Scientists find new way to develop drought-resilient crops

Scientists find new way to develop drought-resilient crops
Dr Arun Yadav from the ANU Research School of Biology, ARC Centre of Excellence in Plant Energy Biology. Credit: Lannon Harley, ANU

Australian research could help breeders develop more drought-resilient crops that can produce more food and more profit with less water.

Drought tolerance is critically important in the face of climate change, population growth and land-use pressures.

Scientists from The Australian National University (ANU), ARC Centre of Excellence in Plant Energy Biology, and CSIRO Agriculture and Food have developed a new method to identify -resilient wheat quickly, cheaply and accurately.

Lead researchers Dr. Arun Yadav and Dr. Adam Carroll said selecting wheat that can grow better during short- to medium-term drought is vital to help fight food insecurity around the world.

"Our work may be instrumental for farmers to maximize food production in the face of increasingly ," said Dr. Yadav from the Research School of Biology and ARC Centre of Excellence in Plant Energy Biology at ANU.

"Hardy crop plants that can maintain under drought will help farmers produce more food reliably and maintain domestic and export markets for Australia."

"Drought is a major agricultural challenge in Australia, affecting food production, farmers' livelihoods and costing the government billions of dollars in relief efforts."

The measured the relative abundance of four amino acids in wheat plants to predict their ability to maintain yield under drought much more accurately than current state-of-the-art methods, said Dr. Carroll.

"This test can be done precisely in greenhouses all year round, at a fraction of the cost of traditional field-based methods. Plus, it gives more accurate predictions," he said.

Professor Barry Pogson, a 2019 Eureka Prize winner and Deputy Director of the ARC Centre of Excellence in Plant Energy Biology at ANU, was also a member of the research team.

"If breeders are provided with 1,000 wheat varieties to choose from, they can select the drought resilient lines through a simple assessment of the four we've identified," Professor Barry Pogson said.

"The challenge is for us to show this technique does scale beyond the varieties we have tested to date."

Dr. Greg Rebetzke and Dr. Gonzalo Estavillo from CSIRO Agriculture and Food conducted grain-yield evaluations under extensive field trials across the Australian wheat belt, which enabled the team to build a statistical model of the predictor.

The study is published in the Journal of Experimental Botany.

More information: Arun K Yadav et al. Wheat drought tolerance in the field is predicted by amino acid responses to glasshouse-imposed drought, Journal of Experimental Botany (2019). DOI: 10.1093/jxb/erz224

Provided by ARC Centre of Excellence in Plant Energy Biology

Citation: Scientists find new way to develop drought-resilient crops (2019, October 16) retrieved 10 December 2023 from
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