Analysis of Internal and External Microorganism Community of Wild Cicada Flowers and Identification of the Predominant Cordyceps cicadae Fungus

The parasitoid fungus Cordyceps cicadae, whose fruiting bodies are known in China as “chan hua,” literally “cicada flower,” has been used as a traditional Chinese medicinal ingredient for centuries. However, systematic disclosure of the vital factors responsible for the formation of wild cicada flow...

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Autores principales: Ailin Huang, Tao Wu, Xiuyun Wu, Biao Zhang, Yuanyuan Shen, Suying Wang, Wenjun Song, Haihua Ruan
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Publicado: Frontiers Media S.A. 2021
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spelling oai:doaj.org-article:129d3d5c2cc545318fe2b570b2d36ae92021-12-01T01:27:06ZAnalysis of Internal and External Microorganism Community of Wild Cicada Flowers and Identification of the Predominant Cordyceps cicadae Fungus1664-302X10.3389/fmicb.2021.752791https://doaj.org/article/129d3d5c2cc545318fe2b570b2d36ae92021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmicb.2021.752791/fullhttps://doaj.org/toc/1664-302XThe parasitoid fungus Cordyceps cicadae, whose fruiting bodies are known in China as “chan hua,” literally “cicada flower,” has been used as a traditional Chinese medicinal ingredient for centuries. However, systematic disclosure of the vital factors responsible for the formation of wild cicada flower is limited. Here, we determined the physicochemical properties of soil and simultaneously analyzed the diversities and the structures of microbial community inhabiting the coremia, sclerotia, and soil around wild cicada flowers through high-throughput sequencing. Our results indicated that cicada flower more preferentially occurred in acidic soil (pH 5.9) with abundant moisture content (MC), total nitrogen (TN), and organic matter (OM). The dominant fungal genera in soil mainly included Isaria, f__Clavariaceae_Unclassified, Umbelopsis, f__Chaetomiaceae_Unclassified, Mortierella, f__Sordariaceae_Unclassified, and Arcopilus. Among them, C. cicadae was the only fungus that was massively detected in both the coremia and sclerotia with abundance of 83.5 and 53.6%, respectively. Based on this, a C. cicadae strain named AH10-4 with excellent adenosine- and N6-(2-hydroxyethyl)-adenosine (HEA)-producing capability was successfully isolated. However, to the aspect of bacteria, Burkholderia–Caballeronia–Paraburkholderia, Bacillus, Acidibacter, f__Xanthobacteraceae_Unclassified, and Candidatus_Solibacter were the dominant genera in soil. Pedobacter, f__Enterobacteriaceae_Unclassified, Pandoraea, Achromobacter, Stenotrophomonas, Burkholderia–Caballeronia–Paraburkholderia, and Chitinophaga were the dominant genera in the coremia and sclerotia. Notably, Burkholderia–Caballeronia–Paraburkholderia was the shared bacteria among them with high abundance of 3.1, 11.4, and 5.2% in the sclerotia, coremia, and soil, respectively. However, the possible role of these bacteria to the occurrence of cicada flower has been unclear to our knowledge. By analyzing the correlation between physicochemical properties and microbial community of soil, we found that MC, Fe, and Zn were significantly negatively correlated with soil Isaria and that Cu was significantly negatively correlated with most dominant soil bacterial genera. But Mg was significantly positively correlated with most dominant taxa. This study provides new insight into the formation mechanisms of cicada flower and may contribute to the large-scale cultivation of cicada flowers.Ailin HuangTao WuXiuyun WuBiao ZhangYuanyuan ShenSuying WangWenjun SongHaihua RuanFrontiers Media S.A.articleadenosineartificial cultivationmicrobial communityN6-(2-hydroxyethyl)-adenosinesoil physicochemical propertiesMicrobiologyQR1-502ENFrontiers in Microbiology, Vol 12 (2021)
institution DOAJ
collection DOAJ
language EN
topic adenosine
artificial cultivation
microbial community
N6-(2-hydroxyethyl)-adenosine
soil physicochemical properties
Microbiology
QR1-502
spellingShingle adenosine
artificial cultivation
microbial community
N6-(2-hydroxyethyl)-adenosine
soil physicochemical properties
Microbiology
QR1-502
Ailin Huang
Tao Wu
Xiuyun Wu
Biao Zhang
Yuanyuan Shen
Suying Wang
Wenjun Song
Haihua Ruan
Analysis of Internal and External Microorganism Community of Wild Cicada Flowers and Identification of the Predominant Cordyceps cicadae Fungus
description The parasitoid fungus Cordyceps cicadae, whose fruiting bodies are known in China as “chan hua,” literally “cicada flower,” has been used as a traditional Chinese medicinal ingredient for centuries. However, systematic disclosure of the vital factors responsible for the formation of wild cicada flower is limited. Here, we determined the physicochemical properties of soil and simultaneously analyzed the diversities and the structures of microbial community inhabiting the coremia, sclerotia, and soil around wild cicada flowers through high-throughput sequencing. Our results indicated that cicada flower more preferentially occurred in acidic soil (pH 5.9) with abundant moisture content (MC), total nitrogen (TN), and organic matter (OM). The dominant fungal genera in soil mainly included Isaria, f__Clavariaceae_Unclassified, Umbelopsis, f__Chaetomiaceae_Unclassified, Mortierella, f__Sordariaceae_Unclassified, and Arcopilus. Among them, C. cicadae was the only fungus that was massively detected in both the coremia and sclerotia with abundance of 83.5 and 53.6%, respectively. Based on this, a C. cicadae strain named AH10-4 with excellent adenosine- and N6-(2-hydroxyethyl)-adenosine (HEA)-producing capability was successfully isolated. However, to the aspect of bacteria, Burkholderia–Caballeronia–Paraburkholderia, Bacillus, Acidibacter, f__Xanthobacteraceae_Unclassified, and Candidatus_Solibacter were the dominant genera in soil. Pedobacter, f__Enterobacteriaceae_Unclassified, Pandoraea, Achromobacter, Stenotrophomonas, Burkholderia–Caballeronia–Paraburkholderia, and Chitinophaga were the dominant genera in the coremia and sclerotia. Notably, Burkholderia–Caballeronia–Paraburkholderia was the shared bacteria among them with high abundance of 3.1, 11.4, and 5.2% in the sclerotia, coremia, and soil, respectively. However, the possible role of these bacteria to the occurrence of cicada flower has been unclear to our knowledge. By analyzing the correlation between physicochemical properties and microbial community of soil, we found that MC, Fe, and Zn were significantly negatively correlated with soil Isaria and that Cu was significantly negatively correlated with most dominant soil bacterial genera. But Mg was significantly positively correlated with most dominant taxa. This study provides new insight into the formation mechanisms of cicada flower and may contribute to the large-scale cultivation of cicada flowers.
format article
author Ailin Huang
Tao Wu
Xiuyun Wu
Biao Zhang
Yuanyuan Shen
Suying Wang
Wenjun Song
Haihua Ruan
author_facet Ailin Huang
Tao Wu
Xiuyun Wu
Biao Zhang
Yuanyuan Shen
Suying Wang
Wenjun Song
Haihua Ruan
author_sort Ailin Huang
title Analysis of Internal and External Microorganism Community of Wild Cicada Flowers and Identification of the Predominant Cordyceps cicadae Fungus
title_short Analysis of Internal and External Microorganism Community of Wild Cicada Flowers and Identification of the Predominant Cordyceps cicadae Fungus
title_full Analysis of Internal and External Microorganism Community of Wild Cicada Flowers and Identification of the Predominant Cordyceps cicadae Fungus
title_fullStr Analysis of Internal and External Microorganism Community of Wild Cicada Flowers and Identification of the Predominant Cordyceps cicadae Fungus
title_full_unstemmed Analysis of Internal and External Microorganism Community of Wild Cicada Flowers and Identification of the Predominant Cordyceps cicadae Fungus
title_sort analysis of internal and external microorganism community of wild cicada flowers and identification of the predominant cordyceps cicadae fungus
publisher Frontiers Media S.A.
publishDate 2021
url https://doaj.org/article/129d3d5c2cc545318fe2b570b2d36ae9
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