Short-chain polyphosphate in arbuscular mycorrhizal roots colonized by Glomus spp. A possible phosphate pool for host plants

Ibuki Takanishi, Ryo Ohtomo, Masahito Hayatsu, Masanori Saito

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

We investigated the relationship between plant growth and polyphosphate (poly P) content in Allium fistulosum roots colonized by Glomus sp. R10 or Glomus etunicatum with different levels of phosphate addition. Poly P was quantified by two enzymatic assays: long-chain poly P (>∼20 inorganic phosphate [Pi] residues) with polyphosphate kinase, and total poly P with polyphosphate exopolyphosphatase. The difference between these values was designated as short-chain poly P (<∼20 Pi residues). The content of long-chain poly P in mycorrhizal roots and plant growth was poorly correlated or not, depending in fungal species. However, the content of short-chain poly P and plant growth was highly correlated in both species. This difference suggests that short-chain poly P in mycorrhizal roots colonized by Glomus spp. functions as a pool of Pi for the plant.

Original languageEnglish
Pages (from-to)1571-1573
Number of pages3
JournalSoil Biology and Biochemistry
Volume41
Issue number7
DOIs
Publication statusPublished - 2009 Jul 1

Keywords

  • Arbuscular mycorrhizal fungi
  • Chain length
  • Glomus spp.
  • Polyphosphate
  • Polyphosphate exopolyphosphatase
  • Polyphosphate kinase

ASJC Scopus subject areas

  • Microbiology
  • Soil Science

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