- Commercial Manager Spain
- Crop Farm Manager Sharjah
- Commercial Manager Soft Fruits
- Assistant Nursery Manager - Tasmania, Australia
- Tissue Culture Lab / Operations Manager - Victoria, Australia
- Irrigation Manager - Tasmania or Victoria
- Chief Executive Officer Hortifrut IG Berries
- Head of Operations - Dubai, United Arab Emirates
- Greenhouse grower / production manager - Brazil
- Experienced International Trade Specialist
Top 5 -yesterday
- "Australian native flowers provide a true seasonality and florists love this variety, variability in supply”
- "Stunning genetics under the tropical sun in Singapore"
- Greenhouse plastic boom blights Vietnam’s vegetable and flower basket
- Designed glasshouse unfolds like a flower in just four minutes
- Plantipp and Concept Plants scoop prizes
Top 5 -last week
Top 5 -last month
US scientists identify drought-resistance plant genes
Plants thrive in drylands by keeping their stomata, or pores, shut during the day to conserve water and open at night to collect carbon dioxide. This form of photosynthesis, known as crassulacean acid metabolism or CAM, has evolved over millions of years, building water-saving characteristics in plants such as Kalanchoë, orchid and pineapple.
ORNL’s Xiaohan Yang led a team who identified a common set of genes that enable different drought-resistant plants to survive in semi-arid conditions. This finding could play a significant role in bioengineering energy crops tolerant to water deficits. Credit: Jason Richards/Oak Ridge National Laboratory, U.S. Dept. of Energy
“CAM is a proven mechanism for increasing water-use efficiency in plants,” ORNL coauthor Xiaohan Yang said. “As we reveal the building blocks that make up CAM photosynthesis, we will be able to bioengineer the metabolic processes of water-heavy crops such as rice, wheat, soybeans and poplar to accelerate their adaptation to water-limited environments.”
Scientists are studying a variety of drought-resistant plants to unlock the mystery of CAM photosynthesis. For this work, the ORNL-led team sequenced the genome of Kalanchoë fedtschenkoi, an emerging model for CAM genomics research because of its relatively small genome and amenability to genetic modification.
The team investigated and compared the genomes of K. fedtschenkoi, Phalaenopsis equestris (orchid) and Ananas comosus (pineapple) using ORNL’s Titan supercomputer.
An ORNL-led research team identified 60 genes that exhibited convergent evolution in crassulacean acid metabolism species, including a novel variant of a “worker” enzyme critical to CAM plants’ water-use efficiency. Representing the team are, from left, Degao Liu, Rongbin Hu, Xiaohan Yang, Robert C. Mosely and Kaitlin J. Palla. Credit: Jason Richards/Oak Ridge National Laboratory, U.S. Dept. of Energy
“It is widely accepted that some unrelated plants exhibit similar characteristics under similar environmental conditions, a process known as convergent evolution,” Yang said.
They identified 60 genes that exhibited convergent evolution in CAM species, including convergent daytime and nighttime gene expression changes in 54 genes, as well as protein sequence convergence in six genes. In particular, the team discovered a novel variant of phosphoenolpyruvate carboxylase, or PEPC. PEPC is an important “worker” enzyme responsible for the nighttime fixation of carbon dioxide into malic acid. Malic acid is then converted back to carbon dioxide for photosynthesis during the day.
“These convergent changes in gene expression and protein sequences could be introduced into plants that rely on traditional photosynthesis, accelerating their evolution to become more water-use efficient,” said Yang. The team published their findings in Nature Communications.
Smart water use
Crop production is the world’s largest consumer of freshwater. Availability of clean water resources is shrinking because of urbanization, human population growth and changes in climate, which presents a challenge to optimal growing environments.
To address this concern, engineering CAM photosynthesis into food and energy crops could reduce agricultural water use and boost crops’ resilience when the water supply is less than desirable.
“Studying the genome of water-efficient plants may also provide insights into a plant’s ability to use slightly saline water and maintain growth under higher temperature and lower clean water availability,” said Jerry Tuskan, coauthor and chief executive officer of the Center for Bioenergy Innovation led by ORNL. “If we can identify the mechanisms for water-use efficiency, we could move this trait into agronomic plants, supply non-potable water as irrigation to those plants and save the clean water for drinking.”
The team used ORNL’s Titan supercomputer to compare the genomes of Kalanchoë fedtschenkoi (back row) and Phalaenopsis equestris, or orchid (front row), as well as Ananas comosus, or pineapple. Credit: Jason Richards/Oak Ridge National Laboratory, U.S. Dept. of Energy
The study titled, “The Kalanchoë genome provides insights into convergent evolution and building blocks of crassulacean acid metabolism,” included ORNL coauthors Xiaohan Yang, Rongbin Hu, Hengfu Yin, Degao Liu, Deborah Weighill, Robert Moseley, Sara Jawdy, Zhihao Zhang, Meng Xie, Paul Abraham, Ritesh Mewalal, Kaitlin Palla, Henrique Cestari De Paoli, Anne Borland, Jin-Gui Chen, Wellington Muchero, Daniel Jacobson, Timothy Tschaplinski, Robert Hettich and Jerry Tuskan.
The study also included collaborators from University of Tennessee, HudsonAlpha Institute for Biotechnology, the DOE Joint Genome Institute, Fujian Agriculture and Forestry University, University of Nevada, University of Georgia, Northern Illinois University, University of Liverpool, University of Oxford, University of Illinois at Urbana-Champaign, Pacific Biosciences, Inc., Michigan State University, Newcastle University and Smithsonian Tropical Research Institute.
The research was funded by DOE’s Office of Science (Biological and Environmental Research, Genomic Science Program) and ORNL’s Laboratory Directed Research and Development program. The work also used resources of the Compute and Data Environment for Science at ORNL, a fully integrated infrastructure offering scalable computing, software support and high-performance cloud storage services and the Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility.
ORNL is managed by UT-Battelle for DOE’s Office of Science. The Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, visit http://science.energy.gov/.
Source: Oak Ridge National Laboratory
Receive the daily newsletter in your email for free | Click here
Other news in this sector:
- 2022-06-21 Why more growers are choosing polycarbonate panels
- 2022-06-17 Grow lights for herbs: which option to choose
- 2022-06-17 How agritech startup Ecozen helps farmers grow with its solar products
- 2022-06-15 Caterpillar control with insect filter system at Florein Gerbera's
- 2022-05-27 Making LEDs and lower energy costs accessible to HPS-growers
- 2022-05-26 Experimental study reveals impact of light spectrum on plant growth
- 2022-05-23 “Recycling of nutrient solutions leads to important savings”
- 2022-05-23 24/7 virtual scouts equipped with computer vision to identify pathogens and pests
- 2022-05-20 Coating with a helicopter
- 2022-05-19 Water treatment with nanobubbles leads to decreased losses in gerbera cultivation
- 2022-05-17 OptiBoost sees commercial breakthrough in retail, taking technology worldwide
- 2022-05-05 Improving growers' understanding of their irrigation water
- 2022-05-04 Ultrafiltration for closed cultivation, but what is ultrafiltration anyway?
- 2022-04-29 "I am convinced we all have to go in this direction in horticulture”
- 2022-04-27 "We use less heating compared to the HPS side of the greenhouse"
- 2022-04-26 "Investment in autonomous drones contributes to the digitization of greenhouses"
- 2022-04-21 SunPlus horticulture portfolio grows with the addition of deep-red
- 2022-04-21 "Chinese horticulture much more than production only"
- 2022-04-19 NL: Upgraded aerial work platform can get to work again
- 2022-04-15 Floricultural wholesalers choose to rent electric tow tractors from Steenks Service