Create your own conference schedule! Click here for full instructions

Abstract Detail

Geology and Plant Life: the growing legacy of Arthur Kruckeberg

Pepper, Alan [1], Hawkins, Angela [2], Garza, Elyssa [3], Ivalu, Cacho [4], Strauss, Sharon [5].

Streptanthus (Brassicaceae) as a model for the study of serpentine adaptation and endemism.

Kruckeberg (1985) suggested that plants in the genus Streptanthus (Brassicaceae) might serve as effective models for the study of serpentine tolerance and endemism, as they "display a full range of step toward absolute restriction to serpentine—from mere (ecotypic) highly singular taxa with little resemblance to living antecedents." At the time, Kruckeberg also observed "a great hiatus in our understanding of the genecological/ecophysiologcal traits associated with...serpentine plants."
Here we describe the insights on the evolution of serpentine tolerance and endemism gained from recent genetic, molecular and genomic studies of the serpentine endemic Caulanthus (Streptanthus) amplexicaulis var barbarae in comparison with its serpentine intolerant conspecific C. amplexicaulis var amplexicaulis. These findings point to roles for widespread duplication of individual genes and reticulate evolution (introgression) in the acquisition of serpentine tolerance. We also propose a genetic model to explain the widely observed endemism on serpentine and other unusual edaphic substrates.

Log in to add this item to your schedule

1 - Department Of Biology, Texas A&M University, TAMUS 3258, College Station, TX, 77843, USA, 979-845-2518
2 -
3 - Texas A & M University, Department Of Biology, Tamus 3258, College Station, TX, 77843, USA
4 - Instituto de Biología, UNAM, Departamento de Botánica A-204, 3er Circuito de Ciudad Universitaria, Delegación Coyoacán, Mexico, DF, 04510, Mexico
5 - University of California, Davis, Department of Evolution and Ecology, 2320 Storer Hall, One Shields Avenue, Davis, CA, 95616, USA


Presentation Type: Symposium Presentation
Session: SY4, Geology and plant life: the growing legacy of Arthur Kruckeberg
Location: Fort Worth Ballroom 5/Omni Hotel
Date: Tuesday, June 27th, 2017
Time: 3:45 PM
Number: SY4007
Abstract ID:402
Candidate for Awards:None

Copyright © 2000-2017, Botanical Society of America. All rights reserved