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

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

^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

^b Tukey post-hoc test; mean values in a row with the same letters are not significantly different (P = 0.05); ns not significant