Plant Genomics is Blooming, and It Could Change How We Grow Food
The world is entering an era of climate uncertainty, in which extreme weather events are no longer rare disruptions but the new normal. Prolonged droughts are followed by catastrophic floods, temperatures continue to rise, and diseases threaten ecosystems worldwide. These changes pose a significant challenge to plant health, crop yields, and biodiversity—at a time when one out of 11 people face hunger and the global food demand is only increasing as the population grows.1
Unlike animals which can migrate to find more hospitable conditions, plants are largely rooted in place. Their dispersal is slow and limited, so they must rely on adaptation to survive. With some of the most diverse genomes on Earth, the plant kingdom contains a rich genetic toolkit to respond to environmental shifts.
However, their genetic flexibility may not be enough to withstand the current pace of climate change. Scientists are studying how plants have adapted to harsh and shifting environments, hoping to apply this knowledge to engineer resilient super plants. Luckily, they can build on solutions that already exist in nature.
"It's really important to look across the plant kingdom because plants have solved so many problems already,” said Todd Michael, a plant genomicist at the Salk Institute for Biological Studies. “Why not read their genomes like a book and try to understand it and solve the problems using ancient knowledge?”
To achieve this, researchers first need access to genomic information. Until recently, decoding these complex genetic blueprints was beyond scientists’ reach. Now, thanks to advances in sequencing technologies, the plant genomics field is flourishing. With the ability to read plant DNA, researchers can explore genetic alterations that help plants adapt and even look into the past to track how plants have responded to climate shifts over centuries. The ultimate goal is to harness this knowledge and engineer future crops that can withstand harsh environments, produce higher yields, and help mitigate the effects of climate change.
A Cornucopia of Plant Genomes
In 2000, as the consortium behind the Human Genome Project announced a “working draft” of the sequence of the human genome—an achievement celebrated with a front-page story in The New York Times and a White House ceremony—scientists reached another major milestone: the first fully sequenced plant genome. The honor went to Arabidopsis thaliana, a cosmopolitan weed and a popular model organism.2 It was chosen, in part, for its relatively small genome—around 135 million base pairs. Still, sequencing it was no small feat. “It took several years and many, many millions of dollars,” said Michael.
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