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Table 8 The effect of Chlorella vulgaris crude extracts (Grown on BG11 and 100% TSW) with optimum conc. of acetic acid (IAA) and benzyl adenine (BA) (obtained from dose response curve) on Tomato plant

From: Enhancement of plant growth regulators production from microalgae cultivated in treated sewage wastewater (TSW)

Parameter Shoot Length (cm) Leaves, numbers Root initiation Branching Leaf expansion
Control (MS medium) 5.217 ± 0.469bcd 3.500 ± 0.674 ab  +  +  +  - -
DMSO 5.083 ± 0.925 c d 3.417 ± 0.669ab  +  +  +  - -
IAA ( 0.5 ppm) 4.850 ± 0.454cde 3.083 ± 0.900bc  +  +  + 
 +  +  + 
- -
IAA (1.8 ppm) 6.850 ± 1.588a 3.583 ± 0.515ab  +  +  + 
 +  +  + 
- -
IAA (2.5 ppm) 6.008 ± 0.734 ab 3.750 ± 0.452a b  +  +  +  - -
BA (10 ppm) 4.533 ± 0.624c de 2.833 ± 0.577c d  +  -  + 
BA (25 ppm) 4.442 ± 0.516c d e 3.500 ± 0.674a b c  +   +  +   + 
BA (50 ppm) 4.425 ± 0.636de 3.333 ± 0.651a b c -  +  +  +   +  +  + 
IAA + BA (0.5 + 10) ppm 4.008 ± 0.478e 3.167 ± 0.577abc  +  +  +  - -
IAA + BA (1.8 + 25) ppm 4.533 ± 0.414de 3.667 ± 0.492ab  +  +  +   +  -
IAA + BA (2.5 + 50) ppm 4.525 ± 0.398 de 2.500 ± 0.674c  +  - -
C. vulgaris IAA optim. conc.(BG-11) 5.650 ± 0.678b c 2.917 ± 0.996 bc  +  +  + 
 +  +  + 
- -
C. vulgaris BA optim. conc. (BG-11) 4.808 ± 0.543b cd 3.000 ± 0.603bcd  +  +  +  +  - -
C. vulgaris(100%TSW) IAA optim. conc 5.050 ± 0.585 cd 3.750 ± 0.965a b  +  +  +  +  +  - -
C. vulgaris (100%TSW) BA optim. conc 5.5750 ± 0.3306a 2.917 ± 0.515c d  +  +  - -
  1. TSW treated sewage wastewater (-): Absence (6 +): the highest (5 +):high (4 +):moderate (3 +):low ( +):The lowest DMSO Dimethyl sulfoxide, MS Murashige and Skoog medium
  2. The values are the mean of three replicates ± SD
  3. Values followed by different letters are significantly different (p ≤ 0.05)