Ammonium toxicity and the real cost of transport

Herbert J. Kronzucker, Dev T. Britto, Romola J. Davenport, Mark Tester*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

193 Scopus citations


Recently, it has been proposed that ammonium is toxic to barley because of the energetic cost of pumping ammonium that has leaked into root cells back into the soil. This does not occur in rice because high levels of ammonium reduce the potential difference across the plasma membrane of rice-whereas the potential difference in barley appears to be ammonium insensitive. These results highlight the potentially high costs of membrane transport, and thus the central importance of transport processes in plants.

Original languageEnglish (US)
Pages (from-to)335-337
Number of pages3
JournalTrends in Plant Science
Issue number8
StatePublished - Jan 1 2001

ASJC Scopus subject areas

  • Plant Science


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