The source of nitrogen (NH4 + or NO3 -) affects the concentration of oxalate in the shoots and the growth of Atriplex nummularia (oldman saltbush)

H. Al Daini, Hayley Norman, P. Young, Edward Barrett-Lennard

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Abstract

Atriplex nummularia Lindl. (oldman saltbush) is a halophytic shrub used widely as a forage for ruminant production in saline farming systems. However, it can contain high concentrations of oxalate in the leaves, which may cause calcium deficiency in grazing animals. We hypothesised that supplying NH 4 + instead of NO3 - to a clone of this species would decrease oxalate concentrations in the shoots, and also decrease plant growth. Oxalate concentrations were measured in plants in the field, and a glasshouse experiment was conducted in which plants were grown with 10mM NO3 - or NH4 +, with 50, 200 or 500mM NaCl. The field survey showed effects of site (P
Original languageEnglish
Pages (from-to)1057-1064
JournalFunctional Plant Biology
Volume40
Issue number10
DOIs
Publication statusPublished - 2013

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