scholarly journals Changes in Bacterial Community Structure and Enriched Functional Bacteria Associated With Turfgrass Monoculture

2021 ◽  
Vol 8 ◽  
Author(s):  
Chang-Wook Jeon ◽  
Da-Ran Kim ◽  
Eun-Ji Bae ◽  
Youn-Sig Kwak
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Abiotic Stress Tolerance ◽  
Large Patch ◽  
Burkholderia Vietnamiensis ◽  
Functional Bacteria ◽  
Rhizosphere Bacterial Community ◽  
Patch Disease

There is increasing attention being paid to utilizing microbial communities to improve plant health while reducing management inputs. Thus, the objectives of this research were to assess changes in the rhizosphere bacterial community structure associated with long-term turfgrass monoculture and to demonstrate the feasibility of using functional bacteria as beneficial biocontrol agents. Large patch disease, caused by the fungal pathogen Rhizoctonia solani AG2-2, is a significant threat to turfgrass cultivation. Rhizosphere samples were collected from 2-, 13- and 25-year turfgrass (Zoysia japonica) monocultures. The 13-year monoculture field had a higher pathogen population density than both the 2- and 25-year monoculture fields. Analyses of the rhizosphere bacterial communities revealed that Streptomyces was dominant in the 2-year field and Burkholderia was enriched in the 25-year field. Based on the culturable rhizosphere bacteria, Streptomyces neyagawaensis J6 and Burkholderia vietnamiensis J10 were obtained from the 2- and 25-year fields, respectively. Application of S. neyagawaensis J6 and B. vietnamiensis J10 led to excellent inhibition of large patch disease as well as enhanced tolerance against drought and temperature stresses. The results showed that the selected bacteria could be developed as biocontrol and abiotic stress tolerance agents for turfgrass cultivation.

Soil remediation approach and bacterial community structure in a long-term contaminated soil by a mining spill (Aznalcóllar, Spain)

2021 ◽  
Vol 777 ◽  
pp. 145128
Author(s):  
M. Paniagua-López ◽  
M. Vela-Cano ◽  
D. Correa-Galeote ◽  
F. Martín-Peinado ◽  
F.J. Martínez Garzón ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Soil Remediation ◽  
Contaminated Soil ◽  
Bacterial Community Structure

Bacterial Community Structure in a Mollisol Under Long-Term Natural Restoration, Cropping, and Bare Fallow History Estimated by PCR-DGGE

Pedosphere ◽  
2009 ◽  
Vol 19 (2) ◽  
pp. 156-165 ◽  
Author(s):  
Guang-Hua WANG ◽  
Jian JIN ◽  
Jun-Jie LIU ◽  
Xue-Li CHEN ◽  
Ju-Dong LIU ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Natural Restoration ◽  
Bare Fallow

Changes in Bacterial Community Structure of Agricultural Land Due to Long-Term Organic and Chemical Amendments

2012 ◽  
Vol 64 (2) ◽  
pp. 450-460 ◽  
Author(s):  
Vasvi Chaudhry ◽  
Ateequr Rehman ◽  
Aradhana Mishra ◽  
Puneet Singh Chauhan ◽  
Chandra Shekhar Nautiyal
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Agricultural Land

scholarly journals Effect of long-term herbicide applications on the bacterial community structure and function in an agricultural soil

2003 ◽  
Vol 46 (2) ◽  
pp. 139-146 ◽  
Author(s):  
Dave Seghers ◽  
Kristof Verthé ◽  
Dirk Reheul ◽  
Robert Bulcke ◽  
Steven D Siciliano ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Agricultural Soil ◽  
Structure And Function ◽  
And Function

Effects of Long-Term Elevated CO2 on Rhizosphere and Bulk Soil Bacterial Community Structure in Pinus sylvestriformis Seedlings Fields

2011 ◽  
Vol 343-344 ◽  
pp. 351-356
Author(s):  
Xia Jia ◽  
Chun Juan Zhou
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Bacterial Community Structure ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Pinus Sylvestriformis ◽  
Soil Bacterial Community Structure ◽  
Gradient Gel Electrophoresis ◽  
Polymerase Chain

The effect of long-term elevated CO2(as open top chambers) on rhizosphere and bulk bacterial community structure in Pinus sylvestriformis seedlings field was investigated in July, August, and September. The bacterial communities were processed by Denaturing Gradient Gel Electrophoresis (DGGE) analysis of bacterial 16S rDNA fragments amplified by PCR (Polymerase Chain Reaction) from DNA extracted directly from soil. DGGE profiles from rhizosphere samples showed large changes in rhizosphere bacterial community under elevated CO2compared to ambient except for that in September. For bulk samples, bacterial community structure changed when exposed to elevated CO2in three months. With the exception of bulk samples in August, a similitude of bacterial communities structures existed between different elevated CO2concentrations by analyzing UPGMA dendrogram based on Jaccard’s coefficient.

scholarly journals Variation of rhizosphere bacterial community diversity in the desert ephemeral plant Ferula sinkiangensis across environmental gradients

2020 ◽  
Author(s):  
Zhang tao ◽  
Wang Zhongke ◽  
Lv Xinhua ◽  
Dang Hanli ◽  
Zhuang Li
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Bacterial Community Structure ◽  
Community Diversity ◽  
Bacterial Community Diversity ◽  
Physicochemical Factors ◽  
Rhizosphere Bacterial Community ◽  
Ferula Sinkiangensis ◽  
Rhizosphere Bacterial Communities

Ferula sinkiangensis is a desert short-lived medicinal plant, and its number is rapidly decreasing. Rhizosphere microbial community plays an important role in plant growth and adaptability. However, Ferula sinkiangensis rhizosphere bacterial communities and the soil physicochemical factors that drive the bacterial community distribution are currently unclear. On this study, based on high-throughput sequencing, we explored the diversity, structure and composition of Ferula sinkiangensis rhizosphere bacterial communities at different slope positions and soil depths and their correlation with soil physicochemical properties. Our results revealed the heterogeneity and variation trends of Ferula sinkiangensis rhizosphere bacterial community diversity and abundance on a fine spatial scale (Slope position and soil depth) and Found Actinobacteria (25.5%), Acidobacteria (16.9%), Proteobacteria (16.6%), Gemmatimonadetes (11.5%) and Bacteroidetes (5.8%) were the dominant bacterial phyla in Ferula sinkiangensi s rhizosphere soil. Among all soil physicochemical variables shown in this study, there was a strong positive correlation between phosphorus (AP) and the diversity of rhizosphere bacterial community in Ferula sinkiangensis . In addition, Soil physicochemical factors jointly explained 24.28% of variation in Ferula sinkiangensis rhizosphere bacterial community structure. Among them, pH largely explained the variation of Ferula sinkiangensis rhizosphere bacterial community structure (5.58%), followed by total salt (TS, 5.21%) and phosphorus (TP, 4.90%).

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