Trophic Responses Trophic Responses Tropisms : Growth responses that results in curvature of whole plant organ towards or away from stimulus Controlled by various environmental cues.
Background image of page 4
Gravitropism Gravitropism Gravitropism : Growth response of plant to gravity. Example of gravitropism: If a plant is placed on its side, the root and stem will make adjustments. Stem will grow upward while root will grow downward .
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Demonstration of Gravitropism Demonstration of Gravitropism Corn seedling oriented with root pointing downward and coleoptile upward: Corn Seedling Corn Seedling Root Root Coleo Coleo ptile ptile
Background image of page 6
Demonstration of Gravitropism Demonstration of Gravitropism Seedling rotated 90°: Auxin transported to lower side of coleoptile makes it grow upward. Auxin also transported to lower side of root, at high concentration makes it grow downward.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Demonstration of Gravitropism Demonstration of Gravitropism Seedling after 20 hours: Negative gravitropism : Coleoptile growth curves upward . Positive gravitropism : Root growth curves downward .
Background image of page 8
Demonstration of Gravitropism Demonstration of Gravitropism Statoliths “tells” plant when change in orientation occurs: Statoliths, far right, show change in orientation. Root tips, near right, show curvature downward (bottom)
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Thigmotropism Thigmotropism Thigmotropism : Growth response of plants to touch. Examples:
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 36

Lect14S2011 - Midterm Exam Reminder Midterm First Exam:...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online