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Isolation of a rice endophytic bacterium, P antoea sp. S d‐1, with ligninolytic activity and characterization of its rice straw degradation ability
Author(s) -
Xiong X. Q.,
Liao H. D.,
Ma J. S.,
Liu X. M.,
Zhang L. Y.,
Shi X. W.,
Yang X. L.,
Lu X. N.,
Zhu Y. H.
Publication year - 2014
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/lam.12163
Subject(s) - pantoea , straw , lignin , food science , biodegradation , bacteria , biology , chemistry , botany , agronomy , pseudomonas , genetics , ecology
This study focused on an endophytic bacterial strain, P antoea sp. S d‐1, which can be used to degrade lignin and rice straw. This strain was isolated from rice seeds by an optimized surface sterilization method. P antoea sp. S d‐1 showed exceptional ability to degrade rice straw and lignin. In rice straw or kraft lignin‐containing medium supplemented with 1% glucose and 0·5% peptone, P antoea sp. S d‐1 effectively reduced the rice straw mass weight by 54·5% after 6 days of treatment. The strain was also capable of reducing the lignin colour (52·4%) and content (69·1%) after 4 days of incubation. The findings suggested that the rice endophytic bacterium P antoea sp. S d‐1 could be applied for the degradation of lignocellulose biomass, such as rice straw. Significance and Impact of the Study Rice straw, an abundant agricultural by‐product in C hina, is very difficult to degrade because of its high lignin content. Due to the immense environmental adaptability and biochemical versatility of bacteria, endophytic bacteria are useful resources for biodegradation. In this study, we screened for endophytic bacteria capable of biodegrading rice straw and lignin and obtained one strain, P antoea sp. S d‐1, with suitable characteristics. S d‐1 could be used for degradation of rice straw and lignin, and may play an important role in biodegradation of this agricultural by‐product.