Articles tagged with Angiosperms
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.
Researchers found that fish in ponds increase pollination of St. John's wort due to the decline of dragonfly populations, which then shift their prey to bees and flowers, fostering a mutually beneficial relationship. This study highlights the impact of species interactions on ecosystem dynamics.
Researchers have discovered a way to improve plant growth by increasing phosphorus uptake from the soil, reducing fertilizer needs and water pollution. The discovery, made by Dr. Maria Harrison, involves identifying genes that regulate the transfer of phosphorus into plants, with potential benefits for sustainable agriculture.
Researchers link warmer temperatures to earlier flowering times in plants, with a significant trend observed over the past century. The study suggests that existing collections of herbarium records can be used to measure regional effects of climate change on phenological events.
Researchers found that ferns diversified in response to low-light conditions created by the rise of flowering plants, leading to over 10,000 living species. The study, funded by NSF, uses genetic and fossil analysis to reveal the evolutionary history of ferns and angiosperms.
Scientists have discovered that rapidly evolving genes can reveal more historical signals than slowly evolving genes, providing a new perspective on plant classification. This approach has the potential to revolutionize our understanding of plant evolution, ecology, genetics, and biodiversity.
Researchers at UC Riverside discover chemocyanin, a small protein found in the stigma of lily flowers, which effectively guides sperm-laden pollen tubes to the plant's ovules. The study sheds new light on the complex process of seed formation in flowering plants.
A field study found that spiders ambushing pollinating insects decrease seed production in flowers. Ecologist Kenwyn Suttle suggests these interactions are common and overlooked by biologists. The research supports the idea that predation on pollinators can impact plant reproduction.
Scientists discovered a single gene, PHAN, that regulates leaf shape in plants. The study found similar patterns of PHAN gene expression and leaf shape in over 500 plant species, suggesting a limited number of ways to change leaf shape.
A new study suggests that horizontal gene transfer occurs in flowering plants for thousands of ordinary genes, contradicting the traditional view that eukaryotes acquire genes only through vertical transmission. The research found anomalous genetic material in mitochondrial DNA chromosomes across different species.
Scientists investigated how day length affects soybean flowering, finding early flowering is more active and controlled by small developing leaves or buds. The study's results could help develop cultivars adapted to short growing seasons for northern Canadian soybean producers.
A 125-million-year-old fossilized plant has provided clues about the evolution of modern flowering plants, which are the dominant vegetation on Earth. The discovery, made in northeast China, shows that flowering plants may have originated underwater before transitioning to land.
A team of researchers at Michigan Technological University has identified a gene responsible for producing syringyl lignin, a unique type of lignin found in hardwood trees. This discovery provides new insights into the evolution of angiosperms and their mechanical advantages over gymnosperms.
A Penn State study finds that both water lilies and Amborella are equally close genetically to the first flowering plant, offering new insights into its evolution. The analysis of DNA from three cellular compartments reveals a more diverse ancestry at the base of the angiosperm family tree.
A new interactive multimedia tutorial for woody plant identification has been released by Kendall/Hunt Publishing. The software includes 9,500 color photographs and scientifically tested to increase identification skills among users.
Chinese and US researchers have identified the world's oldest flowering plant, a 140-million-year-old fossil found in northeast China. The plant predates the previous oldest-known flower by over 25 million years, shedding light on the origins of flowering plants.