Abstract Detail



Ecophysiology

Goolsby, Eric [1], Mason, Chase [2].

Rethinking metal hyperaccumulation and metal tolerance as evolutionarily and physiologically distinct traits: a comparison with salt tolerance and uptake in wild sunflowers (Helianthus).

Several hundred plants are capable of accumulating extremely high concentrations of metals, a phenomenon known as metal hyperaccumulation. Traditionally, hyperaccumulation has been framed in a so-called ‘ecological’ perspective which conflates metal tolerance and metal accumulation as a single plant syndrome. Here we evaluate the distinct evolutionary trajectories of metal tolerance and accumulation in wild sunflowers using a variety of phylogenetic comparative approaches. We further assess the feasibility of various adaptive hypotheses for metal hyperaccumulation, with an emphasis on associations between metal tolerance and accumulation with sodium tolerance and accumulation in wild sunflowers.


1 - University of Central Florida, Department of Biology, 4110 Libra Dr, Orlando, FL, 32816, USA
2 - University of Central Florida, Department of Biology, 4110 Libra Drive, Orlando, FL, 32816, US

Keywords:
metal hyperaccumulation
salt tolerance
phylogenetic comparative methods
Helianthus
sunflowers.

Presentation Type: Oral Paper
Number: 0003
Abstract ID:907
Candidate for Awards:None


Copyright © 2000-2019, Botanical Society of America. All rights reserved