Abstract Detail

Systematics Section

Isa, Siti Fatimah [1], Tripp, Erin [1], Mcdade, Lucinda [2].

Comparative anatomy and morphology of the genus Satanocrater (Acanthaceae).

The aromatic and ethnobotanically important genus Satanocrater (Acanthaceae) from arid northern Africa has been little studied. Here, we examine morphology,phylogeny, anatomy, and ecology of all four species in the genus. All four share features that suggest adaptations to xeric environments (e.g., the possession of a thick-walled epidermis, thick waxy cuticle, abundant glandular trichomes, and/ or dense, gland-like scales). Two of the species were also observed to have sunken stomata while massive trichomes and/ or glands on the other two species obscured the stomatal structure. Interestingly, plants of S.paradoxus possess bundle sheath cells indicative of Kranz anatomy. If confirmed, Satanocrater will represent the second known occurrence of C4 photosynthesis in the family. This study is the first to document pollen and seed morphology in the genus; traits pertaining to both support its placement in the Ruellieae lineage. Within Ruellieae, pollen morphology of Satanocrater is somewhat transitional between two major lineages, and phylogenetic data are consistent with this "transitional" hypothesis.

Broader Impacts:

1 - Rancho Santa Ana Botanic Garden, 1500 N College Ave, Claremont, CA, 91711, USA
2 - Rancho Santa Ana Botanic Garden, Department Of Botany, 1500 N. College Avenue, Claremont, CA, 91711, USA

Keywords:
Africa
Acanthaceae
Ruellieae
Satanocrater
xeric adaptation
C4 photosynthesis
Kranz anatomy.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Khorassan Ballroom/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 5:30 PM
Number: PSY033
Abstract ID:678