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

A Proposed Structure For The Nucleic Acids

A Proposed Structure For The Nucleic Acids 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 ...
PNAS

PNAS Policy on Crossmark

CrossMark is a multipublisher initiative by the CrossRef Organization to provide a standard way for readers to locate the authoritative version of a document. By applying the CrossMark logo, PNAS is ...