Articles tagged with Plant Evolution
Researchers propose two distinct floras, Rhododendron Flora and Metasequoia Flora, to represent core regions of the Sino-Japanese and Sino-Himalayan flora. The study suggests East Asian flora is relatively young, with most clades originating since the Miocene, and may be a refugial area for ancient relict plants.
Research shows that plants evolve to stop producing toxic chemicals in response to immune herbivores. The study found genetic evidence of a gene's evolution and loss in multiple plant lineages, supporting the 'defense de-escalation' hypothesis.
A new theory proposes that underground adaptations, such as efficient roots and reduced reliance on fungi, enabled plants to thrive in diverse environments. This finding has significant implications for conservation and understanding plant evolution.
A new study integrates various theories on plant evolution timescales, suggesting that land plants likely arose during the Cambrian period and vascular plants between the late Ordovician and Silurian periods. This finding challenges existing theories on Earth's terrestrial biosphere assembly.
The study reveals that flowering plants diversified suddenly in the Cretaceous period, while molecular-clock dating suggests an older origin. The discrepancy is attributed to false precision on both palaeontological and molecular evolutionary timescales.
A study mapping China's 30,000 flowering plant species reveals a significant East-West divide in evolutionary relationships and biodiversity. The research highlights the need for conservation efforts in densely populated eastern China to protect threatened plant species and their animals.
New Caledonian crows manufacture hooks from plant stems, with techniques influenced by material properties and cutting methods. Deeper hooks are more efficient, but experienced birds may avoid making them due to increased time and effort required.
A study by Yale-NUS College Postdoctoral Fellow Eunice Tan found that beetle color patterns are similar to host plants, suggesting camouflage rather than warning signals. The research challenged the prevailing theory among coleopterists and highlights the complexity of natural selection in leaf beetles.
The study of Marchantia polymorpha's genome sheds light on land plant evolution, showing liverworts possess ancestral characteristics. The findings have significant implications for molecular and genetic studies, providing insights into future agricultural applications.
Research reveals that humans systemically affected crop evolution up to 30,000 years ago, triggering domestication of rice, wheat, and barley. This discovery proves the existence of dense populations and challenges previous understanding of agriculture's origins.
The University of Wisconsin-Madison will study how legumes evolved to cooperate with bacteria for nitrogen fixation. The goal is to recreate this ability in other crops like poplar and cereals, reducing fertilizer use and environmental pollution.
A new study by Jacob Weiner found that less competitive wheat varieties produce higher yields when grown in groups, challenging traditional plant breeding methods. This finding could lead to a shift towards group selection and the development of more efficient agricultural practices.
Researchers use metabolomics to analyze chemical compositions of Espeletia plants and confirm hypothesis on their origin and migration routes along the northern Andes. The study suggests that geographic isolation favored allopatric speciation in this plant genus.
Researchers at Michigan State University studied the unique molecule acylsugars found in tomato trichomes, revealing their diverse structures and potential as natural pesticides. This discovery opens an evolutionary window into plant defense metabolism and could lead to innovative solutions for pest resistance and human medicine.
Biologists at Lund University discovered that the receptors for detecting plant odors in the leaf miner moth Eriocrania semipurpurella also sense female sex pheromones. This finding suggests that plant odorant receptors evolved into sex pheromone receptors in primitive species of moths.
A recent study challenged the conventional view of coevolution between plants and herbivores, suggesting that plants' defensive traits, rather than their genetic relationships, are key factors in determining which species herbivores target. This new paradigm proposes that herbivores may 'chase' or switch hosts based on the plant's defe...
A new study by Florida State University researcher David Houle found that small mutations in fruit flies can predict up to 40 million years of evolution for this common household pest. The research suggests a tight relationship between mutation effects and evolutionary changes.
A new study reconstructs the evolution of flowers and sheds light on what the earliest flowers might have looked like. The ancestral flower was bisexual, with both female and male parts, and multiple whorls of petal-like organs. This new model offers a plausible scenario to explain the spectacular diversity of floral forms.
A group of scientists found that parasitic nematode species can thrive without sex by using large, duplicated genomes. These genomes provide a reservoir for adaptation to different environments and plant hosts, giving the nematodes an evolutionary advantage over their sexual relatives.
Jiri Friml, a plant biologist at IST Austria, has received an ERC advanced grant to investigate the evolution of auxin transport and polarity in plants. His research will focus on understanding how plants adapt to environmental changes through the dynamic regulation of PIN transporters.
Researchers found that ant-plant symbioses break down at least 12 times over the past few million years, as plants adjust their host selection criteria based on altitude and potential tenants. Higher-altitude species tend to form domatia with larger access holes.
Researchers found that plants pollinated by bumblebees became more fragrant and had larger flowers with greater UV color component. In contrast, plants pollinated by hoverflies were smaller and less fragrant, with increased self-pollination.
Researchers studied 19 virus families and found that cross-species transmission has played a central role in their evolution. Co-divergence is relatively rare compared to cross-species jumps.
Scientists have identified a distant relative of the living Ginkgo biloba plant through the discovery of well-preserved fossil plants in Mongolia. The fossils, dating back to the early Cretaceous Period, reveal unique seed-bearing structures that are unlike any other known plant, living or extinct.
Researchers discovered a critical biochemical pathway in mosses that protects them from water loss and enables their adaptation to terrestrial environments. This finding suggests the prehistoric moss cuticle may have originated before lignin evolution in seed plants, influencing the development of complex ecosystems.
A Dartmouth-led study finds that roads trigger rapid evolutionary changes in wild populations, with some species adapting to pollutants and others becoming maladapted. This shift is transforming scientists' views of the biological impacts of roads on ecosystems.
A new study found that distantly related carnivorous plants, including pitcher plants, share similar genetic changes associated with their ability to digest insects. The research suggests that the evolutionary routes to carnivory may be limited and that these plants have co-opted ancient proteins to create digestive enzymes.
Delicate fossil remains of tomatillos found in Patagonia, Argentina, show that the nightshade family existed 52 million years ago, far earlier than previously thought. The discovery provides a rare link between ancient and modern plants, challenging traditional views on plant evolution.
The ginkgo genome reveals extensive expansion of gene families for defensive mechanisms against pathogens and insects, as well as unique traits such as transposable elements. The sequence provides a genetic resource for studying early events in tree evolution and the history of demography and distribution.
A new international collaboration has reconstructed the tree of life for Rosaceae and found strong evidence for whole genome duplications contributing to fruit diversity. The study suggests that enlarged and fleshy fruits likely evolved through two distinct ways, resulting in a wide range of fruit types across the 3,000 known species.
Scientists have reclassified the Caesalpinia group, including Brazil's national tree Pau-brasil, into a unique genus called Paubrasilia. The study reveals that Pau-brasil represents a distinct evolutionary lineage, highlighting its cultural and historical importance.
The moth species Heliothis subflexa has a specialized diet of Physalis fruits, which provides it with direct and indirect protection through the presence of withanolides. These compounds increase larval growth and immune system activity while also protecting against bacterial infections caused by Bacillus thuringiensis.
A joint University of Adelaide-Shanghai Jiao Tong University study provides the first broad picture of pollen allergen evolution and possible functions. The researchers' findings may help with reducing or preventing allergic diseases like asthma and hay fever.
A University of British Columbia study finds that evolution accelerates the speed of plant migration in response to climate change. Plants that undergo evolution disperse seeds and migrate farther than their non-evolving counterparts, even in challenging conditions.
Researchers found that plants can only withstand a limited number of genetic changes before population collapse and extinction. The study challenges common thinking on plant adaptability and has significant implications for agriculture and horticulture in the face of rapid climate change.
A computer program developed by researchers can categorize leaves into large evolutionary categories, leading to improved fossil identification and a better understanding of flowering plant evolution. The method achieves a 72% accuracy rate over 19 leaf families compared to random chance.
A new study of wild tomato genetics reveals complex genetic mechanisms driving diversification of plant species, with potential applications for creating more resilient crop plants. The research identifies three major genetic strategies behind the tomato's ability to adapt to ecological change.
Researchers investigate how plants respond to environmental changes and geographical variation, shedding light on their potential for evolution and adaptability. The study aims to improve predictions of selective pressures and failures for wild plants through comparative studies and genetic analysis.
Researchers used cactus species to test whether regions variable across closely related species show predictable intraspecific variability. The study found that rate-heterogeneity poses a practical challenge for researchers, and screening steps are necessary to discover regions of the genome with sufficient variability.
Scientists have developed a technique to capture rapidly evolving intronic regions of the genome, increasing knowledge of evolution in difficult groups. The new method resolved evolutionary relationships between closely related Heuchera species, previously impossible to infer.
A study by Liverpool School of Tropical Medicine researchers reveals that evolution can be highly predictable in terms of developing toxin resistance. Convergent evolution of two amino acid changes in a specific gene leads to the development of toxin resistance in various animals, including insects, reptiles, and mammals.
A recent study investigates multiple phylogenetic diversity metrics and discusses their role in preserving biodiversity. The study highlights the challenges of calculating these metrics due to data availability, but also notes that as more sequence data are generated, accurate calculations will become increasingly routine.
Researchers identified the crucial mutation that stripped away teosinte's hard casing, exposing the edible kernel. This genetic change allowed for the domestication of maize, leading to its widespread cultivation and impact on human societies.
A European-US consortium led by Instituto Gulbenkian de Ciencia aims to understand the evolution of plant reproduction, including ancient mechanisms of gamete development and fertilization. The project will identify genes useful to agriculture, increasing crop yield and food security.
Researchers have obtained the first precise estimates of how often epigenetic marks appear or disappear in the plant Arabidopsis thaliana. The study found that epigenetic mutations are about 100,000 times more likely than DNA sequence mutations and nearly all are neutral, not affecting gene expression.
A recent study by University of Stirling scientist Dr. Mario Vallejo-Marin discovered a new species of monkeyflower, Mimulus peregrinus, which provides real-time insight into evolution. The species has evolved multiple times in different regions, challenging the conventional understanding of species formation.
A new open-source software program named MarkerMiner facilitates identification of genes for elucidating evolutionary relationships between flowering plants. The software helps researchers discover genes useful for inferring evolutionary patterns by comparing genes across superficially similar plants.
Researchers found that fragmented chloroplast DNA sequences, known as cpSSRs, are still widely used to study plant genetics. The number of studies using cpSSRs has doubled in the past decade.
A recent study by Cornell University research found that symbiotic plants develop nectar glands to attract and feed protective animals like ants, leading to increased diversity in plant species over time. This mutualistic relationship allows plants to allocate energy resources to new traits and adapt to new environments.
A team of international researchers used DNA sequences to reconstruct the evolution of plants, revealing new insights into their relationships and adaptations. The study, part of the One Thousand Plants initiative, generated millions of gene sequences from diverse plant species.
Scientists have identified a 'weakness' in the clover genome that biases species to evolve the same trait. In six related clover species, genetic deletions led to the development of a cyanide-less trait, suggesting constrained evolution.
A UCI-Wesleyan study found that caterpillars with varied diets are less camouflaged and easier prey for birds. This increased risk is offset by the benefits of reduced predation on plants that caterpillars with restricted diets consume.
Recent research emphasizes the significance of gene flow in plant populations, counteracting forces of mutation, genetic drift, and selection. Gene flow between populations can be surprisingly far-reaching, even among stationary individuals, with some studies detecting alleles from hundreds to thousands of meters away.
Researchers found that seed dormancy allows plants to adapt to their environment, resulting in increased species diversity. Plants with this ability are more likely to colonize new areas and thrive under changing conditions, a strategy that has been around since the earliest seeds.
Researchers discovered horn-like structures on milkweed pollinia sacs, believed to prevent entanglement with rival plant pollinia. These findings suggest that physical contact can influence mating success and promote the evolution of defensive and attack weaponry in plants.
A team of scientists has identified the key player in plant nectar production, revealing that plants rely on SWEET9 to transport sugars into extracellular areas where nectar is secreted. The discovery suggests that this process evolved early in the formation of flowering plants and may have increased genetic diversity.
Recent research on serpentine ecosystems sheds light on the mechanisms of adaptation, natural selection, and endemism. Kruckeberg's seminal paper (1951) has influenced subsequent research on local adaptation, evolutionary pathways, and climate-soil relationships.
The study reveals that enzymes involved in breaking down fatty acids evolved independently in both plants and animals, mirroring each other's development. This finding suggests that both groups faced similar challenges when dealing with ingested fatty acids from plants.
Multicellularity has evolved in at least 25 plant and animal lineages, with different developmental pathways and mechanisms. The critical point is that natural selection acts on functional traits, allowing for multiple evolutions of multicellular organisms via various cellular biology aspects.
The study identified three repeated evolutionary shifts: seasonal shedding of leaves, thinner water-conducting pathways, and avoiding cold seasons. Researchers used a comprehensive 'timetree' with 32,223 species to model the evolution of these traits and climate surroundings.