Articles tagged with Angiosperms
A study comparing plant chromosome numbers among Italian, Slovak, and Polish floras found significant differences, confirming that mean chromosome number increases with increasing latitude. The findings suggest a relationship between polyploidy and latitude, but more research is needed for the Austral hemisphere.
Researchers found that bracken ferns release minimal amounts of volatile compounds when attacked by herbivores. However, treatment with plant hormone jasmonic acid induces a response similar to flowering plants, releasing terpenoids.
A team of scientists has discovered the oldest record of arthropods, including insects and mites, preserved in 100 million-year-old amber. The findings, published in the Proceedings of the National Academy of Sciences, provide new insights into the evolution of life on Earth.
The Ecological Society of America honored eight scientists with prestigious awards for their outstanding contributions to ecology, including Robert Naiman and Janet Lanza. The awards recognize meritorious research, teaching, and service to the field of ecology.
Researchers discovered predictable relationships in leaf vein systems that can predict past climates using the fossil record. The study found larger leaves have major veins spaced further apart, regardless of other variations.
Scientists have discovered the first record of insect pollination from 100 million years ago, found in amber from Northern Spain. The discovery reveals a new genus of thrips with highly specialized hairs to collect pollen grains, similar to those of bees.
Scientists have identified sections in the DNA of living beings as 'DNA barcodes' that differ among species, allowing for fast and accurate identification. The project aims to collect over 5,000 plant samples using these markers to monitor environmental effects and track species.
Multituberculates, rodent-like creatures, developed complex back teeth for crushing plant material, allowing them to thrive after dinosaur extinction, while sharper front teeth became less prominent.
A recent study by researchers at NESCent found that larger plant size can lead to bigger, more plentiful blooms, but accounting for overall size differences is crucial in detecting tradeoffs. The study tested three hypotheses and concluded that flower size-number tradeoffs are harder to spot due to various reasons.
Research by Cornell University and Rutgers University found that bees and flowering plants are keeping pace with climate change, arriving earlier in the spring. This shift has been observed since 1970, when warming temperatures accelerated most rapidly, according to the study published in Proceedings of the National Academy of Sciences.
Recent botanical exploration efforts in the Marquesas Islands have yielded 62 new species, including 18 newly described ferns and flowering plants. The discoveries bring the total native species to 360 and provide critical information for conservation.
A recent study by McGill biologist Jonathan Davies and colleagues suggests that the criteria for assessing risk of extinction in plants should be revised. The researchers found that species with small population sizes, even if not limited to a specific geographical range, can also be at high risk of extinction due to their youth.
A recent study by an international team of researchers found that the processes of extinction and speciation are linked in plants, with young species often appearing at high risk of extinction. This challenges the application of the same threat criteria across living organisms and regions.
Researchers have discovered an evolutionary change 65 million years ago that may have set the pace for present-day flowering plants' rapid growth rate. The team measured vein densities in ancient leaves to determine when modern vegetation first appeared.
Scientists discovered that ancient rainforests had more veins per unit area in leaves of flowering plants, allowing for increased water availability and carbon capture. This finding suggests that improved plumbing systems in these plants contributed to the evolution of modern rainforest ecosystems.
A new genetic study suggests that the evolution of flowering plants was 'jump started' by two major upheavals in the plant genome, occurring nearly 200 million years ago. These events produced thousands of new genes that drove the evolutionary explosion leading to the diverse range of present-day flowering plants.
Researchers are studying the unique species Amborella to learn about the evolution of flowers and their characteristics, such as drought resistance and fruit maturity. The team hopes to gain insights into how flowers diversified over time and how they respond to global warming.
Researchers discovered that orchids' adaptability to different pollinators and fungi allows them to coexist without competing for resources. The study found that shifts in pollination traits were crucial for speciation, while shifts in fungal partners contributed to coexistence.
A new study found that plants that can self-pollinate have higher extinction rates than those relying on external pollinators. This is because they often lack the genetic diversity needed to adapt to changing environments, making them more vulnerable to extinction.
A team of researchers led by Boris Igiâ31 and Emma Goldberg found that long-term evolutionary survival favors plants that avoid self-fertilization. This leads to greater genetic diversity among nightshade species. By avoiding self-fertilization, plants can more easily keep beneficial mutations and protect against harmful ones.
Researchers at UF are part of a nationwide team sequencing the Amborella trichopoda genome, a large shrub found only on the South Pacific island of New Caledonia. The information will help researchers determine whether specific genes or processes are unique to particular plants or date back to the beginnings of angiosperm evolution.
Lima bean plants produce extrafloral nectar to attract ants, which defend against herbivores. Red light influences the production of this nectar through phytochrome, a photoreceptor that regulates the signaling molecule jasmonic acid. This light-dependent regulation enhances defense when herbivory is most likely.
Researchers found that rotating HPS lamps are more cost-effective than incandescent lighting in promoting flowering in long-day ornamental species. The use of rotating HPS lamps resulted in lower energy consumption and lower weekly operating costs, making it an attractive alternative for commercial growers.
Scientists at the University of Calgary found that available area is the most important factor driving flower diversity, with family traits coming in second. The study suggests that geography and morphology play a significant role in shaping biodiversity patterns.
Researchers discovered that certain flowers produce heat as a reward to pollinators, which develop larvae in the spent flowers. This finding suggests a novel role for flower heating in plant-pollinator mutualism.
A study by ISU researcher Diane Debinski found that drought conditions could lead to a shift from flowering plants to shrubs in montane meadows. This change could impact wildlife populations, including elk, bison, and pollinators like butterflies. Medium-moisture meadows may be particularly vulnerable to climate change.
New climate simulations published in Proceedings of the Royal Society B demonstrate flowering plants' crucial role in regulating climate in ever-wet rainforests. Replacing these plants with non-flowering varieties leads to significant decreases in rainfall, underscoring their importance in maintaining tropical ecosystems.
Researchers use a virus-induced gene silencing approach to study the function of genes in plants' aging processes. They found that modifying genes involved in ethylene production can delay senescence in cut flowers and potted plants.
A study by Texas A&M University reveals that Hawaiian consumers prioritize price and size when purchasing orchids, with color being the least important factor. The research found that most respondents could identify the specific species of their purchased orchid, but 42% were unable to do so.
A 95-million-year-old Cretaceous African amber deposit reveals new fossils of insects, spiders, and bacteria, providing insights into an ancient tropical forest and the diversification of flowering plants during this time. The discovery is significant, as it is the first major find from the African continent.
Scientists found that milkweed species that grow quickly are more vulnerable to insect damage, while fast-growing plants rely on predators for protection. This study provides valuable insights into plant defense mechanisms and has implications for developing pest-resistant crops.
A new study confirms that early angiosperms were fast-growing and weedy, with leaf lifespans of less than 12 months. The research used fossil plant morphology to estimate life history strategies, suggesting that this growth pattern was common among plants 100 million years ago.
A new analysis of the plant family tree suggests that flowering plants may be considerably older than previously thought, with origins dating back to 215 million years ago. This finding fuels ongoing debates over different approaches to dating the tree of life and contradicts previous fossil record estimates.
Purple loosestrife, a destructive invasive plant, may face a reproductive penalty in northern climates. Northern populations have adapted by flowering earlier but suffer reduced seed production and smaller size.
A new DNA sequencing study has shed light on the evolution of flowering plants, revealing relationships between 70% of all plant species and two major groups that split apart over 111 million years ago. The study provides a clearer picture of the deep divergence that led to speciation in these plants.
A researcher has used motion-sensitive night cameras to capture the first known instance of a cricket functioning as an orchid pollinator. The 'raspy' cricket is also entirely new to science and has been found to be a surprisingly efficient pollinator, with higher rates of pollination and fruit set in certain orchid species.
Early flowering plants gained a competitive advantage through efficient leaf hydraulic systems, increasing photosynthetic capacity. This evolutionary step was triggered by low atmospheric CO2 levels and led to their dominance of land ecosystems.
An international study predicts a 50-day shift in flowering times of certain plants in specific climates by 2080, driven by global warming. The research used climate records from the past century and plant responses to air temperatures, predicting changes in spring blooming dates across different regions.
Researchers used historical climate data to predict that warmer temperatures will cause plants to flower up to 11 days earlier in Scotland by 2080. This change can lead to desynchronisation between plant and animal life, affecting ecosystems across the globe.
Flowering plants adapted anatomically to succeed, perfecting conducting systems with design flexibility and rapid adaptation capabilities. They retained juvenile tendencies, inventing new forms and wood patterns, giving them a competitive advantage over conifers.
A new algorithm, SERA, explores plant community dynamics and predicts changes due to environmental factors like climate change and invasive species. The model shows agreement with empirical data on trends in plant growth and development.
Researchers at Duke University found that ferns diversified significantly during the Cretaceous period, when flowering plants dominated plant communities. Ferns adapted by developing the ability to live on light with a red spectrum and becoming epiphytes, thriving in tree canopies.
A new University of Florida study analyzing DNA from living flowering plants shows that the ancestors of modern trees diversified rapidly 90 million years ago. This event led to the formation of forests that supported similar evolutionary bursts in animals and other plants.
Researchers from the University of Leicester and South Korea have discovered a gene, FBL17, that triggers precursor cells to divide into twin sperm cells. This discovery sheds light on the 'double fertilization' process, essential for seed production in flowering plants.
Yale researchers have confirmed that plants with fast reproductive cycles exhibit more rapid rates of molecular evolution. Their study analyzed DNA sequence data for five major evolutionary lineages within flowering plants, revealing a clear pattern where shorter-lived species show greater variability in their rates of evolution.
A University of Tennessee at Knoxville researcher has found that the ability of flowering plants to quickly and efficiently move sperm through a part of the plant was the key to their evolutionary diversity. This ancient trait allowed plants to grow longer pollen tubes, enabling them to develop more complex flowers and larger seeds.
Tobacco plants have evolved a self-incompatibility system to reject unwanted pollen and maintain genetic diversity. Researchers have identified a new factor, Stigma Expressed Protein (NaStEP), which plays a crucial role in the rejection mechanism.
Researchers have discovered that a fundamental building block in flowering plants evolved independently from lycophytes, an ancient plant group. This finding has significant implications for understanding plant biology and developing more efficient biofuel production methods.
The GBIF seed money awards will provide information on over 75,000 species and 1.8 million records, as well as two software tools. The funded projects tackle major global issues such as climate change, invasive alien species, and conservation strategies.
This special issue of the International Journal of Plant Sciences presents exciting research on flower evolution, pollination, and reproductive strategies in flowering plants. The focus is on evolutionary transitions, which are key elements of biological diversification.
Scientists discovered a unique method of reproduction in primitive plants named cycads, which heat up and emit toxic odors to repel and attract pollen-covered insects. This 'push-pull' pollination method may represent an intermediate step in the evolution of plant pollination.
Researchers discovered how plants evolved to respond to environmental changes by repressing growth, a process integrated by the plant growth hormone gibberellin. The ability emerged in flowering plants 300 million years ago and is linked to major stages in their evolution.
The study reveals that flowers' anthers play a crucial role in facilitating pollen collection by bees. The researchers found that the size, shape, placement, and timing of anthers can be controlled by genetic networks and non-coding sequences.
The sizes and positions of floral anthers facilitate pollen collection by buzz-pollinating bees, according to Dr. Endress's work. Slight genetic changes can affect flower morphology and pollinator compatibility, highlighting the importance of understanding these interactions.
Researchers found that mitochondrial genes transfer to the nucleus in clonally reproducing plants and those capable of self-pollination. This contradicts the expectation that such migration is driven by sexual recombination.
Researchers at Oregon State University have discovered the oldest bee ever known, a 100 million year old specimen preserved in almost lifelike form in amber. The discovery supports the theory that pollen-dependent bees evolved from meat-eating wasps and sheds light on the rapid expansion of flowering plants during the Cretaceous Period.
Researchers discover unique egg-forming structure in Amborella, potentially linking flowering plants to extinct gymnosperm ancestors. The novel embryo sac configuration could be a relic of intense evolutionary activity, shedding light on the origin and evolution of flowering plants.
Modern ants arose between 140-168 million years ago, coinciding with the emergence of flowering plants. This shift provided new habitats and food sources for ants, allowing them to diversify and become dominant in terrestrial ecosystems.
A recent study reveals that ancient ants arose 140-168 million years ago, in concert with the emergence of flowering plants. The researchers used DNA sequencing and fossil records to reconstruct the ant family tree, pushing back the origin of modern-day ants by at least 40 million years.
Conifers like Christmas trees survive due to efficient microscopic valves that allow water flow as easily as in flowering trees. The study found resistance to water flow was only 1.2 times greater in conifers, enabling them to dominate forests despite their shorter pipes.