International Journal of Microbiology / 2018 / Article / Tab 5

Research Article

Evaluation of Bacillus Strains for Plant Growth Promotion and Predictability of Efficacy by In Vitro Physiological Traits

Table 5

Growth promotion effects of five Bacillus strains on wheat plants in 3w greenhouse pot experiments, with the two strains having the highest measurements for each parameter indicated with shading.

StrainShoot height (cm) (% increase)tShoot fresh weight (g) (% increase)Root fresh weight (% increase)GSF (%)uFIT2 (%)v
Trial 1Trial 2Trial 1Trial 2Trial 3Trial 1Trial 2Trial 3

Bacillus megaterium R18138aw (15)35 (21)0.44a (47)0.13 (30)0.46 (7)0.33a (154)0.36a (29)0.10a (43)6275
B. safensis R17336ab (9)31 (7)0.42a (40)0.11 (10)0.54 (26)0.29ab (123)0.27ab (−4)0.08ab (14)2538
B. simplex R18037a (12)33 (14)0.31b (3)0.13 (30)0.59 (37)0.07b (0)3333
Paenibacillus cineris R1770.20bc (54)0.24b (−14)00
P. graminis R20038a (15)33 (14)0.43a (43)0.13 (30)0.49 (14)0.28ab (115)0.18b (−36)0.11a (57)6262
Control33b290.30b0.100.430.13c0.28ab0.07bNAxNA
ANOVA P0.0600.1600.0010.0740.0930.0050.0180.035NANA

sShoot height data for trial 3 not presented because no strains caused an increase compared to the control based on Dunnett’s test and there was no significant treatment effect in the ANOVA. tPercentage increase of a growth variable by bacterial treatment compared to the control. uGSF = growth stimulation frequency; frequency at which a strain increased growth (at 95% confidence level) in all measurements across trials. vFIT2 = frequency in top 2 strains category. wNumbers followed by the same letter in each column are not significantly different at α = 0.05 according to LSD test. xNA = not applicable. Significant difference between treatment and control () according to Dunnett’s test. — = no data because strain was not tested

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