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 language | English |
---|---|
Pages (from-to) | 85-92 |
Number of pages | 8 |
Journal | Soil Science and Plant Nutrition |
Volume | 29 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1983 Mar |
Externally published | Yes |
Keywords
- Asparagine
- Hydrogenase
- Ureide
- Xylem exudate
ASJC Scopus subject areas
- Soil Science
- Plant Science