Plant Physiology (Biology 327) - Dr. Stephen G. Saupe; College of St. Benedict/ St. John's University; Biology Department; Collegeville, MN 56321; (320) 363 - 2782; (320) 363 - 3202, fax; ssaupe@csbsju.edu |
Starch Prints
In lab we will make "starch prints" using bean and/or geranium leaves. To do so, we will follow the procedures supplied in the references cited below.
Here's an experimental idea from Dr. Walker (University Sheffield, UK): What would happen if we float leaf disks on water +/- sucrose and +/- light overnight and then killing and staining as usual? In which treatment(s) will starch form?
Hypotheses: for each of the following treatments, record your prediction for whether starch will be formed or not.
Treatment | Predicted Starch formation (+ or -) |
disks + water + dark → | |
disks + sucrose + dark → | |
disks + water + light → | |
disks + sucrose + light → |
References:
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Last updated:
01/07/2009 � Copyright by SG
Saupe