DOI: 10.5061/dryad.jn67k8n
title: Data from: The monocotyledonous underground: global climatic and phylogenetic patterns of geophyte diversity

description: Geophytes—plants typically with a bulb, corm, tuber or rhizome—are
 economically and evolutionarily important; however, the drivers of their
 morphological diversity remain unknown. Using a comprehensive phylogeny of
 monocots, we test for correlations between climate and growth form to
 better understand why we observe such a diversity of geophyte underground
 traits. Understanding the evolutionary factors promoting independent
 origins of these organs will lend insights into how plants adapt to
 environmental hardships. Using a phylogeny incorporated with global
 occurrence and climate data for the monocots, we investigated whether
 climatic patterns could explain differences between geophytes and
 non-geophytes, as well as differences among bulbous, cormous, tuberous,
 rhizomatous, and non-geophytic taxa. We used phylogenetically-informed
 ANOVAs, MANOVAs and PCAs to test differences in climatic variables between
 growth forms. Geophytes inhabit cooler, drier and thermally variable
 climates compared to non-geophytes. Although some underground traits
 (i.e., bulb, corm, and tuber) appear to inhabit particular niches, our
 data has limited evidence for an overall role of climate in the evolution
 of these traits. However, temperature may be a driving force in rhizome
 evolution, as well as the evolution of taxa considered here as
 non-geophytes. Our results suggest that temperature should be more
 strongly considered as a factor promoting the evolution of belowground bud
 placement, specifically as it relates to rhizomatous taxa. Bulbous,
 cormous and tuberous taxa need closer examination of other mechanisms,
 such as anatomical constraints or genetic controls, in order to begin to
 understand the causes behind the evolution of their underground
 morphology. In compliance with data protection regulations, you may
 request that we remove your personal registration details at any time.
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description: Monocot
 phylogenyPhylogenetic tree used
 for statistical analyses. Tips are taxa which had sufficient climate data
 (i.e. more than 3 georeferenced points). The PHLAWD pipeline was used for
 GenBank query and sequence alignment; RAxML was used for tree building,
 treePL was used for the dating analysis.monocot_climate_phylogeny.treRaw climate dataRaw climatic data for all 19 Bioclim variables for all taxa with more than 3 georeferenced data points.raw_monocot_climate_data.csvMean values of climate dataMean values for each Bioclim variable used in subsequent statistical analyses for each taxon as well as their character coding (bulb = 0, corm =1, rhizome = 2, tuber = 3, non-geophyte = 4).mean_monocot_climate_data.csvMultiple sequence alignment file for monocotsSupermatrix alingment file for taxa recovered from the PHLAWD pipeline then subseqently used for input into RAxML.monocots.fastaPartition file used in RAxMLThe gene partitions found in the multiple sequence alignment.monocot_raxml_partition.txt