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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (2): 123-132.doi: 10.11924/j.issn.1000-6850.casb2024-0100

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Isolation and Identification of Culturable Intestinal Bacteria of Holotrichia scrobiculata Brenske Feeding on Ginkgo biloba

CHEN Jie1(), LONG Ting1, CAO Yirong1, SUN Ganlin1, WANG Wenqian1, SHEN Kaiyuan2, JIN Sitong1, CAI Haosheng1, CHEN Bin1()   

  1. 1 College of Plant Protection, Yunnan Agricultural University / State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Kunming 650201
    2 Yunnan Ximeikang Agricultural Development Co., Ltd, Qujing, Yunnan 655500
  • Received:2024-02-06 Revised:2024-06-03 Online:2025-01-13 Published:2025-01-13

Abstract:

Isolation and identification of culturable bacteria in the intestinal tract of Holotrichia scrobiculata Brenske adults feeding on Ginkgo biloba leaves provided a theoretical basis for the study of host adaptability mechanism and comprehensive prevention and control of Holotrichia scrobiculata Brenske. The intestinal culturable bacteria of female and male adults of Holotrichia scrobiculata Brenske feeding on Ginkgo biloba leaves were isolated, cultured and identified by LB, NA and TYA medium, combined with 16S rDNA sequence analysis, to explore the species diversity of intestinal culturable bacteria of Holotrichia scrobiculata Brenske feeding on Ginkgo biloba leaves. The composition and structure of culturable bacteria in the intestinal tract of female and male adults were different. There were 4 phyla, 11 families, 13 genera and 14 species of culturable bacteria in the intestinal tract of female adults. The dominant phylum, family, genus and species of bacteria were Firmicutes, Bacillaceae, Bacillus and Bacillus subtilis, with abundances of 86.58%, 86.56%, 62.59% and 61.64%, respectively. There were 3 phyla, 6 families, 7 genera and 11 species of culturable bacteria in the intestinal tract of male adults. The dominant phyla, families, genera and species were Firmicutes, Bacillaceae, Pediococcus and Pediococcuspentosaceus, with abundances of 98.64%, 37.74%, 34.68% and 34.68%, respectively. From the perspective of dominant bacteria, the dominant bacteria in the female intestinal tract were Bacillus subtilis, with an abundance of 61.64%, while the dominant bacteria in the male intestinal tract were Bacillus altitudinis and Pediococcuspentosaceus, with relative abundances of 31.91% and 34.68%, respectively. Pediococcuspentosaceus and Sphingomonas humi were the two common culturable bacteria in the intestines of female and male adults. The diversity of culturable bacterial species in the intestinal tract of Holotrichia scrobiculata Brenske adults feeding on Ginkgo biloba leaves was rich. The composition of intestinal bacterial species varied with the gender of female and male, and the dominant species were also different.

Key words: Holotrichia scrobiculata Brenske, Ginkgo biloba, intestinal bacteria, culturable bacteria, 16S rDNA sequence, species diversity