39 North Innovation District Plan Unveiled
The Science in Our Food
(St. Louis Business Journal) Danforth Center to take discoveries to market with new hire Don MacKenzie is tasked overseeing the regulatory processes to bring the Danforth Center's technologies to market.
Friday, April 13, 2018 READ MORE
(St. Louis Post-Dispatch) 39 North plant science district gets trail, road planning funds Plans are in motion to rework roads and improve incubator space
Friday, March 2, 2018 READ MORE
(Ag Professional) The Future of Ag Tech in the Midwest
The development of new technology in agriculture has helped encourage young people
Tuesday, February 20, 2018 READ MORE
(Agri-Pulse) Who is leading the charge for new precision breeding tools?
Plenty of precision breeding innovation
(St. Louis Public Radio) St. Louis plant scientists use podcast to dig deep into the struggles of research
Researchers Liz Haswell and Ivan Baxter spend most their time trying to understand how plants function.
Monday, January 8, 2018 READ MORE
(HEC-TV) New Smart Crop-Monitoring Platform Alerts Farmers & Growers About Their Crops
Researchers at the Donald Danforth Plant Science Center have created a crop phenotyping station called the PheNode.
Wednesday, January 3, 2018 READ MORE
(KMOX) C-Speak Podcast: Sam Fiorello
Mark Reardon talks with Sam Fiorello on the C-Speak Podcast, the language of executives by KMOX
Friday, December 29, 2017 READ MORE
(Talking Biotech Podcast) Control of Aflatoxin in Groundnut
Dilip Shah and a team of researchers worked to devise a multi-faceted plan to protect groundnut from fungal infections.
Saturday, December 23, 2017 READ MORE
(MIT Technology Review) These Are Not Your Father's GMOS
A new wave of gene-edited crops are dodging regulators, and they're about to reach stores.
Thursday, December 21, 2017 READ MORE
New Hire to Advance Human Resources
Danforth Center Welcomes Anna Dibble
Wednesday, November 29, 2017 READ MORE
(Forbes) Collaboration Provides Hope In The Battle Against Mycotoxin Induced Cancer In The Developing World
There is new hope for a solution to this vexing health issue based on a recent collaboration between groups of scientists in the US and in India.
Saturday, November 4, 2017 READ MORE
(AgFunder News) Is St. Louis the Silicon Valley of Agtech?
St. Louis has worked hard to be a magnet for Fortune 500 companies. Nine members of this elite class call the city home, not the least of which is multinational agricultural giant Monsanto.
Thursday, November 2, 2017 READ MORE
DuPont Pioneer and Danforth Center Collaborate to Apply Cutting-Edge Technologies to Improve Crops for Smallholder Farmers
The suite of technologies DuPont Pioneer is providing to the project is revolutionary
Tuesday, October 17, 2017 READ MORE
National Science Foundation Funds Multi-Institutional Project to Improve Harvests of One of the Most Important Crops in U.S. Agriculture
Danforth Center Receives $3.4M to Improve Maize Architecture
Wednesday, October 11, 2017 READ MORE
U.S. Department of Energy Awards Danforth Center $16M to Enhance Sorghum for Bioenergy A multi-institutional research effort aims to optimize photosynthesis and water use efficiency
Monday, October 2, 2017 READ MORE
TechAccel Invests in Unique Sprayable RNAi Pesticide Technology First “Path to Commercialization” Grant Awarded to Donald Danforth Plant Science Center
Monday, September 11, 2017 READ MORE
Why a St. Louis event could be one of agtech’s biggest disruptors: 4 questions with Bayer's R&D head
Monday marks the start of the ninth annual Ag Innovation Showcase.
Monday, September 11, 2017 READ MORE
The Future of Agriculture is Center Stage at Ag Innovation Showcase
Bees, new food sources and machine learning are leading trends
Thursday, August 31, 2017 READ MORE
(St. Louis Business Journal) Greitens touts Israeli relationship as economic generator
St. Louis is already home to a number of Israeli-founded companies that have moved to the area thanks to GlobalSTL, an initiative started and organized by BioSTL several years ago.
Wednesday, August 16, 2017 READ MORE
Analysis Linking Field and Controlled Environments Reveals Key Traits Controlling Height
Discovery could help improve yield in food and bioenergy crops
Monday, July 10, 2017 READ MORE
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ST. LOUIS, MO, March 8, 2018 – A new study published in the journal Communications Biology has shed light on the earliest stages in the evolution of male-female differentiation and sex chromosomes—and found the genetic origins of the two sexes to be unexpectedly modest.
James Umen, Ph.D., member, Enterprise Rent-a-Car Institute for Renewable Fuels and Joseph Varner Distinguished Investigator at the Donald Danforth Plant Science Center was part of a research team led by Dr. Hisayoshi Nozaki at the University of Tokyo who have been investigating the evolution of male and female sexes in a group of freshwater photosynthetic protists called volvocine green algae, a group that is well-known to scientists for capturing early stages in the evolution of sexes and multicellularity. Previous studies in animals and plants identified a general trend of expansion and differentiation between male and female sex chromosomes, often leading to large genetic differences between them; but these studies could not capture the earliest stages of evolution where distinct sperm and egg cell types first evolved from a simpler ancestral mating system with equal-sized gametes, known as isogamy.
The research team focused on two especially informative and closely-related multicellular volvocine species from the genera Yamagishiella and Eudorina which bracket the transition from isogamy to male/female sexes. While 32-celled Yamagishiella and Eudorina colonies look very similar to each other, the former is isogamous while the latter produces small male gametes and large female gametes. The team used high-throughput genome sequencing of the chromosomal regions that specify mating type in Yamagishiella and male-female differentiation in Eudorina, and then compared these regions.
While evolutionary theory predicted an expansion and/or increased genetic complexity of the sex determining region associated with the evolution of sexes in Eudorina, the results of the study showed the opposite, with Eudorina having the most diminutive and genetically least complex sex-determining region found to date found among all volvocine species. In essence, the major difference between males and females in Eudorina could be reduced to the presence or absence of a single gene called MID that resides in a tiny chromosomal region.
“This new study punches a hole in the idea that increased genetic complexity of sex chromosomes accompanied the origin of sexes,” said Umen. “Moreover, the work also has practical implications since it expands our understanding of how to identify mating types and sexes in new species of algae that we might want to breed as crops for improved traits relating to biofuel or biotechnology applications.”
About The Donald Danforth Plant Science Center
Founded in 1998, the Donald Danforth Plant Science Center is a not-for-profit research institute with a mission to improve the human condition through plant science. Research, education and outreach aim to have impact at the nexus of food security and the environment, and position the St. Louis region as a world center for plant science. The Center’s work is funded through competitive grants from many sources, including the National Institutes of Health, U.S. Department of Energy, National Science Foundation, and the Bill & Melinda Gates Foundation. Follow us on Twitter at @DanforthCenter.
| Umen LabEnterprise Rent-A-Car Institute for Renewable FuelsCommunications Biologyalgae