Tropical South America has the highest plant diversity of any region today, but this richness is usually characterized as a geologically recent development (Neogene or Pleistocene). From caldera-lake beds exposed at Laguna del Hunco in Patagonia, Argentina, paleolatitude approximately 47 degrees S, we report 102 leaf species. Radioisotopic and paleomagnetic analyses indicate that the flora was deposited 52 million years ago, the time of the early Eocene climatic optimum, when tropical plant taxa and warm, equable climates reached middle latitudes of both hemispheres. Adjusted for sample size, observed richness exceeds that of any other Eocene leaf flora, supporting an ancient history of high plant diversity in warm areas of South America.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1126/science.1080475 | DOI Listing |
ISME J
January 2025
Evolutionary Ecology of Plants, Department of Biology, University of Marburg, 35043 Marburg, Germany.
Land-use changes threaten ecosystems and are a major driver of species loss. Plants may adapt or migrate to resist global change, but this can lag behind rapid anthropogenic changes to the environment. Our data show that natural modulations of the microbiome of grassland plants in response to experimental land-use change in a common garden directly affect plant phenotype and performance, thus increasing plant tolerance.
View Article and Find Full Text PDFMol Biol Evol
January 2025
State Key Laboratory for Crop Stress Resistance and High-Efficiency Production/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, China.
Nucleotide-binding leucine-rich repeat receptor (NLR) genes encode a pivotal class of plant immune receptors. However, their rampant duplication and loss have made inferring their genomic evolutionary trajectory difficult, exemplified by the loss of TNL family genes in monocots. In this study, we introduce a novel classification system for angiosperm NLR genes, grounded in network analysis of micro-synteny information.
View Article and Find Full Text PDFFront Vet Sci
January 2025
Associated Tissue Bank, Faculty of Medicine, Pavol Jozef Šafárik University in Košice, Košice, Slovakia.
Equine pastern dermatitis (EPD) is a multifactorial disease with a change in the skin microbiome. The present study monitored the influence of Biocenol™ 4/8 D37 CCM 9015 stabilized on alginite on the skin microbiota of healthy horses and model patients with EPD. Based on clinical signs, EPD lesions were identified as exudative or proliferative forms.
View Article and Find Full Text PDFFront Pharmacol
January 2025
School Hospital, Guizhou Medical University, Guiyang, China.
Thunb. (. ) is a shrub or tree of the genus , family Lamiaceae, which is widely distributed in China, Korea, India, Japan and Philippines.
View Article and Find Full Text PDFThe white prunicola scale (Maskell) is an important pest of fruit and ornamental plants, characterised by its wide distribution, broad host range and distinct biological traits. In this study, a comprehensive population genetic analysis of in China was conducted, focusing on genetic diversity, genetic structure, relationships among geographical populations, and population dynamics. Microsatellite molecular and mitochondrial COI markers were used to examine the genetic diversity and structure of 19 populations across 10 provinces in China.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!