TABLE 4.

Phytostimulatory effects of Azospirillum sp. wild-type strain Sp7 and a phbC mutant on seeds of wheat (cv. Atir) and sweet corn (cv. Jubilee)

SeedsInoculantRoot length (cm)Root dry wt (g/plant)Leaf length (cm)Leaf dry wt (g/plant)
Sweet cornaWild-type Sp740.9 ± 14.2 Ac1.6 ± 0.3 A56.4 ± 6.4 A1.4 ± 0.6 A
phbC mutant32.5 ± 4.8 A1.3 ± 0.2 A57 ± 4.3 A1.5 ± 0.4 A
Control36.7 ± 10.3 A1.2 ± 0.5 A43.4 ± 2.9 B0.9 ± 0.2 B
WheatbWild-type Sp754.8 ± 4.5 A0.09 ± 0.03 A23.8 ± 2.7 A0.04 ± 0.01 A
phbC mutant54.5 ± 3.6 A0.09 ± 0.03 A23.7 ± 1.1 A0.03 ± 0.007 AB
Control31.7 ± 4.6 B0.06 ± 0.01 A19.5 ± 1.4 B0.02 ± 0.007 B
  • a Plants were harvested 33 days after inoculation.

  • b Plants were harvested 14 days after inoculation.

  • c The values are means ± standard errors for three replicates from one representative experiment. Each experiment was carried out twice, and similar results were obtained each time. Within a column different letters after values indicate that there is a significant difference at a P value of 0.05, as determined by one-way analysis of variance followed by a post hoc test.