Proceedings of the National Academy of Sciences (PNAS)

Boosting crops’ natural capabilities could help feed a warming world

RIPE Project/Claire Benjamin (photographer), licensed under CC BY 4.0. It seems imperative, then, that we better understand ...
PNAS

Transcriptional regulation of thorn tip sclerification in plants

Flowering plants have evolved various types of physical defense mechanisms, such as thorns, prickles, and spines, to protect against herbivory. The common feature of these sharp structures is the ...
PNAS

Ocean warming enhances iron use efficiencies of marine ammonia-oxidizing archaea

Edited by Paul Falkowski, Rutgers The State University of New Jersey, New Brunswick, NJ; received October 29, 2025; accepted January 31, 2026 ...
PNAS

Noise in solid-state nanopores

We study ionic current fluctuations in solid-state nanopores over a wide frequency range and present a complete description of the noise characteristics. At low frequencies (f ≲ 100 Hz) we observe ...
PNAS

Superconductivity in the PbO-type structure α-FeSe

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PNAS

Marine heatwave decimates fire coral populations in the Caribbean

Marine heatwaves (MHW) are common destructive events affecting coral reefs. After decades of degradation, the shallow reefs of the United States Virgin Islands have been depleted of scleractinian ...
PNAS

Oligomycin frames a common drug-binding site in the ATP synthase

Edited by Gottfried Schatz, University of Basel, Reinach, Switzerland, and approved July 6, 2012 (received for review May 10, 2012) Based on the results presented here, we propose that in the intact ...
PNAS

Functional diversity in a lipidome

Functional diversity in a lipidome In their study, Schuhmacher et al. (5) use the tools of chemical biology to synthesize individual molecular species of DAG including stearyl arachidonyl DAG (SAG) as ...
PNAS

Policy distortions, farm size, and the overuse of agricultural chemicals in China

Overuse of agricultural chemicals has resulted in enormous damages to environmental quality and human health in China. Reducing the use of agricultural chemicals to an optimal level is a crucial ...
PNAS

Hamiltonian Systems and Transformation in Hilbert Space

Hamiltonian Systems and Transformation in Hilbert Space Note: The article usage is presented with a three- to four-day delay and will update daily once available. Due to ths delay, usage data will not ...
PNAS

THE MECHANISM OF SPARK DISCHARGE

Note: The article usage is presented with a three- to four-day delay and will update daily once available. Due to ths delay, usage data will not appear immediately following publication. Citation ...
PNAS

High bacterial diversity drives the suppression of a soilborne plant disease

Contributed by James Tiedje; received April 23, 2025; accepted January 26, 2026; reviewed by Gwyn A. Beattie and Corné M. Pieterse Soilborne diseases pose a significant threat to plant health, often ...