California Ag Network

Tag: NASA

  • Terrestrial Fungus May be Key to Farming in Space

    Mold is something that most people try to avoid, but NASA may soon welcome a certain type of mold aboard its spacecraft.

    On long-distance space voyages of the future, astronauts will have to grow some of their own food. That could be problematic, as there is notoriously little unused space aboard ship and crops take a long time to grow. But what if science could find a way around those issues?

    Cladosporium sphaerospermum strain TC09 stimulates plant growth. (Stephen Ausmus)

    “Some plants grow extremely fast, like many common weeds, while others grow very slowly,” said Chris Dardick, molecular biologist at the Agricultural Research Service’s (ARS) Appalachian Fruit Research Station in Kearneysville, WV. “What if we could make crop plants grow as fast as weeds? We have done just that.”

    ARS scientists found that an airborne fungus, Cladosporium sphaerospermumstrain TC09, speeds up plant growth. TC09 produces gasses, known as volatiles, that dramatically accelerate plant growth. TC09 is commonly found indoors and is not known to cause disease in plants or any ailments to humans or animals.

    In a Lab at the Kennedy Space center in Florida, ARS research technician Mark Sperry evaluates the performance of the fungus Cladosporium sphaerospermum strain TC09 with lettuce and simulated soil. (Cory Spern)

    “When the mold is grown alongside plants in a sealed container, the TC09-exposed plants grow 2 to 5 times faster,” Dardick said. “And if you feed the plants sugar at the same time, they can grow 10 to 25 times faster in the presence of TC09.”

    Not only do the plants grow faster, they tend to have thicker stems, larger leaves, and a more robust root system than plants not exposed to TC09. They also produce far greater yield – pepper plants produced up to 213% more fruit. Lettuce, arugula, kale, basil, and other leafy greens showed similar results.

    “How TC09 stimulates such rapid plant growth is currently unknown,” he said, “but it has become the interest of NASA to find out.”

    According to Dardick, NASA has tested TC09 on some of their most prized crops including “outredgeous” (red romaine) lettuce and mizuna, finding that TC09 worked extremely well in the artificial media typically used in spaceflight. In addition, NASA is constructing two plant growth chambers similar to what is used on the International Space Station that will be housed at the ARS research lab in Disney’s Epcot Center.

    Discovering how TC09 works could give NASA the solutions it’s looking for, regarding space and time limitations, Dardick said. Such technology could also revolutionize food production here on Earth as farmers face the challenge of feeding a population projected to reach 9.9 billion by 2050.

    This initial investigation was sponsored by the ISS U.S. National Laboratory, which works in coordination with NASA to fully utilize the orbiting laboratory to bring value to our nation through space-based research and technology development. – By Scott Elliott, USDA-ARS Office of Communications. Autumn Canaday contributed to this story.

  • Central Valley Groundwater may be Unable to Recover from Past and Future Droughts

    American Geophysical Union — Groundwater in California’s Central Valley is at risk of being depleted by pumping too much water during and after droughts, according to a new study in the AGU journal Water Resources Research, an interdisciplinary journal that focuses on hydrology and water resources.

    The new study shows groundwater storage recovery has been dismal after the state’s last two droughts, with less than a third of groundwater recovered from the drought that spanned 2012 to 2016.

    Under a best-case scenario where drought years are followed by consecutive wet years with above-average precipitation, the researchers found there is a high probability it would take six to eight years to fully recover overdrafted water, which occurs when more groundwater is pumped out than is supplied through all sources like precipitation, irrigation and runoff.

    However, this best-case scenario where California has six to eight consecutive wet years is not likely because of the state’s increasingly hot and dry climate. Under a more likely, drier climate, there is less than a 20% chance of full overdraft recovery over a 20-year period following a drought.

    The Central Valley produces about a quarter of the nation’s food and is home to around 6.5 million people. Using too much groundwater during and after droughts could soon push this natural resource beyond the point of recovery unless pumping restrictions are implemented. The study finds recovery times can be halved with modest caps on groundwater pumping in drought and post-drought years.

    “This is really threatening,” said Sarfaraz Alam, a hydrologist at Stanford and lead study author. “There are many wells that people draw water from for drinking water. Since [groundwater is] always going down, at some point these wells will go dry and the people won’t have water.”

    Measuring Depletion

    The researchers combined NASA satellite data, well level data, detailed groundwater models and calculations of water inflows versus outflows to create a reliable assessment of groundwater storage data. They then used those data to predict how long it would take groundwater to fully recharge after droughts in the region under different climate scenarios.

    California has faced three major droughts since 2000: from 2007 to 2009, 2012 to 2016 and the state’s current drought period, which began in 2020. Researchers found that of the 19 cubic kilometers of groundwater (about 10% of the water volume in Lake Tahoe) lost during the 2006-2009 drought, only 34% was recovered after the drought. For the 2012-2016 drought, only 19% of 28 cubic kilometers lost were recovered.

    The researchers attributed especially low recovery in the post-2016 drought period to significant overdraft compared to limited water availability. 

    “It’s very hard to [measure] the volume of groundwater being pumped by humankind, and we really want to know that because we really want to know how much we’re depleting the groundwater,” said Donald Argus, a geophysicist who researches water resources at the NASA Jet Propulsion Laboratory who was not associated with the study. “If we start to understand how much water is replenished each year or each rainy season, then we get an idea of how much groundwater we’re pumping out, and whether we can sustain it or not.”

    Opportunities for Management 

    Despite the grave predictions of recovery time, researchers found that there is hope for increased water recovery when management practices are put into place. If California’s climate remains at historical levels, rather than worsening with climate change, groundwater extraction caps could significantly improve aquifer resistance to drought. Overdraft recovery times could be reduced by about two times if pumping restrictions are put in place during no-drought years and could be reduced by up to four times with pumping restrictions, according to the study.

    However, these management practices can create complicated trade-offs for laborers in the region, according to Alam. The livelihoods of those for those who depend on the region’s agricultural industry is threatened when pumping for agricultural purposes is capped to prioritize drinking water. But finding a balance of water supply and demand will be necessary to continue to use the Central Valley’s aquifer resource.

    “Drought comes, groundwater goes. It’s super fast,” Alam said. “The policymakers and decision makers need to ensure they are making the right decision to make sure groundwater use is well managed.”

    AGU (www.agu.org) supports 130,000 enthusiasts to experts worldwide in Earth and space sciences. Through broad and inclusive partnerships, we advance discovery and solution science that accelerate knowledge and create solutions that are ethical, unbiased and respectful of communities and their values. Our programs include serving as a scholarly publisher, convening virtual and in-person events and providing career support. We live our values in everything we do, such as our net zero energy renovated building in Washington, D.C. and our Ethics and Equity Center, which fosters a diverse and inclusive geoscience community to ensure responsible conduct.

  • What Effects do Forest Fires have on the Storage of Carbon?

    The other day I was enjoying a nice breakfast, when I saw a man sitting next to me with his bicycle. Of course, my wife started talking with him! It turns out that he is a professor from Columbia, NY who, as far as I could understood, teaches something related to climate change. I couldn’t help asking him, do we still have time to fix the global warming problem and mitigate climate change? His tone of voice changed and his gazed off and said, “Save yourself, there is nothing we can do about it.” Still, a week after that conversation I am thinking about his comment! I consider myself an optimist, but it worries me when I see what is happening with the fires on the West Coast, and recently the floods in Belgium, Germany, and other places.

    According to the National Interagency Fire Center as of August 26, 88 large fires are burning in the US across 13 States. They have destroyed nearly 2.4 million acres of forest. We know that trees are our best friends, they can store and sequester carbon. We know that a healthy forest reduces carbon dioxide in the atmosphere, but what happens when a forest catches fire?

    The answer is not very simple because the carbon cycle is very complicated, with many variables involve. When carbohydrates are burned, they oxidize, creating carbon dioxide (CO2). Photosynthesis on the other hand, removes CO2 from the atmosphere and simultaneously stores carbon in the form of wood. According to NOAA, a very big and hot wildfire could emit the same amount of CO2 as six large coal power plants in one year.

    To better understand the role that a forest ecosystem has on the storage of carbon, a study was conducted by the NASA Institute on Climate and Planets. They studied what happens in unburned and burned sites in the Black Rock Forest, NY. The hypothesis for the study stated that the unburned site will significantly store more carbon than the burned site.

    The results, as we expected, showed that more carbon was stored in the unburned plot than in the burned plot, which means that the fire diminishes the carbon that was originally store in the wood. On the other hand, some of the vegetation is not consumed by burning, instead it is transformed to charcoal which has the advantage that it resists degradation so it can store carbon in soils over long periods of time. As it was mentioned before, the carbon cycle is very complicated, and fire has other consequences like emissions from decomposing dead wood which can surpass the direct emissions from the fire itself. But at the same time, new growth in the burned areas starts once again to take CO2 from the atmosphere and store it. This topic is very complicated, but fortunately, it looks like the effects of wildfires on climate change are smaller than the effects of coal, oil, and gas. — By Henry Mayer, University of Florida, Institute of Food & Agricultural Sciences

  • NASA Funds Tiny Tomatoes for Vertical Farming on Earth and Space

    Urban agriculture offers many benefits for food production but often has higher costs relative to traditional farming and is limited to only a few crops. By 2050, there will be nine billion people on the planet, but arable land is decreasing. Global food production will need to double to meet food needs, though climate change complicates the problem more.

    Robert Jinkerson, an assistant professor of chemical and environmental engineering at UC Riverside, is working to change this by engineering the size and nutritional value of tomato plants to increase both the diversity and value of crops that can be grown in urban controlled environment agriculture, or CEA.

    Jinkerson has received a $450,000 New Innovator grant from the Foundation for Food & Agriculture Research, or FFAR, to advance this research. FFAR’s New Innovator in Food & Agriculture Research Award provides early career scientists with funding to conduct audacious food and agriculture research.

    “Urban controlled environment agriculture can offer many benefits for the production of crops and is likely to supply more food in the future as worldwide food demand increases,” Jinkerson said.

    Often these urban CEA systems are designed to have plant growth areas stacked vertically to save space. However, this also decreases the height available for plant growth, limiting the size of crops that can be cultivated in vertical farms to small leafy greens.

    “In order to overcome these size limitations and to increase the variety of crops that can be grown in vertical farms, we are engineering tomato plants to have a small stature and are optimized for this unique growing environment,” said Jinkerson, who uses CRISPR/Cas9 gene editing to modulate key genes involved in plant development and architecture.

    In addition to reducing the size of plants, this project will also increase the nutritional value of these crops by increasing their vitamin content, making urban agriculture more profitable.

    The potential applications for these tiny tomatoes don’t end on Earth.

    Jinkerson, along with Martha Orozco-Cárdenas, director of the UCR Plant Transformation Research Center, have been awarded a NASA Space Biology grant to evaluate tomatoes from their prior work on the International Space Station. These plants, also engineered with gene editing technology and dubbed Small Plants for Agriculture in Controlled Environments, or SPACE tomatoes, will be grown in the Advanced Plant Habitat onboard the ISS to determine how these plants grow in microgravity. The SPACE tomatoes will be grown ‘seed-to-seed,’ meaning seeds will be harvested and the next generation grown in space, completing an entire lifecycle. These experiments, which will happen after several years of trials on Earth, will help establish methodologies to grow food on long duration space missions.

    “We are extremely excited to receive support for these projects and hope that the results will help transform the way we produce food here on Earth and beyond,” said Jinkerson.

    About UC Riverside

    The University of California, Riverside (www.ucr.edu) is a doctoral research university, a living laboratory for groundbreaking exploration of issues critical to Inland Southern California, the state and communities around the world. Reflecting California’s diverse culture, UCR’s enrollment is more than 24,000 students. The campus opened a medical school in 2013 and has reached the heart of the Coachella Valley by way of the UCR Palm Desert Center. The campus has an annual statewide economic impact of almost $2 billion. To learn more, email news@ucr.edu.

  • Water & Small Fruit Scientists Named to ARS Hall of Fame

    Two scientists have earned a place in the Agricultural Research Service (ARS) Science Hall of Fame for their pioneering and impactful research in small-fruits breeding and remote sensing for improved irrigation water scheduling.

    Chad E. Finn (posthumously) and William P. Kustas will be inducted in a virtual ceremony today rather than a physical event due to ongoing COVID-19 safety precautions. ARS established the Science Hall of Fame in 1986 to honor senior agency researchers for outstanding, lifelong achievements in agricultural science and technology.

    “Our two inductees exemplify the scientific excellence that has made ARS a premier research agency and world leader in addressing important issues facing agriculture today,” said Acting ARS Administrator Simon Liu.

    A plant geneticist at the ARS Horticultural Crops Research Laboratory in Corvallis, Oregon, Finn, who died December 17, 2019, is being posthumously honored for his outstanding and sustained contributions to the advancement of small-fruits crop research. His accomplishments include the development and release or co-release of more than 57 blackberry, raspberry, blueberry and strawberry varieties, some of which have become industry standards generating more than $450 million in fruit and plant sales over the past 10 years.

    Finn’s research endeavors have led to a small-fruits germplasm program that’s considered among the world’s most diverse and extensive, spanning several genera of plants including Rubus, Fragaria, Vaccinium and Actinidia. His discoveries provide a greater understanding and characterization of wild species in these genera as well as their importance as novel sources of genetic variability and useful traits such as aphid resistance and fruit processing quality.

    Finn also led an international black raspberry research project that developed a draft black raspberry genome—the first in the genus Rubus. Similar genomic efforts are underway in other berry crops. Throughout, he was a mentor to graduate students, avid presenter and participant on numerous committees and associations.

    Kustas, a hydrologist at the ARS Hydrology and Remote Sensing Laboratory in Beltsville, Maryland, is being honored for scientific accomplishments that include using satellite data with computer models for mapping evapotranspiration (ET)—the process of plant water use through transpiration and water loss or evaporation from the soil.

    In addition to monitoring ET, plant stress and drought, other applications of the models arising from Kustas and colleagues’ pioneering research include precise targeting of irrigation water to crops, including the vineyards of E&J Gallo Winery in California’s Central Valley. There, as part of the Grape Remote-sensing Atmospheric Profile and Evapotranspiration eXperiment (GRAPEX), Kustas and collaborators from NASA, Utah State University, University of California-Davis and Gallo are helping the winery better track soil and vine moisture levels with a view to reducing irrigation water use by up to 25 percent. Potentially, this reduction could translate to significant economic savings as well as contributing to sustainable groundwater management—a benefit the GRAPEX team expects could apply to other Central Valley vineyards as well as California’s nut orchard industry, which spans 1.5 million acres. “ET Toolkits” resulting from the project are also being readied for use in other water-limited western states.

  • USDA Study Reveals Airborne Fungus Can Trigger Plant Growth

    The U.S. Department of Agriculture’s (USDA) Agricultural Research Service (ARS) recently announced that a harmless airborne fungus, Cladosporium sphaerospermum strain TC09 (TC09), can dramatically accelerate plant growth if a germinating plant is near the fungus as it emits volatiles or gases.

    Scientists used tobacco and pepper plants as models to study the conditions for accelerated plant growth once exposed to TC09. Following a relatively short duration of exposure at the seedling stage, the plants began to sense the fungi’s volatiles and gases. USDA scientists were then able to stimulate extremely rapid plant growth, earlier flowering and fruit yield increases.

    “This is a game-changer for agriculture and for research that seeks innovative ways to accelerate plant growth,” said USDA Scientist Dr. Chris Dardick. “Its implications are far-reaching and will help ARS’ commitment to deliver cutting-edge scientific advances for American farmers and producers.”

    The effects of TC09 were largely correlated with the duration of exposure. Visual observation indicated that plants with TC09 exposure for 10 days exhibited substantially more vigorous growth, thicker stems, larger leaves, and a more robust root system relative to plants without fungal exposure. Results also showed that treated plants flowered 20 days sooner and pepper plants yielded up to 213 percent more fruit that was ready for harvest three weeks earlier than untreated controls. More recent studies have shown similar research results for numerous other crops such as lettuce, arugula, kale, basil, and other leafy greens.

    This species of fungus is commonly found in indoor environments and is not known to cause disease in plants or any ailments in humans or animals. Also, unlike other microbial species that have been tested, the researchers showed that TC09 does not induce defense or stress responses in exposed plants. Scientists hope to identify the specific volatiles and gases that stimulate plant growth in future research.

    Research on microbial biostimulants that enhance plant growth has recently intensified because they provide an eco-friendly, cost-effective and sustainable strategy to benefit agriculture. USDA scientists will continue to study TC09 and seek practical strategies to apply it during commercial crop production, particularly for urban and indoor agricultural systems. They are awaiting approval of a patent and commercial evaluation license and partnered with NASA to apply this research technology to spaceflight conditions. This research was supported in part by grants from USDA-ARS, ARS’ Appalachian Fruit Research Lab, and the Oak Ridge Institute for Science and Education.

    The Agricultural Research Service is the U.S. Department of Agriculture’s chief scientific in-house research agency. Daily, ARS focuses on solutions to agricultural problems affecting America. Each dollar invested in agricultural research results in $20 of economic impact.