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Table 5 Effect of Streptomyces sp. on plant dry weight of cultivated rocket, lamb lettuce, lettuce and tomato after 2 (a) and 3 (b) weeks of growth in vivo

From: Selection of Streptomyces against soil borne fungal pathogens by a standardized dual culture assay and evaluation of their effects on seed germination and plant growth

Dry weight (mg)

Seed treatment

Untreated control

S. anulatus CMJ58I

S. albidoflavus VT111I

S. cyaneus ZEA17I

a) 2 weeks

Cultivated rocket

5.13 ± 0.31a nsb

5.42 ± 0.06 ns

4.73 ± 0.24 ns

5.58 ± 0.14 ns

Lamb lettuce

3.91 ± 0.23 ns

4.6 ± 0.22 ns

3.93 ± 0.26 ns

4.65 ± 0.26 ns

Lettuce

3.32 ± .25 ns

3.16 ± 0.12 ns

3.14 ± 0.18 ns

3.66 ± 0.16 ns

Tomato

5.58 ± 0.08 ab

5.35 ± 0.21 b

4.95 ± 0.48 b

6.64 ± 0.26 a

b) 3 weeks

Cultivated rocket

101.88 ± 22.71 ns

65.95 ± 6.79 ns

88.28 ± 4.24 ns

70.80 ± 4.34 ns

Lamb lettuce

33.69 ± 1.39 ns

31.08 ± 1.49 ns

35.44 ± 2.27 ns

28.15 ± 2.62 ns

Lettuce

76.02 ± 4.48 ab

57.55 ± 4.21 b

79.37 ± 5.77 a

77.62 ± 5.91 a

Tomato

43.62 ± 6.35 ns

48.38 ± 5.15 ns

56.47 ± 4.31 ns

45.58 ± 6.93 ns

  1. a The mean value followed by standard error. At 2 weeks (a) the mean value was calculated as the dry weight of 50 plantlets in three replicates, except for lamb lettuce, where 30 plantlets were collected. At 3 weeks (b) the mean value was calculated as the average dry weight of 20 individually grown plantlets
  2. b Tukey post-hoc test; mean values in a row with the same letters are not significantly different (P = 0.05); ns not significant
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BMC Microbiology

ISSN: 1471-2180

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