Genetic characterization of the entire range of Cycas panzhihuaensis (Cycadaceae)
Plant Diversity, 2020 Cycas panzhihuaensis L. Zhou & S. Y. Yang (Cycadaceae) is an endangered gymnosperm species endemic to the dry-hot valley of the Jinsha River basin in southwest China. Although the wild C.
Siyue Xiao +3 more
doaj +3 more sources
ISSR Variation in the Endemic and Endangered Plant Cycas guizhouensis (Cycadaceae) [PDF]
Annals of Botany, 2004 Cycas guizhouensis (Cycadaceae) is a rare and endangered species endemic to the southwest of China. An investigation was undertaken into the genetic variation of wild populations.ISSR markers were used to determine the genetic variation within and between 12 extant populations of this species.Low genetic diversity (at population level, P = 14.21 %, H(E)
Xue-Jun Ge, Xun Gong
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Not that young: combining plastid phylogenomic, plate tectonic and fossil evidence indicates a Palaeogene diversification of Cycadaceae [PDF]
Annals of Botany, 2022 Jian Liu, Jan Anders Lindstrom, Xun Gong
exaly +2 more sources
Spermatophyta Molecular Clock: Time Drift and Recent Acceleration. [PDF]
Plant Environ InteractExponential increase in the base substitution rate in recent geologic time. ABSTRACT Angiospermae radiation is widely recognized as a mid‐Cretaceous event, but the adaptive radiation of Asarum and Viola as spring ephemerals also occurred during the Quaternary. To better understand the evolution of Angiospermae through geological time, a robust and well‐
Osozawa S.
europepmc +2 more sources
Conserving Large Old Trees in Guangxi, South China: Diversity, Distribution, and Preservation Strategies. [PDF]
Ecol EvolThis study comprehensively analyzes the diversity and distribution of over 500 year old large old trees (LOTs) in Guangxi, China, identifying 2630 LOTs from 149 species with a notable latitudinal gradient in richness. Tree vitality was found to be highest in rural and natural habitats like villages and scenic spots, compared to residential areas.
Yan J +6 more
europepmc +2 more sources
Ecological Isolation Maintains the Species Boundaries Between Two Sympatric <i>Cycas</i> From Southwest China. [PDF]
Ecol EvolThe study reveals that sympatric Cycas species (C. pectinata and C. simplicipinna) maintain strict species boundaries without hybridization, driven by reproductive isolation mechanisms (divergent coning times and pollinator specificity) and ecological niche differentiation (habitat preferences, soil pH differences).
Zheng F +6 more
europepmc +2 more sources
Anthropogenic Disturbances and Invasion of <i>Mikania micrantha</i> Threaten <i>Rauvolfia serpentina</i> Populations in Nepal. [PDF]
Ecol EvolThis research article investigate the current population dynamics of a threatened medicinal plant Rauvolfia serpentina.in differentially disturbed region of tropical forest in eastern Nepal. The findings revealed the cumulative impacts of over exploitation and invasion of Mikania micrantha have negatively impacted the population dynamics of R ...
Neupane A, Jnawali B, Ghimire SK.
europepmc +2 more sources
Reconciling fossils with phylogenies reveals the origin and macroevolutionary processes explaining the global cycad biodiversity. [PDF]
New Phytol, 2023 Summary The determinants of biodiversity patterns can be understood using macroevolutionary analyses. The integration of fossils into phylogenies offers a deeper understanding of processes underlying biodiversity patterns in deep time. Cycadales are considered a relict of a once more diverse and globally distributed group but are restricted to low ...
Coiro M +4 more
europepmc +2 more sources
Spatiotemporal Distribution Patterns and Conservation Priorities of Gymnosperms With Different Leaf Shapes in China Under Climate Change. [PDF]
Ecol EvolThis study modeled the spatiotemporal distribution patterns of 71 rare gymnosperm species (including varieties) with five different leaf morphologies in China in response to climate change and found that approximately half of the species will experience significant range contractions and migrate to higher altitudes toward the northwest.
Fu J +5 more
europepmc +2 more sources
Taxonomic list of the vascular flora of the islands of San Andres and Old Providence, Colombia [PDF]
Check List, 2015 We present an updated list of 532 vascular plant species distributed in 375 genera and 110 families on the islands of San Andres and Old Providence, Colombia, based on a compilation of published literature and some additional observations.
Alexandra Tobar-Vargas, Takumasa Kondo
doaj +3 more sources