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Fire in the tree: The origin and distribution of fire-adapted traits within conifers and their influence on speciation rates across the conifer phylogeny.
Am J Bot
January 2025
Department of Biology, University of Idaho, Moscow, 83844, Idaho, USA.
Premise: Considering rapidly changing fire regimes due to anthropogenic disturbances to climate and fuel loads, it is crucial to understand the underpinnings driving fire-adapted trait evolution. Among the oldest lineages affected by fire is Coniferae. This lineage occupies a variety of fire prone and non-fire prone habitats across all hemispheres and has four fire-adapted traits: (1) thick bark; (2) serotiny; (3) seedling grass stage; and (4) resprouting ability.
View Article and Find Full Text PDFChemotypic diversity of bioprotective grass endophytes based on genome analyses, with new insights from a Mediterranean-climate region in Isfahan Province, Iran.
Mycologia
January 2025
Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428EGA, Argentina.
species are systemic, often seed-transmissible symbionts (endophytes) of cool-season grasses (Poaceae subfam. Poöideae) that produce up to four classes of bioprotective alkaloids. Whereas haploid species may reproduce sexually and transmit between host plants (horizontally), many species are polyploid hybrids that are exclusively transmitted via seeds (vertically).
View Article and Find Full Text PDFCeanothus: Taxonomic patterns in life history responses to fire.
Am J Bot
November 2024
Department of Biology, California State University, Bakersfield, 93311, CA, USA.
Premise: Ceanothus (Rhamnaceae) is a large genus of shrubs that dominate California chaparral and are resilient to fires. Persistence is ensured by resprouting and/or seedling recruitment from dormant seed banks. Some species do both and others, the obligate seeders, are entirely dependent on seedling recruitment.
View Article and Find Full Text PDFGermination responses to changing rainfall timing reveal potential climate vulnerability in a clade of wildflowers.
Ecology
November 2024
Department of Evolution and Ecology, University of California, Davis, California, USA.
The seasonal timing of life history transitions is often critical to fitness, and many organisms rely upon environmental cues to match life cycle events with favorable conditions. In plants, the timing of seed germination is mediated by seasonal cues such as rainfall and temperature. Variation in cue responses among species can reflect evolutionary processes and adaptation to local climate and can affect vulnerability to changing conditions.
View Article and Find Full Text PDFThe interplay between climatic niche evolution, polyploidy and reproductive traits explains plant speciation in the Mediterranean Basin: a case study in (Gentianaceae).
Front Plant Sci
August 2024
Department of Plant Biology and Ecology, Faculty of Biology, University of Seville, Seville, Spain.
Speciation and diversification patterns in angiosperms are frequently shaped by niche evolution. Hill is a Mediterranean genus with ca. 25 species, of which 60% are polyploids (tetra- and hexaploids), distributed mainly in the Mediterranean Basin and in areas with temperate and arid climates of Asia, Europe, North-Central Africa and North America.
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