*Editor’s Note: We’re providing a preview of this content due to the urgent and rapidly unfolding events surrounding the novel coronavirus pandemic. An updated version will appear in PNAS in the coming weeks. As COVID-19 spreads, communities across the United … Continue reading
Journal Club
Highlighting recently published papers selected by Academy members
PREVIEW Inner Workings: Molecular biologists offer “wartime service” in the effort to test for COVID-19
Categories: Inner workings | Medical Sciences
Tagged coronavirus, COVID-19, COVID-19 testing, pandemic, qPCR, RNA extraction, SARS-Cov-2
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Variation in a single gene increases plant yield in groups but not in pairs
Groups of diverse plant species often produce more seeds than monocultures. But whether plants ramp up yield in response to genetically distinct, direct neighbors, as opposed to a broader neighborhood of diverse plants, remains an open question in ecology. “It’s … Continue reading
Categories: Agriculture | Ecology | Genetics | Journal Club
Tagged farming, monoculture, MPK4 gene, plant breeding, wild coyote tobacco plant
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Judging others based on the rewards they receive correlates with political leanings
Which employee deserves the highest salary? Should a professor receive tenure? Did my spouse do their fair share of the household chores? These types of questions all require people to pass judgment on the effort expended by others. According to … Continue reading
Categories: Journal Club | Neuroscience | Political Science | Psychological and Cognitive Sciences
Tagged decision-making, politics, rewards
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Rice gene could make “green revolution” plants greener by cutting back on fertilizer
The green revolution was launched, in large part, with rather squat plants. In the 1960s, farmers began using semidwarf varieties of wheat and rice that produced many grain-bearing branches known as tillers. When farmers added nitrogen fertilizer, the plants gained … Continue reading
Categories: Agriculture | Climate science | Genetics | Sustainability Science
Tagged fertilizer, Green Revolution, greenhouse gas, NGR5, nitrogen, rice, tiller, wheat
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Molecular evidence supports Darwin’s adaptationist view, informing the debate over what drives evolution
Myriad genetic differences distinguish the genomes of two species. What fraction of those differences arises by positive natural selection versus random genetic drift is a central question and topic of debate in evolutionary biology. A recent study in Nature Ecology … Continue reading
Categories: Evolution | Genetics
Tagged adaptation, natural selection, negative selection, neutral theory of evolution, positive selection
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Study uncovers new privacy worries for direct-to-consumer DNA testing
Genetic testing services let consumers analyze their DNA to learn about their heritage, their relatives, and their risk for certain heritable diseases. But access to such personal data hasn’t been without controversy, stoking privacy fears. A recent study in eLife … Continue reading
Categories: Genetics | Journal Club
Tagged data privacy, genetic testing, heritability
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Genome of “mile-a-minute weed” hints at the secrets to its invasive success
The weedy vine Mikania micrantha, originally from Central and South America, has become a worldwide menace. Thus far, it’s spread to tropical climes in China and Southeast Asia, Australia, and islands of the Pacific and Indian Oceans, as well as … Continue reading
Categories: Environmental Sciences | Genetics | Journal Club | Plant Biology | Sustainability Science
Tagged carbon, genome, invasive species, Mikania micrantha, nitrogen, photosynthesis, stomata, transposon, weed
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For camouflaged animals, a quick dash is best to avoid detection
A hunting falcon flying over a field might not see a camouflaged rabbit hidden in the grass. But if that rabbit loses its nerve and runs, then the falcon will see its meal. Movement gives away even the best disguises. … Continue reading
Categories: Animal Behavior | Ecology | Journal Club
Tagged camouflage, peripheral vision, sensory ecology, visual ecology, visual perception
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Dopamine-making neurons, an ongoing mystery, play a bigger role in reinforcing learning than in initiating action
Deep in the midbrain, one type of neuron has two crucial jobs when it comes to acting while anticipating a reward—a state also known as Pavlovian conditioning. Called dopaminergic (DA) neurons, they can link a signal, such as a sound … Continue reading