Developmental and Structural Section
Seago, James .
Adaptations of the aquatic plant, Rorippa officinale, to its stream habitat in summer and winter.
The aquatic plant, Rorippa officinale, is well adapted to its habitat in a small stream where it flourishes in spring, summer, and fall, and remains anchored and vital even in the winter conditions of a snow belt in Oswego County, New York. The extensively branched plants have adventitious roots that are produced at most nodes, both in and above the flowing water; the aerial roots elongate very little. Roots and stems generally have characteristic brassicaceous structures. Submersed adventitious roots have an aerenchymatous cortex with a simple endodermis. Submersed parts of stems have a cell layer surrounding the central core of vascular budnles, ring of fibers, and pith; this layer is endodermal-like and more prominent in submersed stems than in aerial stems. There are larger air spaces and less chlorophyllous tissue in submersed stems than in aerial stems.
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1 - State University of New York, Biological Sciences, Oswego, NY, 13126, USA
Presentation Type: Oral Paper:Papers for Sections
Date: Monday, July 28th, 2008
Time: 11:00 AM