Table 2 - Isolation of purple nonsulfur bacteria for the removal of heavy metals and sodium from contaminated shrimp ponds

Table 2. Optimum growth^a conditions in GM medium of selected PNB strains.

Parameter	NW16		KMS24
Parameter	Microaerobic-light	Aerobic-dark	Microaerobic-light	Aerobic-dark
Temperature (ºC)
25	++	++	+++	+++
30	++	++	++++	++++
35	++	++	++++	+++
40	+	+	++++	+++
pH
5	+	+	+	+
5.5	+	+	+	+
6	+	+	+	++
6.5	+	+	+	++
7	+	++	+	++
7.5	+	+	++	++
8	+	+	++	++
8.5	+	+	++	++
9	+	+	++	++
Shaking speed (rpm)
50	++	++	++++	++
100	+++	++	++++	+++
150	+++	+++	++++	++++
200	ND	+++	ND	+++
Light intensity (lux)
2000	++	ND	+++	ND
2500	++	ND	+++	ND
3000	++	ND	++++	ND
3500	++	ND	++++	ND
4000	++	ND	++++	ND

^aOD_660nm: ≤ 0.5 = +, > 0.5 OD ≤ 1.5 = ++, > 1.5 OD ≤ 3.00 = +++, > 3.00 = ++++
ND = not determined.

Supported by UNESCO / MIRCEN network

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