| DOI | Resolve DOI: https://doi.org/10.1139/m81-160 |
|---|
| Author | Search for: Nelson, Louise M.1; Search for: Child, J. J.1 |
|---|
| Affiliation | - National Research Council of Canada. Prairie Regional Laboratory
|
|---|
| Format | Text, Article |
|---|
| Abstract | A survey of 108 isolates of Rhizobium leguminosarum was conducted to determine the variation in H₂ uptake and relative efficiency of N₂ fixation in Pisum sativum L. root nodules and the relation of relative efficiency to plant dry weight and N content. Only 14 of the isolates exhibited significant uptake hydrogenase activity and none of these had sufficient hydrogenase activity to recycle all of the H₂ produced by nitrogenase. In 74 of the isolates tested relative efficiencies of N₂ fixation were less than 0.60.Twenty-nine of the isolates were ineffective, since total plant N at harvest did not differ significantly from uninoculated controls. The remaining 79 effective isolates could be divided into low-and high-efficiency groups. Plants which were inoculated with isolates from the two groups and harvested after 4 weeks did not differ significantly in plant dry weight or N content. Among the isolates with high relative efficiency of N₂ fixation, two groups could be recognized: one possessing significant uptake hydrogenase activity, the other lacking hydrogenase activity but in which H₂ evolution was low. Although the two groups did not differ with respect to plant dry weight or N content, the identification of this latter group may be of some significance for optimizing the efficiency of N₂ fixation. |
|---|
| Publication date | 1981-10-01 |
|---|
| Publisher | Canadian Science Publishing |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| Identifier | NRCC-19296 |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 189aea0f-2e3a-4279-bf0b-9764260cd588 |
|---|
| Record created | 2023-09-11 |
|---|
| Record modified | 2023-09-11 |
|---|
