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Table 3 Some examples of salt-tolerant biomass-degrading enzymes and their properties

From: Facing the challenge of sustainable bioenergy production: Could halophytes be part of the solution?

Enzyme

Species and strain

Salt tolerance

Optimum temperature (°C)

Reference

Halophilic species

  Cellulase

Halomonas sp. S66-4

5 M NaCl

45

[122]

  Cellulase

Haloarcula sp. LLSG7

30% (w/v) NaCl

50

[157]

  Cellulase

Haloarcula sp. G10

27.5% (w/v) NaCl

60

[158]

  Xylanase

Uncharacterized strain CL8

5 M NaCl

60

[159]

  Xylanase

Uncharacterized strain CL8

5 M NaCl

65

[159]

  Xylanase

Halorhabdus utahensis

27%–30% (w/v) NaCl

55 and 70a

[160]

Salt-tolerant species

  Cellulase

Aspergillus terreus UniMAP AA-6

7.7% (w/v) NaCl

30

[161]

  Cellulase

Marinobacter sp. MSI032

2% (w/v) NaCl

27–35

[162]

  Xylanase

Bacillus sp. NTU-06

5% (w/v) NaCl

40

[163, 164]

  Cellulase

Stachybotrys microspora

2.56 M NaCl

50

[123]

  Cellulase

Bacillus sp. BG-CS10

2.5 M NaCl, 3 M KCl

55

[125]

  Cellulase

Brine shrimp (Artemia salina)

600 mM NaCl

55

[164]

  Cellulase

Thalassobacillus sp. LY18

10% (w/v) NaCl

60

[165]

  Cellulase

Bacillus agaradhaerens

2 M NaCl, 0.8 M KCl

60 °C

[166]

  Cellulase

Thermoanaerobacter tengcongensis MB4

3 M NaCl, 4 M KCl

75–80

[124]

  1. aTwo independent optima of activity were determined