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Table 2 Distribution of nifH-positive representative bacterial taxa in the leaf, stem and root of Jatropha germplasm accessions

From: Leaf-residing Methylobacterium species fix nitrogen and promote biomass and seed production in Jatropha curcas

Phylogenetic group Genera (21) Number of isolates
AR-activity positivea AR-activity negativeb
Leaf Stem Root Leaf Stem Root
Actinobacteria Cellulomonas   1     
  Curtobacterium 10 35 1    
  Microbacterium     16 21 4
  Micromonospora   1 2    
  Mycobacterium      1 5
Bacteroidetes Chryseobacterium   1 1    
Firmicutes Paenibacillus    3    
α-Proteobacteria Bradyrhizobium       1
  Ensifer    1    13
  Herbaspirillum    1    
  Mesorhizobium      3  
  Methylobacterium 63 21 2 30 7  
  Pleomorphomonas    1    
  Rhizobium    2 2 14 52
  Sphingomonas 15 16   12 16 4
β-Proteobacteria Achromobacter       11
  Burkholderia    4    1
γ-Proteobacteria Klebsiella    1    
  Kosakonia 1   8   1  
  Enterobacter   1 8    4
  Pantoea 4 12 33 11 2  
  Pseudomonas 6 16 104 1 8 39
  Stenotrophomonas    5    
  1. aNumber of positive isolates showing ethylene peak was measured by GC
  2. bNumber of isolates failed to produce ethylene peak or undetectable quantity