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

BMC Plant Biology

Table 7 The effect of Nostoc muscorum crude extracts (Grown on BG11₀ and 100% TSW) with optimum conc. of acetic acid (IAA) and benzyl adenine (BA) (obtained from dose response curve) on Tomato plant

Parameter	Shoot Length (cm)	Leaves, numbers	Root initiation	Branching	Leaf expansion
Control (MS medium)	5.217 ± 0.469^bcd	3.500 ± 0.674 ^a	+ + +	-	-
DMSO	5.083 ± 0.925^cd	3.417 ± 0.669 ^a	+ + +	-	-
IAA ( 0.5 ppm)	4.850 ± 0.454^cde	3.083 ± 0.900^ab	+ + + + + +	-	-
IAA (1.8 ppm)	6.850 ± 1.588 ^a	3.583 ± 0.515^a	+ + + + + +	-	-
IAA (2.5 ppm)	6.008 ± 0.734 ^{a b}	3.750 ± 0.452 ^a	+ + +	-	-
BA ( 10 ppm)	4.533 ± 0.624^bc	2.833 ± 0.577^bc	+	-	-
BA (25 ppm)	4.442 ± 0.516^bc	3.500 ± 0.674^ab	+	+ +	+
BA (50 ppm)	4.425 ± 0.636^bc	3.333 ± 0.651^ab	-	+ + +	+ + +
IAA + BA (0.5 + 10) ppm	4.008 ± 0.478 ^e	3.167 ± 0.577^ab	+ + +	-	-
IAA + BA (1.8 + 25) ppm	4.525 ± 0.414 ^de	3.667 ± 0.492 ^a	+ + + +	-	-
IAA + BA (2.5 + 50) ppm	4.525 ± 0.398 ^{d e}	2.500 ± 0.674 ^b	+	-	-
N. muscorum IAA optim conc.(BG-11₀)	5.367 ± 0.350^bcd	3.333 ± 0.651^a	+ + +	-	-
N. muscorum BA optim conc. (BG-11₀)			+ + +	-	-
N.muscorum (100%TSW) IAA optim. conc	5.692 ± 0.392^bc	3.750 ± 0.452^a	+ + + + + +	-	-
N. muscorum(100%TSW) BA Optim. conc			+ +	-	-

TSW Treated sewage wastewater (-): Absence (6 +): the highest (5 +):high (4 +):moderate (3 +):low ( +):The lowest DMSO: Dimethyl sulfoxide MS: Murashige and Skoog medium
The values are the mean of three replicates ± SD
Values followed by different letters are significantly different (p ≤ 0.05)

ISSN: 1471-2229