Table 1.
Endophyte strains used in this experiment.
| Strain | Identity | Origin | Appearance | PGPAa | GenBank accession no. | rRNA sequence size, partial (bp) |
|---|---|---|---|---|---|---|
| WP 4-2-2 | Burkholderia sp. | Poplar root | Buff | IAA, NA | KU495920 | 903 |
| WP 4-3-1 | Rhodotorula graminis | Poplar stem | Pink | CLP, IAA | KU500895 | 554 |
| WP 4-3-2 | Burkholderia sp. | Poplar stem | Buff, mucoid | Sd, NA | KU500893 | 947 |
| WP 4-3-3 | Curtobacterium sp. | Poplar stem | Bright yellow | IAA | KU550576 | 962 |
| WP 4-4-2 | Rahnella sp. | Poplar stem | Buff, mucoid | IAA, Sd | KU500894 | 966 |
| WP 4-4-6 | Pseudomonas sp. | Poplar stem | Pale yellow | IAA, NA | KU500891 | 1,032 |
| WP 4-5-3 | Rahnella sp. | Poplar stem | Buff, mucoid | Sd, IAA | KU500892 | 1,076 |
| WP 4-10-4 | Curtobacterium sp. | Poplar leaf | Bright yellow | NA, IAA | KU550577 | 859 |
| WP40 | Burkholderia sp. | Poplar stem | Buff | ofn, orb, hcn, Sd, NA, IAA | KF597274 | 1,494 |
| WP41 | Burkholderia sp. | Poplar stem | Buff | ofn, orb, Sd, NA, IAA | KF597275 | 1,494 |
| WP42 | Burkholderia sp. | Poplar stem | Buff | ofn, orb, Sd, hcn, NA, IAA | KF597276 | 1,494 |
| WW7 | Curtobacterium sp. | Willow stem | Pale yellow | IAA, Sd, NA | KU523564 | 926 |
| PD1 | Pseudomonas putida | Poplar stem | Buff | IAA | KF443801 | 1,496 |
| Pf 2-79 | P. fluorescens | Soil | Bright yellow | CLP, phz | ||
| Pf Q8r1-96 | P. brassicacearum | Soil | Buff | CLP, dapg, plt, prn |
a
Plant growth promoting activities: cyclic lipopetide (CLP) determined using the drop collapse assay; indole acetic acid (IAA) determined on YEM medium plus L-trpytophan using Salkowski reagent; gene clusters for the antifungal metabolites occidiofungin (ofn), ornibactin (orb), hydrogen cyanide (hcn), diacetylphloroglucinol (dapg), phenazine (phz), pyoluteorin (plt) and pyrrolnitrin (prn) loci determined using PCR; siderophore (Sd) determined by orange halo on CAS medium, nitrogenase activity (NA) determined by acetylene reduction assay.