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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.
Convergent Vessel Diameter–Stem Diameter Scaling across Five Clades of New and Old World Eudicots from Desert to Rain Forest
- M. Olson, Julieta A. Rosell, J. Grant
- Biology, Environmental ScienceInternational Journal of Plant Sciences
- 13 August 2013
The results appear congruent with the notion that selection favoring cavitation resistance via narrow vessels should lead to shorter statures independently of ancestry or habitat, and with models suggesting that natural selection should maximize vessel conductivity while minimizing cavitation risk via vessel taper in the context of conductive path length.
A PHYLOGENETIC ANALYSIS OF THE CASCABELA–THEVETIA SPECIES COMPLEX (PLUMERIEAE, APOCYNACEAE) BASED ON MORPHOLOGY1
The topology supports the monophyly of the Cascabela–Thevetia species complex, but it is not conclusive to whether Casc Isabela should be recognized as a genus or as a subgenus of Thevetia.
The diversity and evolution of pollination systems in large plant clades: Apocynaceae as a case study
- J. Ollerton, S. Liede‐Schumann, Z. Quirino
- Environmental Science, BiologyAnnals of botany
- 7 August 2018
This is the most extensive analysis of its type so far attempted and gives important insights into the diversity and evolution of pollination systems in large clades of angiosperms.
Population genetic analysis and bioclimatic modeling in Agave striata in the Chihuahuan Desert indicate higher genetic variation and lower differentiation in drier and more variable environments.
- L. Trejo, Leonardo O. Alvarado-Cárdenas, Enrique Scheinvar, L. Eguiarte
- Biology, Environmental ScienceAmerican journal of botany
- 1 June 2016
The detected association between genetic variation and environment variables indicates that climatic variables are playing an important role in the differentiation of A. striata.
Molecular phylogenetics and morphology of Beaucarnea (Ruscaceae) as distinct from Nolina, and the submersion of Calibanus into Beaucarnea
It is shown that Beaucarnea is a well-supported entity, distinct from Nolina on molecular and morphological grounds, and the absence of reciprocal monophyly between Beau carnea and Calibanus is demonstrated.
New additions of Spigelia (Loganiaceae) in Mexico
Two new species of Spigelia (Loganiaceae) from the states of Guerrero and Estado de Mexico are described, which places the country as the second highest area of diversity after Brazil.
A new species of Spigelia L. (Loganiaceae) from Mexico
A new Mexican species of Spigelia (Loganiaceae), distributed in the states of Guerrero and Michoacan, is described, highlighting this country as a center of diversity for this genus.
To converge or not to converge in environmental space: testing for similar environments between analogous succulent plants of North America and Africa.
- Leonardo O. Alvarado-Cárdenas, E. Martínez‐Meyer, M. Olson
- Environmental ScienceAnnals of botany
- 1 June 2013
Although fine-scale differences between sites were found, a coarser perspective shows that these sites are clearly similar as drylands with relatively moderate drought and mild temperatures, illustrating how all studies of convergence must address the issue of how similar two entities must be before they are considered convergent.
Systematics, distribution and conservation of Cascabela (Apocynaceae: Rauvolfioideae: Plumerieae) in Mexico
- Leonardo O. Alvarado-Cárdenas, J. Villaseñor, L. López-Mata, J. Cadena, E. Ortiz
- Biology, Environmental SciencePlant Systematics and Evolution
- 7 February 2017
This work revised the taxonomy of Cascabela for Mexico and applied species distribution models and geographical information tools to evaluate chorological aspects of the six species occurring in Mexico and provide a conservation category.