Amino acids are a nitrogen source for sugarcane

Vinall, Kerry, Schmidt, Susanne, Brackin, Richard, Lakshmanan, Prakash and Robinson, Nicole (2012) Amino acids are a nitrogen source for sugarcane. Functional Plant Biology, 39 6: 503-511.


Author Vinall, Kerry
Schmidt, Susanne
Brackin, Richard
Lakshmanan, Prakash
Robinson, Nicole
Title Amino acids are a nitrogen source for sugarcane
Journal name Functional Plant Biology   Check publisher's open access policy
ISSN 1445-4408
1445-4416
Publication date 2012
Sub-type Article (original research)
DOI 10.1071/FP12042
Volume 39
Issue 6
Start page 503
End page 511
Total pages 9
Place of publication Collingwood, VIC, Australia
Publisher CSIRO
Collection year 2013
Language eng
Formatted abstract Organic forms of nitrogen (ON) represent potential N sources for crops and an alternative to inorganic N (IN, ammonium nitrate). Sugarcane soils receive organic harvest residues (∼40100kg ON ha -1), but it is unknown whether ON is a direct N source for crops. We investigated whether sugarcane can use organic monomers in the form of amino acids and whether the use of amino acids as a N source results in distinct metabolic or morphological change when compared with use of inorganic N (IN). Plantlets cultivated in sterile culture and young plants grown in non-sterile soil culture were supplied with IN, ON (five amino acids present in sugarcane soils), or combined IN and ON. All treatments resulted in similar biomass and N content indicating that sugarcane has a well developed capacity to use ON and confirms findings in other species. ON-supplied plants in axenic culture had increased total branch root length per unit primary root axis which has not been reported previously. In both experimental systems, ON supplied plants had increased asparagine concentrations suggesting altered N metabolism. Root of ON-supplied soil-grown plants had significantly reduced nitrate concentrations. We interpret the shift from nitrate to asparagine as indicative of N form use other than or in addition to nitrate by sugarcane. N metabolite profiling could advance knowledge of crop N sources and this will aid in development of N efficient cropping systems with a reduced N pollution footprint.
Keyword Ammonium
Nitrate
Organic nitrogen
Sugarcane production
Sustainable
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2013 Collection
 
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