Abstract Detail

Development and Structure

Seago, James L [1], Mohamed, Kamal [2], Leasure, Breanna [2], Bonacorsi, Nikole [3].

Enigmatic Anatomy in Lycopods.

As presented by James Seago and Kamal Mohamed, we report that members of the Lycopodiaceae and Selaginellaceae have some unique anatomical and histochemical traits. Among the Lycopodioideae of the Lycopodiaceae, the innermost region of the cortex in stems and roots often has variously modified cell walls which we term an endodermoid. In most stems and roots of the Huperzioideae, the cell walls of this innermost region of the cortex are better defined as an endodermis because cells with Casparian bands are evident in a ring around the stele of stems and vascular cylinder of roots. Lycopodioideae adventitious roots grow perpendicularly through the cortex to have epidermal emergence from the stems, while Huperxioideae roots grow vertically doiwnward through the stem cortex to have cortical emergence. In the Selaginellaceae, neither a distinct endodermis nor endodermoid is apparent in stems under UV epifluorescence, but a unique endodermoid wall layer surrounds the stele or each meristele under 488nm laser confocal in most species, except Selaginella lepidophylla. An endodermis with Casparian bands and even suberin lamellae in some cells is present in rhizophores and roots.

1 - PO Box 316, Minetto, NY, 13115, United States
2 - SUNY at Oswego, Oswego, NY, 13126, USA
3 - Manlius-Pebble Hill School, Syracuse, NY, USA

Keywords:
lycopods anatomy.

Presentation Type: Oral Paper
Number: DS5001
Abstract ID:558
Candidate for Awards:None