Transport of fixed nitrogen from soybean nodules inoculated with H2-uptake positive and negative Rhizobium japonicum strains

Kiwamu Minamisawa, Yasuhiro Arima, Kikuo Kumazawa

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The composition and the flow rate of xylem exudate were compared among 4 Rhizobium japonicum strains-H2-uptake positive and negative strains. The apparent rate of nitrogen transport from the nodulated roots formed with H2-uptake positive strains was bigher than that with Ha-uptake negative strains. Besides, the relative amount of asparagine-N in the xylem sap from the nodulated roots inoculated with H2-uptake positive strains was higher than that with H2-uptake negative strains though allantoin and allantoic acid were the principal forms of nitrogen in the xylem sap. It is suggested that the hydrogenase system affects the amount of fixed-N and the balance of carbon utilization in nodules and that a part of nitrogen assimilation system in the nodules may be altered.

Original languageEnglish
Pages (from-to)85-92
Number of pages8
JournalSoil Science and Plant Nutrition
Volume29
Issue number1
DOIs
Publication statusPublished - 1983 Mar
Externally publishedYes

Keywords

  • Asparagine
  • Hydrogenase
  • Ureide
  • Xylem exudate

ASJC Scopus subject areas

  • Soil Science
  • Plant Science

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