Morphoanatomical and Biochemical Changes in the Roots of Rice Plants Induced by Plant Growth-Promoting Microorganisms
Table 1
Length (cm) and dry mass (g) of leaves, root, and root/leaf ratio of rice plants obtained from seeds microbiolized with PGPMs, 21 days following sowing in tubes (180 cm3) containing Gernino plant substrate.
Treatment
Length (cm)
Dry mass (g)
Leaves
Root
Root/leaf ratio
Leaves
Root
Root/leaf ratio
Trichoderma asperellum
(1)
33.5 ± 1.5(2) a(3)
24.3 ± 1.9 ab
0.73 ± 0.23 a
2.527 × 10−2 ± 2.0 × 10−3 a
1.079 × 10−2 ± 0.2 × 10−2 a
0.429 ± 0.32 a
Burkholderia pyrrocinia + Pseudomonas fluorescens
30.3 ± 1.5 a
22.6 ± 1.8 ab
0.75 ± 0.17 ab
1.645 × 10−2 ± 7.0 × 10−3 c
0.733 × 10−2 ± 0.4 × 10−2 c
0.464 ± 0.86 a
B. pyrrocinia
31.1 ± 1.6 a
17.5 ± 2.1 bc
0.63 ± 0.26 bc
2.120 × 10−2 ± 1.0 × 10−3 b
0.912 × 10−2 ± 0.7 × 10−2 b
0.412 ± 0.24 a
P. fluorescens
33.1 ± 1.5 a
16.3 ± 1.6 c
0.49 ± 0.16 c
1.500 × 10−2 ± 3.8 × 10−3 c
0.680 × 10−2 ± 0.4 × 10−2 d
0.450 ± 5.33 a
T. asperellum + B. pyrrocinia + P. fluorescens
29.7 ± 1.3 a
14.3 ± 1.8 c
0.48 ± 0.25 c
1.530 × 10−2 ± 2.0 × 10−3 c
0.615 × 10−2 ± 0.2 × 10−2 d
0.402 ± 0.15 b
Control (water)
28.2 ± 1.8 a
14.9 ± 2.5 c
0.53 ± 0.28 c
1.182 × 10−2 ± 2.0 × 10−3 d
0.464 × 10−2 ± 0.3 × 10−2 e
0.379 ± 0.19 b
T. asperellum (mix of four isolates: T-06, T-09, T-12, and T-52). Standard error ( ≤ 0.05). Averages followed by the same letter within the same column were not significantly different according to Duncan’s test ( ≤ 0.1). Number of samples = 20.
