Early response mechanisms of perennial ryegrass (Lolium perenne) to phosphorus deficiency

BACKGROUND AND AIMS: Improving phosphorus (P) nutrient efficiency in Lolium perenne (perennial ryegrass) is likely to result in considerable economic and ecological benefits. To date, research into the molecular and biochemical response of perennial ryegrass to P deficiency has been limited, particu...

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Bibliographic Details
Published in:Annals of botany 2011-02, Vol.107 (2), p.243-254
Main Authors: Byrne, Stephen L, Foito, Alexandre, Hedley, Pete E, Morris, Jenny A, Stewart, Derek, Barth, Susanne
Format: Article
Language:English
Subjects:
Acid soils
Barley
Gas Chromatography-Mass Spectrometry
Gene Expression Profiling
Gene expression regulation
Genes
Genome, Plant
Genotype
Genotypes
Lolium - genetics
Lolium - metabolism
Metabolome
Oligonucleotide Array Sequence Analysis
Organophosphorus Compounds - metabolism
Original
Phosphates
Phosphorus
Phosphorus - metabolism
Plants
Up regulation
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Summary:BACKGROUND AND AIMS: Improving phosphorus (P) nutrient efficiency in Lolium perenne (perennial ryegrass) is likely to result in considerable economic and ecological benefits. To date, research into the molecular and biochemical response of perennial ryegrass to P deficiency has been limited, particularly in relation to the early response mechanisms. This study aimed to identify molecular mechanisms activated in response to the initial stages of P deficiency. METHODS: A barley microarray was successfully used to study gene expression in perennial ryegrass and this was complemented with gas chromatography-mass spectrometry metabolic profiling to obtain an overview of the plant response to early stages of P deficiency. KEY RESULTS: After 24 h of P deficiency, internal phosphate concentrations were reduced and significant alterations were detected in the metabolome and transcriptome of two perennial ryegrass genotypes. Results indicated a replacement of phospholipids with sulfolipids and the utilization of glycolytic bypasses in response to P deficiency in perennial ryegrass. CONCLUSIONS: The transcriptome and metabolome of perennial ryegrass undergo changes in response to reductions in P supply after 24 h.
ISSN:0305-7364
1095-8290
DOI:10.1093/aob/mcq234