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Acta Prataculturae Sinica ›› 2025, Vol. 34 ›› Issue (11): 98-113.DOI: 10.11686/cyxb2025052

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Identification and analysis of culturable endophytic fungi from quinoa seeds

Nan QIN1,2(), Rui-peng CAO1, Jing-han GAO1, Yu-fei PENG1, Miao TIAN1, Hong LYU1,2, Lu REN1,2, Hui YIN1,2(), Xiao-jun ZHAO1,2()   

  1. 1.College of Plant Protection,Shanxi Agricultural University,Taiyuan 030031,China
    2.Shanxi Key Laboratory of Integrated Pest Management in Agriculture,Taiyuan 030031,China
  • Received:2025-02-25 Revised:2025-04-15 Online:2025-11-20 Published:2025-10-09
  • Contact: Hui YIN,Xiao-jun ZHAO

Abstract:

Quinoa (Chenopodium quinoa) is a newly introduced crop in China, and it is attracting much interest because of its high nutritional value. In this study, we aimed to clarify the population structure and functional characteristics of endophytic fungi in quinoa seeds. Culturable endophytic fungi were isolated from seeds of four varieties of quinoa. The fungi were cultured, identified on the basis of morphological and phylogenetic analyses, and their pathogenicity and antifungal effects were explored. In total, nine culturable endophytes were isolated from the quinoa seeds. They comprised nine species of six genera, namely, Alternaria alternataAspergillus flavusAspergillus sydowiiFusarium boothiiFusarium clavumNeocamarosporium betaeNeocamarosporium chenopodiiPenicillium oxalicum, and Talaromyces stollii. A. alternata was present in seeds of all four varieties, and had the highest isolation frequency (64.42%). The fungi with the next highest isolation frequencies were A. flavus and P. oxalicum (11.66% and 9.20%, respectively). Among the nine culturable endophytic fungi, five (F. boothiiF. clavumA. alternataN. chenopodii, and N. betae) were able to infect quinoa leaves, and two (P. oxalicum and T. stollii) showed inhibitory effects against quinoa pathogens (BotrytiscinereaAscochytacaulinaFusariumcitriA. alternataTrichotheciumroseum). The culturable endophytic fungi in quinoa seeds showed a rich population structure and have potential applications in the biological control of plant diseases.

Key words: quinoa, culturable endophytic fungi, population, phylogeny