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Abstract Detail


Water Relations

Al-Jamali, Abbas F. [1].

Mobiles for Studying Plant Adaptations to Water Stress.

The mobile camera was used to study the microscopic adaptations of three drought tolerant plants native to Jordan. Photomicrographs of freehand sections of double stained or unstained leaves of the dicot, oleander, Nerium oleander, show they not only have a thick cuticle but have their stomata hidden in cavities filled with epidermal hairs well away from any dry wind which might cause water loss from the stomata were they exposed on the epidermal surface. The leaves of the monocot, oats, Avena sterilis , which have stomata on both upper and lower leaf surfaces, showed the large, thin walled bulliform cells which, during water stress become flaccid and, permit the leaves to roll up, covering the stomata and thus reducing water loss by transpiration.Leaves of the gymnosperm Aleppo Pine, Pinus halepensis showed sunken stomata, lignified thick walled epidermis and hypodermis cells with a thick cuticle as means of reducing water loss. The mobile camera proved a useful and effective tool for teacher student partnership in learning for both macro and, through the occular lens, microphotography. This is especially the case when no photomicroscope is available and because the pictures can be manipulated & transmitted by computer and multimedia. Results of the above, produced in Plant Science lab sessions for agriculture students at JUST, will be presented.


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1 - Jordan University of Science & Technology, Faculty of Agriculture, Dept. of Plant Production, POBox 3030, Irbid 22110, Irbid, 22110, JORDAN

Keywords:
Mobiles Photomicroscopy
Water stress adaptations
Pinus Nerium Avena
Stomata Bulliform.

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P09025
Abstract ID:2660


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