Seasonal and spatial variations in diversity and abundance of bacterial laccase-like genes in sediments of a subtropical mangrove ecosystem

Ling Luo; Ruo Nan Wu; Han Meng; Xiao Yan Li; Ji Dong Gu

doi:10.1016/j.ibiod.2016.07.002

Seasonal and spatial variations in diversity and abundance of bacterial laccase-like genes in sediments of a subtropical mangrove ecosystem

Ling Luo, Ruo Nan Wu, Han Meng, Xiao Yan Li, Ji Dong Gu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Laccases, involved in degradation of soil/sediment organic matter (SOM), play an important role in C and nutrient cycling in ecosystems. Laccases of fungal origins have been extensively studied, but only few reports are available for bacterial laccase-like genes, especially in coastal mangrove ecosystems. Therefore, we investigated the seasonal diversity and abundance of bacterial laccase-like genes in coastal mangrove sediments, and then compared to other ecosystems including Forest, Grassland, Fen and Bog. Additionally, the correlations between environmental factors and bacterial laccase-like communities were analyzed. The results demonstrated that the diversity and abundance of bacterial laccase-like genes in this mangrove ecosystem largely varied in sediment types and sampling seasons, and the microbial communities inferred by the functional genes included Proteobacteria, Actinobacteria, Bacteroidetes and some Unknown species as the major groups. In comparison, bacterial laccase-like communities in mangrove sediments were significantly different with the referenced ecosystems. The variations of total contents of C and N in soils/sediments are proposed to be the primary reasons for the differences of bacterial laccase-like genes among ecosystems. Moreover, the diversity index was negatively correlated with C:P and N:P, while the abundance showed a positive/negative correlation with water content and redox potential in this mangrove ecosystem, indicating a significant impact of other environmental factors, such as P and redox potential, on the diversity, distribution and the abundance of bacterial laccase-like genes which were underestimated in the previous research. Taking together, hereby P is proposed as a regulatory and limiting element for microbial SOM degradation through the laccases-initiated enzymatic reaction.

Original language	English
Pages (from-to)	260-267
Number of pages	8
Journal	International Biodeterioration and Biodegradation
Volume	114
DOIs	https://doi.org/10.1016/j.ibiod.2016.07.002
State	Published - 1 Oct 2016
Externally published	Yes

Keywords

Bacterial laccase-like genes
Laccases
Mangrove ecosystem
Microbial P limitation
Sediment

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10.1016/j.ibiod.2016.07.002

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@article{42e68d99b70b494c85612a75369be6c8,

title = "Seasonal and spatial variations in diversity and abundance of bacterial laccase-like genes in sediments of a subtropical mangrove ecosystem",

abstract = "Laccases, involved in degradation of soil/sediment organic matter (SOM), play an important role in C and nutrient cycling in ecosystems. Laccases of fungal origins have been extensively studied, but only few reports are available for bacterial laccase-like genes, especially in coastal mangrove ecosystems. Therefore, we investigated the seasonal diversity and abundance of bacterial laccase-like genes in coastal mangrove sediments, and then compared to other ecosystems including Forest, Grassland, Fen and Bog. Additionally, the correlations between environmental factors and bacterial laccase-like communities were analyzed. The results demonstrated that the diversity and abundance of bacterial laccase-like genes in this mangrove ecosystem largely varied in sediment types and sampling seasons, and the microbial communities inferred by the functional genes included Proteobacteria, Actinobacteria, Bacteroidetes and some Unknown species as the major groups. In comparison, bacterial laccase-like communities in mangrove sediments were significantly different with the referenced ecosystems. The variations of total contents of C and N in soils/sediments are proposed to be the primary reasons for the differences of bacterial laccase-like genes among ecosystems. Moreover, the diversity index was negatively correlated with C:P and N:P, while the abundance showed a positive/negative correlation with water content and redox potential in this mangrove ecosystem, indicating a significant impact of other environmental factors, such as P and redox potential, on the diversity, distribution and the abundance of bacterial laccase-like genes which were underestimated in the previous research. Taking together, hereby P is proposed as a regulatory and limiting element for microbial SOM degradation through the laccases-initiated enzymatic reaction.",

keywords = "Bacterial laccase-like genes, Laccases, Mangrove ecosystem, Microbial P limitation, Sediment",

author = "Ling Luo and Wu, {Ruo Nan} and Han Meng and Li, {Xiao Yan} and Gu, {Ji Dong}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

year = "2016",

month = oct,

day = "1",

doi = "10.1016/j.ibiod.2016.07.002",

language = "英语",

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pages = "260--267",

journal = "International Biodeterioration and Biodegradation",

issn = "0964-8305",

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TY - JOUR

T1 - Seasonal and spatial variations in diversity and abundance of bacterial laccase-like genes in sediments of a subtropical mangrove ecosystem

AU - Luo, Ling

AU - Wu, Ruo Nan

AU - Meng, Han

AU - Li, Xiao Yan

AU - Gu, Ji Dong

PY - 2016/10/1

Y1 - 2016/10/1

N2 - Laccases, involved in degradation of soil/sediment organic matter (SOM), play an important role in C and nutrient cycling in ecosystems. Laccases of fungal origins have been extensively studied, but only few reports are available for bacterial laccase-like genes, especially in coastal mangrove ecosystems. Therefore, we investigated the seasonal diversity and abundance of bacterial laccase-like genes in coastal mangrove sediments, and then compared to other ecosystems including Forest, Grassland, Fen and Bog. Additionally, the correlations between environmental factors and bacterial laccase-like communities were analyzed. The results demonstrated that the diversity and abundance of bacterial laccase-like genes in this mangrove ecosystem largely varied in sediment types and sampling seasons, and the microbial communities inferred by the functional genes included Proteobacteria, Actinobacteria, Bacteroidetes and some Unknown species as the major groups. In comparison, bacterial laccase-like communities in mangrove sediments were significantly different with the referenced ecosystems. The variations of total contents of C and N in soils/sediments are proposed to be the primary reasons for the differences of bacterial laccase-like genes among ecosystems. Moreover, the diversity index was negatively correlated with C:P and N:P, while the abundance showed a positive/negative correlation with water content and redox potential in this mangrove ecosystem, indicating a significant impact of other environmental factors, such as P and redox potential, on the diversity, distribution and the abundance of bacterial laccase-like genes which were underestimated in the previous research. Taking together, hereby P is proposed as a regulatory and limiting element for microbial SOM degradation through the laccases-initiated enzymatic reaction.

AB - Laccases, involved in degradation of soil/sediment organic matter (SOM), play an important role in C and nutrient cycling in ecosystems. Laccases of fungal origins have been extensively studied, but only few reports are available for bacterial laccase-like genes, especially in coastal mangrove ecosystems. Therefore, we investigated the seasonal diversity and abundance of bacterial laccase-like genes in coastal mangrove sediments, and then compared to other ecosystems including Forest, Grassland, Fen and Bog. Additionally, the correlations between environmental factors and bacterial laccase-like communities were analyzed. The results demonstrated that the diversity and abundance of bacterial laccase-like genes in this mangrove ecosystem largely varied in sediment types and sampling seasons, and the microbial communities inferred by the functional genes included Proteobacteria, Actinobacteria, Bacteroidetes and some Unknown species as the major groups. In comparison, bacterial laccase-like communities in mangrove sediments were significantly different with the referenced ecosystems. The variations of total contents of C and N in soils/sediments are proposed to be the primary reasons for the differences of bacterial laccase-like genes among ecosystems. Moreover, the diversity index was negatively correlated with C:P and N:P, while the abundance showed a positive/negative correlation with water content and redox potential in this mangrove ecosystem, indicating a significant impact of other environmental factors, such as P and redox potential, on the diversity, distribution and the abundance of bacterial laccase-like genes which were underestimated in the previous research. Taking together, hereby P is proposed as a regulatory and limiting element for microbial SOM degradation through the laccases-initiated enzymatic reaction.

KW - Bacterial laccase-like genes

KW - Laccases

KW - Mangrove ecosystem

KW - Microbial P limitation

KW - Sediment

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U2 - 10.1016/j.ibiod.2016.07.002

DO - 10.1016/j.ibiod.2016.07.002

M3 - 文章

AN - SCOPUS:84978796233

SN - 0964-8305

VL - 114

SP - 260

EP - 267

JO - International Biodeterioration and Biodegradation

JF - International Biodeterioration and Biodegradation

ER -

Seasonal and spatial variations in diversity and abundance of bacterial laccase-like genes in sediments of a subtropical mangrove ecosystem

Abstract

Keywords

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