scholarly journals Effects of Sphaeropsis Blight on Rhizosphere Soil Bacterial Community Structure and Soil Physicochemical Properties of Pinus sylvestris var. mongolica in Zhanggutai, China

Forests ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 954
Author(s):  
Saiyaremu Halifu ◽  
Xun Deng ◽  
Xiaoshuang Song ◽  
Yuning An ◽  
Ruiqing Song
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Pinus Sylvestris ◽  
Physicochemical Properties ◽  
Bacterial Community Structure ◽  
Rhizosphere Soil ◽  
Liaoning Province ◽  
Soil Physicochemical Properties ◽  
Α Diversity ◽  
Significant Difference

Pinus sylvestris var. mongolica is an important tree species for ecological construction and environmental restoration owing to its rapid growth rate and excellent stress resistance. Pinus sylvestris var. mongolica sphaeropsis blight is a widespread disease caused by Sphaeropsis sapinea. This study was focused on non-infected (CK) and infected (SS) Pinus sylvestris var. mongolica plants in Zhanggutai area, Liaoning Province, China. Illumina high-throughput sequencing based on the templates of sequencing-by-synthesis working with reversible terminators is a widely used approach. In the present study, systematic differences in relationships among rhizosphere soil physicochemical properties, bacterial community structure, diverse bacterial genera, and alpha diversity indices between the two categories were evaluated. The current findings are as follows: (1) Shannon’s index of SS soil was significantly higher than CK, and it was significantly lower in May than July and September (p < 0.05). (2) Non-metric multidimensional scaling (NMDS) showed a difference in bacterial community structure during May (spring), July (summer), and September. (3) At the phylum level, no significant difference was found in the bacterial genera between CK and SS soil for three seasons; however, at the genus level, there were about 19 different bacterial genera. The correlation studies between 19 different bacterial genera and environmental factors and α-diversity indicated that bacterial genera of non-infected and infected Pinus sylvestris var. mongolica were distributed differently. The bacterial genera with CK were positively correlated with soil physicochemical properties, while a negative correlation was found for SS. In conclusion, the differences in nutrient and microbial community structure in the rhizosphere soil of Pinus sylvestris var. mongolica are the main causes of shoot blight disease.

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

2019 ◽  
Author(s):  
Zhang Tao ◽  
Dang Han Li ◽  
Wang Zhong Ke ◽  
Lv Xin Hua ◽  
Zhuang Li
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Physicochemical Properties ◽  
Bacterial Community Structure ◽  
Soil Depth ◽  
Community Diversity ◽  
Slope Position ◽  
Soil Physicochemical Properties ◽  
Rhizosphere Bacterial Community ◽  
Ferula Sinkiangensis

Abstract Background Ferula sinkiangensis is a desert short-lived medicinal plant, and its number is rapidly decreasing. Rhizosphere microbial community plays an important role in regulating global biogeochemical cycle, plant growth and adaptability. However, the Ferula sinkiangensis bacterial community and the processes that drive its assembly remain unclear. Results In this study, based on Illumina HiSeq high-throughput sequencing, we explored the diversity, structure and composition of Ferula sinkiangensis rhizosphere bacterial communities at different slope positions (upper, middle and bottom) and soil depths (0-10 cm, 10-25 cm, 25-40 cm) and their correlation with soil physicochemical properties. Actinobacteria (22.7%), Proteobacteria (18.6%), Acidobacteria (14.0%), Gemmatimonadetes (10.1%), Cyanobacteria (7.9%), Bacteroidetes (6.9%), Planctomycetes (3.9%), Verrucomicrobia (3.5%), Firmicutes (3.4%) and Chloroflexi (3.2%) were the dominant bacterial phyla in Ferula sinkiangensis rhizosphere soil. Variance analysis showed that the diversity and abundance of rhizosphere bacterial community in Ferula sinkiangensis were significantly different at various slope positions and soil depths. Specifically, the diversity of bacterial community was significantly higher at the top than the bottom of the slope, and the diversity and richness of bacterial community were significantly greater in the 0-10cm than the 25-40cm soil layer. Linear discriminant effect size (LEfSe) analysis showed the specific phyla and genera of bacteria affected by slope position and soil depth. For example, Planctomycetes, Sphingomonas , Rubrobacter and Adhaeribacter by slope position and significant impact on soil depth. In addition, distance-based redundancy analysis (db-RDA) and variance analysis showed that soil physicochemical factors jointly explained 29.81% of variation in Ferula sinkiangensis rhizosphere bacterial community structure. There was a significant positive correlation between available phosphorus（AP）and the diversity of Ferula sinkiangensis rhizosphere bacterial community ( p < 0.01), whereas pH largely explained the variation of Ferula sinkiangensis rhizosphere bacterial community structure (5.58%, p < 0.01), followed by altitude (5.53%), total salt (TS, 5.21%) and total phosphorus (TP, 4.90%). Conclusion 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 depth) and shed new light on the interaction mechanisms between Ferula sinkiangensis rhizosphere bacterial community and soil physicochemical properties.

Characterization of Bacterial Community Structure in Rhizosphere Soil of Grain Legumes

2005 ◽  
Vol 49 (3) ◽  
pp. 407-415 ◽  
Author(s):  
S. Sharma ◽  
M.K. Aneja ◽  
J. Mayer ◽  
J.C. Munch ◽  
M. Schloter
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Rhizosphere Soil ◽  
Grain Legumes

scholarly journals Comparison of Community and Function of Dissimilatory Nitrate Reduction to Ammonium (DNRA) Bacteria in Chinese Shallow Lakes with Different Eutrophication Degrees

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 174 ◽  
Author(s):  
Xiaowen Li ◽  
Chunlei Song ◽  
Zijun Zhou ◽  
Jian Xiao ◽  
Siyang Wang ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Shallow Lakes ◽  
Nitrate Reduction ◽  
Bacterial Community Structure ◽  
Physical Parameters ◽  
Lake Chaohu ◽  
Lake Ecosystems ◽  
Dissimilatory Nitrate Reduction ◽  
Significant Difference

Dissimilatory nitrate reduction to ammonium (DNRA) plays an important role in controlling nitrogen (N) loading in lake ecosystems. However, studies on the linkage between DNRA bacterial community structure and lake eutrophication remain unclear. We examined the community and abundance of DNRA bacteria at six basins of four shallow lakes with different degrees of eutrophication in China. Measurements of the different forms of N and phosphorus (P) in the water column and interstitial water as well as total organic carbon (TOC) and sulfide in the sediments in summer (July 2016) were performed. The nutritional status of Lake Chaohu was more serious than that of the lakes in Wuhan, including Lake Qingling, Lake Houguan, and Lake Zhiyin by comparing geochemical and physical parameters. We found a higher abundance of the nrfA gene, which is a function gene of DNRA bacteria in sediments with higher contents of TOC and sulfide. Moreover, nitrate was a significant factor influencing the DNRA bacterial community structure. A significant difference of the DNRA bacterial community structure between Lake Chaohu and the lakes in Wuhan was discovered. Furthermore, DNRA bacterial abundance and community positively correlated with NH4+ and Chl a concentrations in Lake Chaohu, in which a percent abundance of dominant populations varied along eutrophication gradients. Overall, the abundance and community structure of the DNRA bacteria might be important regulators of eutrophication and cyanobacteria bloom in Lake Chaohu.

scholarly journals Difference in Rhizosphere Soil Bacterial Community was among Six Cinnamomum camphora Chemotypes

2021 ◽  
Author(s):  
Zufei Xiao ◽  
Beihong Zhang ◽  
Yangbao Wang ◽  
Zhinong Jin ◽  
Feng Li ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Bacterial Community Structure ◽  
Rhizosphere Soil ◽  
Soil Nutrient ◽  
Soil Bacterial Community ◽  
Cinnamomum Camphora ◽  
Close Relationship ◽  
Soil Bacterial

Abstract: Plant types and soil bacterial communities had a close relationship, understanding the profound association between them contributes to better learn bacterial ecological function for plant growth. In this study, rhizosphere soil of six different chemotype Cinnamomum camphora trees were collected, including C. bodinieri var. citralifera, [C. camphora (Linn.) Presl], camphora-type, cineole-type, linalool-type and isoborneol-type. Soil properties content and bacterial communities were analyzed. Two chemotype C. camphora, including [C. camphora (Linn.) Presl] and linalool-type, shaped similar bacterial community structure, decreased Firmcutes relative abundance. richness estimators (Chao1 index and Ace index) of [C. camphora (Linn.) Presl] were decreased compared with the others. Furthermore, soil bacterial community structure was also similar among bodinieri var. citralifera, camphora-type, cineole-type and isoborneol-type. Hence, different chemotype C. camphora altered soil nutrient and shaped rhizosphere bacterial communities.

Sign in / Sign up

Export Citation Format

Share Document