skip to main content


Title: Evolution of Electrogenic Ammonium Transporters (AMTs)

The ammonium transporter gene family consists of three main clades, AMT, MEP, and Rh. The evolutionary history of the AMT/MEP/Rh gene family is characterized by multiple horizontal gene transfer events, gene family expansion and contraction, and gene loss; thus the gene tree for this family of transporters is unlike the organismal tree. The genomes of angiosperms contain genes for both electrogenic and electroneutral ammonium transporters, but it is not clear how far back in the land plant lineage electrogenic ammonium transporters occur. Here, we place Marchantia polymorpha ammonium transporters in the AMT/MEP/Rh phylogeny and we show that AMTs from the liverwort M. polymorpha are electrogenic. This information suggests that electrogenic ammonium transport evolved at least as early as the divergence of bryophytes in the land plant lineage.
 [1] ;  [2]
  1. St. Catherine Univ., St.Paul, MN (United States). Biology Dept.
  2. Univ. of Minnesota, St. Paul, MN (United States). Dept. of Plant Biology
Publication Date:
Grant/Contract Number:
FG02-10ER15886; FG02-07ER15886
Accepted Manuscript
Journal Name:
Frontiers in Plant Science
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 1664-462X
Frontiers Research Foundation
Research Org:
St. Catherine Univ., St.Paul, MN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
59 BASIC BIOLOGICAL SCIENCES; ammonium transporters; electrophysiology; Marchantia polymorpha; phylogeny; electrogenicity
OSTI Identifier: