Engineering Corynebacterium crenatum to produce higher alcohols for biofuel using hydrolysates of duckweed ( Landoltia punctata ) as feedstock

Table 3 The main components and carbohydrate composition after pretreatment with acid hydrolysis of wild duckweed Landoltia punctata (before fermentation: 0 h)

Pretreatment sample	Cellulose content	Protein content	Starch content	Lignin content
Main components
Dried duckweed	26.64%	23.71%	31.31%	1.89%
Fresh duckweed	3.81%	3.12%	4.32%	0.038%
Carbohydrate production after acid hydrolysis
Pretreatment sample	Glucose	xylose	Galactose	Fructose	Arabinose
Dried duckweed^a	5.22 ± 0.28	1.03 ± 0.055	0.49 ± 0.088	0.72 ± 0.21	0.46 ± 0.24
Fresh duckweed^a	0.61 ± 0.14	0.094 ± 0.11	0.044 ± 0.013	0.121 ± 0.016	0.094 ± 0.007

Content (g) of various components measured in 10 g pretreatment samples. ^aAcid hydrolysis pretreatment method.