Abstract Detail

Teaching Section

Liaghat, Soroush [1], Mehroke, Jarnail [1], Singh, Santokh [1].

Hormonal regulation of hypocotyl and cell growth in lettuce (Lactuca sativa) seedlings: a new research project for undergraduate plant physiology students.

We have developed a new, simple, rapid and inexpensive research project on lettuce (Lactuca sativa) hypocotyl cell growth for third year undergraduate plant physiology students. In this study, the effect of different plant growth hormones (gibberellic acid, auxins) and inhibitors (colchicine, abscisic acid) were investigated to examine the relationship between the endogenous levels and exogenous application of hormones on lettuce hypocotyl length and cell size. Further the interaction of different hormones at a variety of concentrations was studied in order to determine the optimal concentrations of hormones in cell and hypocotyl growth. Gibberellic acid (GA₃) stimulated whereas auxin, colchicine and abscisic acid inhibited the lettuce hypocotyl growth. Students can study the effects of both individual plant hormones at different concentrations as well as their interactions with one another. In addition, students can examine the role of environmental factors on lettuce hypocotyl cell growth. The whole project can be completed within one to two weeks. The physiological roles and mechanisms of hormone action in relation to cell growth will be discussed.

Broader Impacts:

1 - University of British Columbia, Botany, #3529-6270 University Boulevard, Vancouver, BC, V6T 1Z4, Canada

Keywords:
Cell growth
Hypocotyl
Lettuce
Plant hormone.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Battelle South/Convention Center
Date: Monday, July 9th, 2012
Time: 5:30 PM
Number: P008
Abstract ID:1063