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Botany 2005 Home
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Physiological Section

Gravatt, Dennis [1], Taylor, Josephine [1].

Developmental characteristics of asexual propagules of a Texas succulent plant (Sedum wrightii).

Sedum wrightii is a succulent plant species adapted to survive in the hot, dry environment of a desert rock outcrop. However, sexual reproductive success may be limited to certain years when favorable conditions for seed germination exist. The formation of vegetative propagules, derived from existing detached leaves, may be a more efficient and successful mode of reproduction in a desert environment. Detached leaves of S. wrightii produce plantlets from what appears to be thinned-walled parenchyma and epidermal cells of the petiole, on the basal portion of the adult leaf under callus tissue. Shoot primordia appear first, emerging over lateral regions of the callus tissue by about day five, with the roots emerging from within the callus tissue several days later. Further explanation of the importance of this mode of regeneration is offered.


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1 - Stephen F. Austin State University, Department of Biology, 13003 Sfa Station, Nacogdoches, Texas, 75962-3003, USA

Keywords:
Sedum
asexual reproduction.

Presentation Type: Oral Paper
Session: 7-4
Location: 408/Hilton
Date: Monday, August 15th, 2005
Time: 10:15 AM
Abstract ID:177


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