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Table 3 Phenotypic characteristics of selected actinobacteria from A & N Islands

From: Novel marine actinobacteria from emerald Andaman & Nicobar Islands: a prospective source for industrial and pharmaceutical byproducts

Properties ActinopolysporaNIOT-VKKMA818 NocardiopsisNIOT-VKKMA525 MicrotetrasporaNIOT-VKKMA1719 DactylospoangiumNIOT-VKKMA21
Morphological characteristics
Spore morphology Long elongated Coccoid Short Finger shaped
Colour of aerial mycelium Pale yellow Dull brown Creamy white Greenish black
Colour of substrate mycelium Brown Brown Brown -
Soluble pigment Greenish brown Brown - -
Spore mass Pale yellow Dull brown Creamy white Greenish black
Biochemical characteristics
Gram staining + + + +
Indole production - - + -
Methyl Red + + - -
Voges Proskauer + - - -
Citrate utilization + - + -
H2S production + + - +
Nitrate reduction + - - +
Urease - + + +
Catalase + + + +
Oxidase + + + +
Melanin production + + + -
Starch hydrolysis + + + -
Haemolysis + + + -
Triple sugar iron - alk/alk alk/alk -
Survival at 50°C Excellent Excellent - -
Carbon source utilization
Starch + + + -
Dextrose + + + +
Fructose - + + -
Maltose + + - +
Mannitol - + - +
pH
5 - - - +
6 + + + +
7 + + + +
8 + + + +
9 + + + +
10 + + + +
11 + + + +
NaCl tolerence (%)     
5 + + + +
10 + + + +
15 + + + +
20 + + + +
25 - + - +
30 - + - +