Why can quilt plants dominate the world? or related to genome size.

Beijing time, January 25, according to foreign media reports, scientists may finally find out even Darwin's confused question: How flowering plants swept the world, become the main plant on earth? Flowering plants, also known as quilt plants, account for 90% of the world's existing plant species.
most crops are of this kind.
ancient times, conifers and ferns were the first to appear and then replaced by quilt plants that later lived, but the exact method was always an unknown mystery.
and a new study suggests that the reason may be related to the size of the genome, and the smaller the smaller the beneficial.
", "the key is the size of the cell and how to minimize the cell size while ensuring that all essential elements of life are not lacking."
," says Kevin Simonin of San Francisco State University.
"disgusting mystery" hundreds of millions of years ago, the earth was still dominated by conifers and ferns.
was first seen in quilt plants until 150 million years ago.
they spread rapidly around the world, transforming the surface from monotonous greentortos into a colorful color disc.
and for centuries, the secret of the success and variety of quilt plants has been the focus of scientists' discussions.
Darwin feared that the apparent, abrupt leap would challenge his theory of evolution, calling it a "disgusting mystery".
Simonen and Adam Roddy of Yale University.
they suspect that the size of the plant genome may have something to do with it.
they analysed the genome size of hundreds of plants in the Royal Botanic Gardens, including quilt plants, naked plants (conifers and ginkgos are among them) and ferns.
"strong evidence" that they compared the size of the plants' genomes to corresponding plant characteristics, such as the number of pores on the leaves.
the results provide "strong evidence" that the widespread spread of quilt plants is due to "shrinking the size of the genome".
by shrinking the genome, the nucleus shrinks, so the size of the plant cells decreases.
so that plants generate more revenue from carbon dioxide obtained through photosynthesis, making better use of light to convert carbon dioxide and water into glucose and oxygen.
the leaves of quilt plants contain more veins and pores, thus maximizing the yield of photosynthesis.
researchers say only quilt plants have experienced changes in the size of their genomes, which is "a key step in growing faster than other terrestrial plants."
" quilt plants are the most important kind of plants on earth, and now we have finally solved the mystery of how they thrived.
", "They also raised more questions about plants in the study.
for example, why do quilt plants scale down the genome more dramatically? Why are conifers and ferns still extinct with so large genomes and cells? Source: Sina Technology.