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Hidden Causes of Variation in Offspring Reproductive Value: Negative Effects of Maternal Breeding Age on Offspring Telomere Length Persist Undiminished Across Multiple Generations.
Ecol Lett
January 2025
School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, UK.
Offspring of older breeders frequently show reduced longevity, which has been linked to shorter offspring telomere length. It is currently unknown whether such telomere reduction persists beyond a single generation, as would be the case if germline transmission is involved. In a within-grandmother, multi-generational study using zebra finches, we show that the shorter telomeres observed in F1 offspring of older mothers are still present in the F2 generation even when the breeding age of their F1 mothers is young.
View Article and Find Full Text PDFThe Metapopulation Bridge to Macroevolutionary Speciation Rates: A Conceptual Framework and Empirical Test.
Ecol Lett
January 2025
Museum of Zoology & Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA.
Whether large-scale variation in lineage diversification rates can be predicted by species properties at the population level is a key unresolved question at the interface between micro- and macroevolution. All else being equal, species with biological attributes that confer metapopulation stability should persist more often at timescales relevant to speciation and so give rise to new (incipient) forms that share these biological traits. Here, we develop a framework for testing the relationship between metapopulation properties related to persistence and phylogenetic speciation rates.
View Article and Find Full Text PDFLaser-wound stimulated adventitious root formation of cuttings involves a complex response at plant hormonal and metabolic level.
Front Plant Sci
December 2024
Leibniz University Hannover, Institute of Horticultural Production Systems, Section Woody Plant and Propagation Physiology, Hannover, Germany.
Introduction: The presence of wounds in addition to the excision-induced wounds after severance from the stock plants is known to positively influence adventitious root formation of woody plant cuttings. Previous morphological studies highlighted laser wounding as a technique allowing to precisely control the decisive ablation depth. However, the biochemical processes involved in the response of rooting to the additional wounding remained unexplored.
View Article and Find Full Text PDFObjectives Diabetes mellitus type 2 is a chronic metabolic disorder characterized by insulin resistance and progressive beta-cell dysfunction. As diabetes persists over time, more pronounced symptoms like polyuria, polydipsia, fatigue, and complications like neuropathy, retinopathy, and cardiovascular issues may develop. Therefore, this study assessed the clinical symptoms associated with type 2 diabetes regarding the duration of diabetes.
View Article and Find Full Text PDFFactors Associated With Mortality Among Hospitalized Children With Acute Bacterial Meningitis in a Resource-Limited Setting: A Retrospective Study.
Cureus
November 2024
Department of Internal Medicine, School of Medicine, Ibb University, Ibb, YEM.
Background: Acute bacterial meningitis (ABM) is a significant public health problem in developing countries, including Yemen, especially during warfare. This is because persistent political turmoil impedes ABM prevalence, etiology, and treatment. Here, we investigate the factors associated with mortality among hospitalized children with ABM in a resource-limited setting.
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