Abstract Detail

Systematics

Humphreys, Emily [1], Edwards, Caroline [2], Last, Noah [3], Olivieri, Julia [4], Brunner, Anna [5], Mikenas, Jessica [6], Henzler-Lhasawa, Chamden [3], Douglas, Norman [7], Flores, Hilda [8], Ochoterena, Helga [9], Hernandez Ledezma, Patricia [10], Nosratinia, Sonia [11], LoPresti, Eric [12], Weber, Marjorie [13], Thulin, Mats [14], Perersen, Gitte [15], Friis, Ib [16], Smith, Stephen [17], Moore, Michael [18].

If You’ve got a Tree, Climate: Reconstructing the History of Evolution and Climate Preference in the Four O’Clock Tribe (Nyctaginaceae tribe Nyctagineae).

Nyctaginaceae tribe Nyctagineae comprises almost 200 species, or about half of the species diversity in the family. Members of the tribe range in habit from shrubs to small trees and have a particular aptitude for growing on the unusual substrate gypsum (CaSO4·2H2O). Though the tribe has a clear center of diversity in the arid and semiarid regions of North America, members are found on every continent except Antarctica, growing everywhere from Montana to the Andes to Madagascar to the Tebetin Plateau. In order to better understand the factors underlying the pace of evolution in the tribe, solidify our understanding of the relationships between taxa, and quantify the tribe’s propensity to specialize for growing on gypsum, we have constructed a species level phylogeny for Nyctagineae using DNA sequence data from one nuclear (ITS) and two chloroplast (ndhF/rpl32 and rpl32/trnL) regions. With over a hundred and fifty species represented, the resolution of the tree allows us to reconstruct the history of climate preference in the tribe more precisely than previously possible. Using data from field collections and online databases, we are working to reconstruct niche evolution within Nyctagineae. These models will allow us to test the hypothesis that Nyctagineae originated in a subtropical, semi-arid climate and members of the tribe have since radiated into drier, cooler climates. We will also test the hypothesis that Nytagineae exhibits more niche diversity with regard to temperature than rainfall. More generally, we hope comparing our data with the history of Earth’s shifting climate will give us further insight into how this group of plants evolved in the face of changing climate conditions during the past 20 million years.

1 - Oberlin College, Department of Biology, 119 Woodland St., Oberlin, OH, 44074, USA
2 - Michigan State University, Department of Plant Biology, 612 Wilson Rd., East Lansing, MI, 48824, USA
3 - Oberlin College, 119 Woodland St., Oberlin, OH, 44074, United States
4 - Stanford University, Institute for Computational and Mathematical Engineering, 475 Via Ortega, Stanford, CA, 94305, USA
5 - Healing our Waters - Great Lakes Coalition, 213 West Liberty St., Suit 200, Ann Arbor, MI, 48104, USA
6 - USGS Canyonlands Research Station, Southwest Biological Science Center, 2290 S West Resource Blvd, Moab, UT, 84532, USA
7 - University Of Florida, Biology, PO Box 118525, Gainesville, FL, 32611, United States
8 - Instituto de Biologia UNAM, Botanica, Apto. Postal 70-367, Coyoacan, DF, 04510, Mexico
9 - Instituto De Biolog�a, UNAM, Botanica, Depto Bot�nica-Apdo.Postal 70-367, Coyoacan, Mexico DF, 04510, Mexico
10 - INECOL, Centro Regional del Bajio, Pa�tzcuaro, Michoaca�n, Mexico
11 - University of California, Berkeley, Department of Integrative Biology, 3040 Valley Life Sciences Building #3140, Berkeley, 97720, CA, USA
12 - Michigan State University, Department of Biology, 612 Wilson Rd., East Lansing, MI, 48824, United States
13 - Michigan State University, Plant Biology Laboratories, 612 Wilson Road, Rm 166, East Lansing, MI, 48824, United States
14 - Uppsala University, Department of Organismal Biology, Norbyv. 18D, 75236, Uppsala, Sweden
15 - Stockholm University, Department of Ecology, Environment and Plant Sciences (DEEP), 106 91 , Stockholm, Sweden
16 - University of Copenhagen, Natural History Museum of Denmark, Oster Farimagsgade 2b, Copenhagen, 1353, Denmark
17 - 1105 N University Ave, Ann Arbor, MI, 48109, United States
18 - Oberlin College, Department Of Biology, 119 Woodland St., Science Center K111, Oberlin, OH, 44074, United States

Keywords:
Nyctaginaceae
Gypsum
Mirabilis
Commicarpus
Boerhavia
Acleisanthes
Abronia
phylogeny
climate
evolution.

Presentation Type: Poster
Session: P, Systematics Posters
Location: Virtual/Virtual
Date: Thursday, July 30th, 2020
Time: 5:00 PM Time and date to be determined
Number: PSY009
Abstract ID:296
Candidate for Awards:None