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- Intestinal Lactobacillus community structure and its correlation with diet of Southern Chinese elderly subjects§
- Yuanyuan Pan , Da-Wen Sun , Quanyang Li
- J. Microbiol. 2016;54(9):594-601. Published online August 31, 2016
- DOI: https://doi.org/10.1007/s12275-016-6131-7
- 47 View
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- 8 Crossref
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Abstract
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This study aimed to investigate the relationship between the
intestinal Lactobacillus species and diet of elderly subjects in
a longevity area in Southern China. Healthy elderly subjects
ranging from 80 to 99 years old were respectively selected
from the regions of Bama and Nanning, Guangxi, China.
The nested polymerase chain reaction and denaturing gradient
gel electrophoresis (PCR-DGGE) technology was used
to analyze the intestinal Lactobacillus community structure.
Results
showed that Weissella confusa, L. mucosae, L. crispatus, L. salivarius, and L. delbrueckii were the representative Lactobacillus of elderly subjects. Among them, L. crispatus and L. delbrueckii were the dominant Lactobacillus of all species. In comparison to Nanning elderly subjects, the detection frequencies of W. confusa and L. salivarius were significantly increased in Bama elderly subjects (P < 0.01), whereas L. mucosae was significantly decreased (P < 0.01). Interestingly, it was also found that there were 4 kinds of representative Lactobacillus, which were significantly correlated with dietary fiber. W. confusa (P < 0.01) and L. salivarius (P < 0.05) were significantly positively correlated with the intake of dietary fiber, while L. mucosae (P < 0.01) and L. crispatus (P < 0.05) were significantly negatively correlated with the intake of dietary fiber, respectively. Results confirmed that different diets had obvious effects on the intestinal Lactobacillus community structure of elderly subjects in Southern China, which may provide a certain theoretical basis for the elderly’s healthy food strategic design and probiotics product development. -
Citations
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- Detecting Nonculturable Bacteria in the Active Mycorrhizal Zone of the Pine Mushroom Tricholoma matsutake
- Ryota Kataoka , Zaki Anwar Siddiqui , Junichi Kikuchi , Masaki Ando , Rina Sriwati , Ai Nozaki , Kazuyoshi Futai
- J. Microbiol. 2012;50(2):199-206. Published online April 27, 2012
- DOI: https://doi.org/10.1007/s12275-012-1371-7
- 36 View
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- 36 Scopus
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Abstract
-
The fungus Tricholoma matsutake forms an ectomycorrhizal
relationship with pine trees. Its sporocarps often develop in a
circle, which is commonly known as a fairy ring. The fungus
produces a solid, compact, white aggregate of mycelia and
mycorrhizae beneath the fairy ring, which in Japanese is
called a ‘shiro’. In the present study, we used soil dilution
plating and molecular techniques to analyze the bacterial
communities within, beneath, and outside the T. matsutake
fairy ring. Soil dilution plating confirmed previous reports
that bacteria and actinomycetes are seldom present in the
soil of the active mycorrhizal zone of the T. matsutake shiro.
In addition, the results showed that the absence of bacteria
was strongly correlated with the presence of T. matsutake
mycorrhizae. The results demonstrate that bacteria, especially
aerobic and heterotrophic forms, and actinomycetes,
are strongly inhibited by T. matsutake. Indeed, neither bacteria
nor actinomycetes were detected in 11.3% of 213 soil
samples from the entire shiro area by culture-dependent
methods
. However, molecular techniques demonstrated that some bacteria, such as individual genera of Sphingomonas and Acidobacterium, were present in the active mycorrhizal zone, even though they were not detected in soil assays using the dilution plating technique.
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