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Combining Data from DNA Sequences and Morphology for a Phylogeny of Moringaceae (Brassicales)
- M. Olson
- 24 January 2009
Parsimony analyses of morphological data and DNA sequences from a low-copy nuclear region, a chloroplast region, and a tandemly-repeated nuclear region present in high copy number (ITS) found relationships within Moringa to be largely congruent with a previous study of wood anatomy.
Insights into the historical construction of species-rich Mesoamerican seasonally dry tropical forests: the diversification of Bursera (Burseraceae, Sapindales).
The diversification of Bursera suggests that Mesoamerican SDTF richness derives from high speciation from the Miocene onwards uncoupled from habitat shifts, during a period of enhanced aridity resulting mainly from global cooling and regional rain shadows.
Coordinated evolution of leaf and stem economics in tropical dry forest trees.
- Rodrigo Méndez-Alonzo, H. Paz, Rossana Cruz Zuluaga, Julieta A. Rosell, M. Olson
- Environmental ScienceEcology
- 1 November 2012
Across biomes, rather than a fundamental trade-off underlying a single axis of trait covariation, the relationship between leaf and stem economics is likely to occupy a wide space in which multiple combinations are possible.
Plant height and hydraulic vulnerability to drought and cold
- M. Olson, D. Soriano, Rodrigo Méndez-Alonzo
- Environmental ScienceProceedings of the National Academy of Sciences
- 2 July 2018
It is shown that taller plants have predictably wider water-conducting conduits, and that wider conduits within species are more vulnerable to conduction-blocking embolisms, suggesting that tall plants in formerly moist areas die because their wide conduits are excessively vulnerable under novel drought conditions.
Universal hydraulics of the flowering plants: vessel diameter scales with stem length across angiosperm lineages, habits and climates.
Data from 257 species shows that vessels widen as predicted with distance from the stem apex across angiosperm orders, habits and habitats, leading to testable predictions regarding evolutionary strategies allowing plants to minimise carbon costs per unit leaf area even as height increases.
Vessel diameter-stem diameter scaling across woody angiosperms and the ecological causes of xylem vessel diameter variation.
Predictable relationships between vessel diameter and stem diameter mirrored predictable relationships between stem length and diameter across self-supporting species, suggesting that taper in relation to conductive path length gives rise to the vessel diameter-stem diameter relationship.
TRY plant trait database – enhanced coverage and open access
The extent of the trait data compiled in TRY is evaluated and emerging patterns of data coverage and representativeness are analyzed to conclude that reducing data gaps and biases in the TRY database remains a key challenge and requires a coordinated approach to data mobilization and trait measurements.
Leaf Protein and Mineral Concentrations across the “Miracle Tree” Genus Moringa
- M. Olson, Renuka P. Sankaran, J. Fahey, M. Grusak, D. Odee, W. Nouman
- Biology, MedicinePloS one
- 26 July 2016
The moringa tree Moringa oleifera is a fast-growing, drought-resistant tree cultivated across the lowland dry tropics worldwide for its nutritious leaves. Despite its nutritious reputation, there has…
Stem and leaf anatomy of the arborescent Cucurbitaceae Dendrosicyos socotrana with comments on the evolution of pachycauls from lianas
- M. Olson
- Environmental SciencePlant Systematics and Evolution
- 31 July 2003
It is suggested that lianas have numerous features that are readily co-opted in the evolution of pachycaul trees and that the evolution that has happened repeatedly in the core eudicots.
Stem and root anatomical correlations with life form diversity, ecology, and systematics in Moringa (Moringaceae)
Wood anatomy provides characters that are of potential phylogenetic utility at a variety of levels of relationship and the most likely sister taxon to Moringa is Cylicomorpha (Caricaceae).