Ultrastructure of the Nitrogen-Fixing Symbiont of Myrica pensylvanica L. (Bayberry) Root Nodules

1979 ◽  
Vol 140 ◽  
pp. S15-S21 ◽  
Author(s):  
D. R. Benson ◽  
D. E. Eveleigh
Keyword(s):  
Root Nodules ◽  
Nitrogen Fixing ◽  
Myrica Pensylvanica

Nitrogen-fixing homogenates of Myrica pensylvanica (bayberry) non-legume root nodules

1979 ◽  
Vol 11 (4) ◽  
pp. 331-334 ◽  
Author(s):  
D.R. Benson ◽  
D.E. Eveleigh
Keyword(s):  
Root Nodules ◽  
Nitrogen Fixing ◽  
Myrica Pensylvanica

All field-collected actinorhizae examined on Comptonia peregrina and Myrica pensylvanica in Maine are spore negative

1989 ◽  
Vol 67 (5) ◽  
pp. 1460-1464 ◽  
Author(s):  
Christa R. Schwintzer
Keyword(s):  
Soil Ph ◽  
Host Selection ◽  
Positive Root ◽  
Root Nodules ◽  
Tree Cover ◽  
Nitrogen Fixing ◽  
Selection Of ◽  
Myrica Pensylvanica

The occurrence of spore-negative and spore-positive root nodules of Comptonia peregrina (sweet fern) and Myrica pensylvanica (bayberry) was examined in Maine, as well as the distribution of these nitrogen-fixing shrubs and selected characteristics of the environments in which they occur. Thirty-one widely distributed sweet fern sites were examined, and 16 of these were sampled intensively. The 16 sites were relatively open with < 30% tree cover, and their soil was coarse textured with pH ranging from 3.8 to 6.1. Bayberry nodules were examined at eight sites. All eight sites had the same characteristics as those of sweet fern except that soil pH ranged from 3.4 to 7.4. All nodules on both sweet fern and bayberry were spore negative. One possible explanation is host selection of spore-negative Frankia strains.

scholarly journals Development of the nitrogen-fixing and protein-synthesizing apparatus of bacteroids in pea root nodules

1979 ◽  
Vol 562 (3) ◽  
pp. 515-526 ◽  
Author(s):  
T. Bisseling ◽  
R.C. Van Den Bos ◽  
M.W. Weststrate ◽  
M.J.J. Hakkaart ◽  
A. Van Kammen
Keyword(s):  
Root Nodules ◽  
Nitrogen Fixing ◽  
Pea Root

Biology of Rivellia melliginis (Diptera: Platystomatidae), a Consumer of the Nitrogen-Fixing Root Nodules of Black Locust (Leguminosae)

1990 ◽  
Vol 83 (5) ◽  
pp. 967-974 ◽  
Author(s):  
B. A. Mcmichael ◽  
B. A. Foote ◽  
B. D. Bowker
Keyword(s):  
Black Locust ◽  
Root Nodules ◽  
Nitrogen Fixing

Invasion of Alfalfa Root Nodules by the Nitrogen-Fixing Bacterium Rhizobium meliloti

2000 ◽  
pp. 235-236
Author(s):  
Gordon R. O. Campbell ◽  
Brett Pellock ◽  
Kristin Le Vier ◽  
Lai-Xi Wang ◽  
Sara M. Bush ◽  
...  
Keyword(s):  
Rhizobium Meliloti ◽  
Root Nodules ◽  
Nitrogen Fixing ◽  
Alfalfa Root

scholarly journals THE EFFECTS OF WATER STRESS ON NITROGEN-FIXING ROOT NODULES.

1972 ◽  
Vol 71 (3) ◽  
pp. 451-460 ◽  
Author(s):  
JANET I. SPRENT
Keyword(s):  
Water Stress ◽  
Root Nodules ◽  
Nitrogen Fixing

scholarly journals A New Species of Devosia That Forms a Unique Nitrogen-Fixing Root-Nodule Symbiosis with the Aquatic Legume Neptunia natans (L.f.) Druce

2002 ◽  
Vol 68 (11) ◽  
pp. 5217-5222 ◽  
Author(s):  
Raul Rivas ◽  
Encarna Velázquez ◽  
Anne Willems ◽  
Nieves Vizcaíno ◽  
Nanjappa S. Subba-Rao ◽  
...  
Keyword(s):  
Root Nodule ◽  
Root Nodules ◽  
Infection Process ◽  
Nitrogen Fixing ◽  
Rhizobium Tropici ◽  
Rdna Sequences ◽  
Root Nodule Symbiosis ◽  
16S Rdna Sequences ◽  
The Common ◽  
Nodule Symbiosis

ABSTRACT Rhizobia are the common bacterial symbionts that form nitrogen-fixing root nodules in legumes. However, recently other bacteria have been shown to nodulate and fix nitrogen symbiotically with these plants. Neptunia natans is an aquatic legume indigenous to tropical and subtropical regions and in African soils is nodulated by Allorhizobium undicola. This legume develops an unusual root-nodule symbiosis on floating stems in aquatic environments through a unique infection process. Here, we analyzed the low-molecular-weight RNA and 16S ribosomal DNA (rDNA) sequence of the same fast-growing isolates from India that were previously used to define the developmental morphology of the unique infection process in this symbiosis with N. natans and found that they are phylogenetically located in the genus Devosia, not Allorhizobium or Rhizobium. The 16S rDNA sequences of these two Neptunia-nodulating Devosia strains differ from the only species currently described in that genus, Devosia riboflavina. From the same isolated colonies, we also located their nodD and nifH genes involved in nodulation and nitrogen fixation on a plasmid of approximately 170 kb. Sequence analysis showed that their nodD and nifH genes are most closely related to nodD and nifH of Rhizobium tropici, suggesting that this newly described Neptunia-nodulating Devosia species may have acquired these symbiotic genes by horizontal transfer.

Sign in / Sign up

Export Citation Format

Share Document