ProtistologyPublished 25 June 2025New molecular markers for quantifying abundance and gene expression of widespread and often undetected marine N 2 fixing symbionts of diatomsLinnéa M. V. Ström · Philip Ley · Eric A. Webb · David A. Hutchins · Mak Saito · Daniel Lundin · Rachel A. FosterFrontiers in Eukaryotic Microbiologydoi 10.3389/frpro.2025.1587784