Role of cell wall of groundnut roots in solubilizing sparingly soluble phosphorus in soil

N. Ae, T. Otani, T. Makino, J. Tazawa

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Groundnut showed a superior ability to take up P from a soil with low P fertility compared with sorghum and soybean. This ability was not related to its better root development or production of root exudates capable of solubilizing iron- and aluminum-bound P. In efforts to determine the role of roots per se, we found that root cell walls from groundnut showed a higher P- solubilizing activity than those from soybean or sorghum. This finding corresponds well with observations in field and pot experiments using a soil with low P availability. The reaction site of P-solubilizing activity is stable against heating and enzyme digestion by cellulase and pectinase. This is probably the first evidence to demonstrate that cell walls of plant roots are involved in P-solubilizing activity.

Original languageEnglish
Pages (from-to)197-204
Number of pages8
JournalPlant and Soil
Volume186
Issue number2
DOIs
Publication statusPublished - 1996
Externally publishedYes

Keywords

  • P acquisition
  • P solubilization
  • cell-wall
  • groundnut
  • phosphorus
  • sorghum
  • soybean
  • strengite

ASJC Scopus subject areas

  • Soil Science
  • Plant Science

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