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Abstract Detail


Das, Aayudh [1].

The role of stomatal trait evolution in Pooideae (Poaceae) stress tolerance.

The success of grasses (Poaceae) within primarily open, and often arid, habitats has been attributed to both the early acquisition of, and/or variation within, several traits that affect performance. These include the evolution of tap roots, C4 photosynthesis, and changes in the size, shape, density, and behavior of pores (stomata) that facilitate both gas exchange and water lost. In the large temperate BEP subfamily Pooideae, which includes key crops such as wheat and barley, it is hypothesized that high average drought tolerance has facilitated increased freezing tolerance, or vice versa, and that both adaptations might have been partly facilitated by evolution of stomatal traits. However, the nature of Pooideae stomatal traits (e.g. constitutive vs. plastic), their correlation with phylogeny and/or contemporary niche space, and their relationship with gas exchange efficiency is not well understood. To address this knowledge gap, we are analyzing the relationship between stomatal morphology, leaf gas exchange, and accession-based niche variables across different Pooideae species and abiotic treatments in a phylogenetic framework. This study reveals the importance of ecological adaptation and phylogenetic history on plant responses to environmental stress, thus allowing better prediction of how this important subfamily will respond to current and future climate change.

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1 - University Of Veromnt, Plant Biology, 63 Carrigan Drive, 111 Jeffords Hall, Burlington, VT, 05405, United States

Abiotic Stress

Presentation Type: Poster
Session: P, Ecology Posters
Location: Arizona Ballroom/Starr Pass
Date: Monday, July 29th, 2019
Time: 5:30 PM This poster will be presented at 5:30 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PEC001
Abstract ID:100
Candidate for Awards:None

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