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

Stephen L Byrne, Alexandre Foito, Pete E Hedley, Jenny A Morris, Derek Stewart, Susanne Barth

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    27 Citations (Scopus)

    Abstract

    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.
    © The Author 2010
    Original languageEnglish
    Pages (from-to)243-254
    Number of pages12
    JournalAnnals of Botany
    Volume107
    Issue number2
    DOIs
    Publication statusPublished - 2011

    Keywords

    • lolium perenne
    • perennial ryegrass
    • phosphorus deficiency
    • metabolic profiling
    • transcript profiling
    • cross species hybridization

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