[Plant-education] Re: fava bean seed/epidermal peels

David R. Hershey dh321 at excite.com
Fri Feb 3 21:56:34 EST 2006


The orange structures on the Plectranthus (Swedish ivy) leaves are
probably peltate glandular trichomes. The first article below notes
that peltate trichomes in Plectranthus ornatus have "an uncommon but
characteristic orange to brownish colour." Figure 4L has a color photo.

Ascensao, L., Mota, L., and Castro, M. de M. 1999. Glandular trichomes
on the leaves and flowers of Plectranthus ornatus: Morphology,
distribution and histochemistry. Annals of Botany 84: 437-447.
http://aob.oxfordjournals.org/cgi/reprint/84/4/437.pdf

Gersbach, P.V. 2002. The essential oil secretory structures of
Prostanthera ovalifolia (Lamiaceae). Annals of Botany 89: 255-260.
http://aob.oxfordjournals.org/cgi/content/full/89/3/255

Turner, G.W., Gershenzon, J. and Croteau, R.B. 2000. Distribution of
peltate glandular trichomes on developing leaves of peppermint. Plant
Physiol. 124(2): 655-664.
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=59171


Below are some other plants recommended for epidermal peels in student
labs:

1. Commelinia communis:

http://www-saps.plantsci.cam.ac.uk/worksheets/scotland/stomata.htm

2. Zebrina pendula:

http://scidiv.bcc.ctc.edu/rkr/Biology201/labs/pdfs/LeafStructure201.pdf

3. Ficus elastica:

Valenzuela, JL 1998. Ficus epidermal structures: A tool for introducing
leaf anatomy. Amer. Biol. Teacher 60:216-219.

4. Tradescantia:

http://www.biosci.ohio-state.edu/~plantbio/osu_pcmb/courses/pb300_files/lamb_wi06/week_01_Introduction%20to%20the%20Lab.pdf


5. Monstera:

http://www.life.uiuc.edu/ib/423/Lab%20Sheets/Lab_1_Microscopy.pdf


David R. Hershey



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