Siri Fjellheim

The paper identifies a constitutively active cortical nitrate-uptake cell state in perennial ryegrass linked to nitrogen-use efficiency, showing differences in transporter expression between high- and low-NUE genotypes.

The paper investigates whether drought tolerance preceded frost and winter tolerance in grasses, finding mixed evolutionary trajectories and supporting ancestral drought tolerance as a facilitator for cold biome transitions in some clades.

This study constructs a nuclear phylogeny of grasses using genome-scale data, showing agreement with plastome phylogeny and evidence for repeated reticulation events.

The paper tests if drought tolerance preceded frost tolerance in grasses but finds they evolved independently.