Good seed, bad seed: Evolution divides the plant world

September 27, 1999

Rose may be a rose in some books, but in actuality flowers are deeply divided - that is, between eudicots and monocots, the two major classifications of flowering plants. However, despite the 130-240 million years of evolution separating monocots and dicots, scientists have predicted that the relative order of their genes will be fairly similar, as it is for mice and men (70 million years separation). In the September issue of Genome Research, Katrien Devos (John Innes Centre), Takuji Sasaki (Rice Genome Research Program), and colleagues take aim at this notion by showing that gene order in Arabidopsis, a model eudicot of the mustard family, is not preserved in rice, a model monocot.

Long a favorite among researchers, Arabidopsis is in fact the only plant for which most of the genetic sequence is known. Devos and colleagues compared the gene order of Arabidopsis and rice by selecting genes from a limited region of Arabidopsis chromosome 1 and searching for their counterparts in the known rice sequence. They found that the rice genes they located in this manner were scattered over 10 of the 12 rice chromosomes, indicating that gene order is not preserved between Arabidopsis and rice. These results not only reveal an evolutionary divide between dicots and monocots but also caution scientists hoping to exploit Arabidopsis sequence for understanding cereal crops like rice and wheat. When it comes to gene sequence, there may be no substitute for the real thing.
-end-
Contact information:

Katrien Devos
John Innes Centre
Norwich Research Park
Colney, Norwich NR4 7UH
United Kingdom
Fax: 44-1603-502-241
Email: katrien.devos@bbsrc.ac.uk

Cold Spring Harbor Laboratory

Related Flowering Plants Articles from Brightsurf:

When plants attack: parasitic plants use ethylene as a host invasion signal
Researchers from Nara Institute of Science and Technology have found that parasitic plants use the plant hormone ethylene as a signal to invade host plants.

Shifts in flowering phases of plants due to reduced insect density
A research group of the University of Jena and the iDiv has discovered that insects have a decisive influence on the biodiversity and flowering phases of plants.

210 scientists highlight state of plants and fungi in Plants, People, Planet special issue
The Special Issue, 'Protecting and sustainably using the world's plants and fungi', brings together the research - from 210 scientists across 42 countries - behind the 2020 State of the World's Plants and Fungi report, also released today by the Royal Botanic Gardens, Kew.

Dodder uses the flowering signal of its host plant to flower
Researchers from the Chinese Academy of Sciences and the Max Planck Institute for Chemical Ecology have investigated how the parasitic dodder Cuscuta australis controls flower formation.

Research reveals function of genetic pathway for reproductive fitness in flowering plants
A research collaboration has demonstrated the function of a genetic pathway for anther development, with this pathway proven in 2019 work to be present widely in the flowering plants that evolved over 200 million years ago.

Bumblebees speed up flowering
When pollen is in short supply, bumblebees damage plant leaves in a way that accelerates flower production, as an ETH research team headed up by Consuelo De Moraes and Mark Mescher has demonstrated.

The revolt of the plants: The arctic melts when plants stop breathing
A joint research team from POSTECH and the University of Zurich identifies a physiologic mechanism in vegetation as cause for Artic warming.

Bumble bee disease, reproduction shaped by flowering strip plants
Flowering strips -- plants used to augment bee foraging habitats -- can help increase bee reproduction but may also increase pathogen infection rates.

Study reveals important flowering plants for city-dwelling honey bees
Trees, shrubs and woody vines are among the top food sources for honey bees in urban environments, according to an international team of researchers.

Water lily genome expands picture of the early evolution of flowering plants
The newly reported genome sequence of a water lily sheds light on the early evolution of angiosperms, the group of all flowering plants.

Read More: Flowering Plants News and Flowering Plants Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.