This video is called The Amborella trichopoda genome; generating an evolutionary reference for plant biology; Dr.Joshua Der.
From World Science:
Shedding light on the origin of flowers
May 17, 2006
Flowers are almost everywhere, but the origins of flowering plants are far from clear: Charles Darwin called the problem an “abominable mystery.”
A study of a plant seen as a “living fossil” now suggests flowers arose during a time of intense evolutionary experimentation, a researcher says.
The plant, found in the rain forests of New Caledonia in the South Pacific, has a unique way of forming eggs, said William “Ned” Friedman of the University of Colorado at Boulder, who conducted the study.
This quirk, he added, suggests the plant may be a missing link between the remarkably diverse flowering plants and their yet-to-be-identified extinct ancestors.
Flowering plants, called angiosperms, are thought to have evolved around 130 million years ago from gymnosperms, the prevailing land plants when dinosaurs reigned in the Cretaceous and Jurassic eras.
Angiosperms have become the dominant plants on Earth today.
The study involved Amborella trichopoda, a relic species descended from an ancient lineage.
Friedman analyzed the female part of its reproductive apparatus, called the embryo sac.
This sac has an extra sterile cell accompanying the egg cell compared with most modern flowering species, he found.
That’s “akin to finding a fossil amphibian with an extra leg,” according to a commentary published in the May 18 issue of the research journal Nature, where Friedman’s study also appeared.
“We associate this structure with a relatively primitive reproductive process,” Friedman added.
The peculiar egg-forming structure, he suggested, may eventually link the odd South Pacific shrub to gymnosperms such as conifers—cone-bearing trees such as pines, firs and junipers.
The finding suggests flowering plants may have arisen during a time when plant evolution was “particularly flexible,” Friedman proposed. That may have allowed for the evolution of the seemingly costly business of making flowers.
Of the 300,000 flowering plants known today, Amborella is the only one that traces back to the common ancestor: here.
Evolution of flowering plants: here.
Caledonian crows and tool use: here.
Fossil conifers: Based on the newly discovered fossil specimens from 52 and 47 million years ago, Wilf and colleagues reassigned the fossil species to Papuacedrus, under the new name combination Papuacedrus prechilensi: here.
Related articles
- DNA of Oldest Flowering Plant Solves Darwin’s Evolution Mystery (scienceworldreport.com)
- Flowers abruptly proliferated on Earth millions of years ago – Times of India (economictimes.indiatimes.com)
- The origin of flowers: DNA of storied plant provides insight into the evolution of flowering plants (sciencedaily.com)
- Shrub genome reveals secrets of flower power (nature.com)
- Scientists Sequence Genome of Unique Flowering Plant Amborella trichopoda (sci-news.com)
A “Big Bang” of plant evolution:
Scientists are shedding light on what Charles Darwin called an “abominable mystery”: how flowers evolved.
http://www.world-science.net/othernews/071126_flowers.htm
LikeLike
Pingback: Dinosaur-era insect pollination discovery | Dear Kitty. Some blog
Pingback: Hydatellaceae plants’ family relationships different from what scientists used to think, DNA research shows | Dear Kitty. Some blog
Pingback: Bee fossil found from age of dinosaurs, evolved from wasps | Dear Kitty. Some blog
Pingback: Dinosaurs could swim, new research | Dear Kitty. Some blog
Pingback: Tulip tree new discoveries | Dear Kitty. Some blog
Pingback: Fern evolution | Dear Kitty. Some blog
Pingback: Sacred lotus closest to ancestor of flowering plants | Dear Kitty. Some blog
Pingback: Dinosaur age mammal discovery in China | Dear Kitty. Some blog
Pingback: New Caledonian crows make tools | Dear Kitty. Some blog
Pingback: Did insects, not asteroids or volcanoes, kill the dinosaurs? | Dear Kitty. Some blog
Pingback: Prehistoric plants exhibition in the Netherlands | Dear Kitty. Some blog
Pingback: Flowering plants after dinosaur extinction | Dear Kitty. Some blog
Pingback: Flowering plants evolution and Charles Darwin | Dear Kitty. Some blog
Pingback: Fungus, oldest land fossil, discovered | Dear Kitty. Some blog
Pingback: World’s oldest plant-eating lizard discovered in Japan | Dear Kitty. Some blog
Pingback: Hydatellaceae plants’ family relationships different from what scientists used to think, DNA research shows | Dear Kitty. Some blog
Pingback: Dinosaurs smelled first flowering plants | Dear Kitty. Some blog
Pingback: Spanish web-spinning spider from age of dinosaurs found | Dear Kitty. Some blog
Pingback: Dinosaur age flowers older than thought | Dear Kitty. Some blog
Pingback: Origin, evolution of land plants, new research | Dear Kitty. Some blog