Secretion time of phytosiderophore differs in two perennial grasses and is controlled by temperature

Daisei Ueno, Jian Feng Ma

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    Some perennial grasses secrete phytosiderophores from the roots in response to Fe-deficiency. Here, we characterized the pattern of phytosiderophore secretion by Lolium perenne (cv. 'Tove') and Poa pratensis (cv. 'Baron'), which are used to correct iron-deficiency induced chlorosis in fruit trees grown on calcareous soils. Both species showed a distinct diurnal rhythm in phytosiderophore secretion, but the secretion time differed between species; the secretion peak time was about 2 h earlier in L. perenne than in P. pratensis under the same growth conditions. The secretion time was shifted by changing temperature during the collection of phytosiderophores in both L. perenne and P. pratensis. Increasing root-zone temperature resulted in earlier secretion, while lowering the temperature resulted in delayed secretion. Furthermore, this shift of secretion time was achieved by changing the temperature around the root-zone. Shading treatment during the secretion period did not affect the secretion time in either species. These results indicate that the secretion of phytosiderophore is triggered by the temperature around the roots, but not light, in these two perennial grasses.

    Original languageEnglish
    Pages (from-to)335-341
    Number of pages7
    JournalPlant and Soil
    Volume323
    Issue number1
    DOIs
    Publication statusPublished - Oct 2009

    Keywords

    • Diurnal rhythm
    • Iron deficiency
    • Perennial grass
    • Phytosiderophore
    • Secretion
    • Temperature

    ASJC Scopus subject areas

    • Soil Science
    • Plant Science

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