Welcome to Acta Prataculturae Sinica ! Today is Share:

Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (6): 106-120.DOI: 10.11686/cyxb2020244

Previous Articles     Next Articles

Effects of storage time on fungal and mycotoxin contamination of naked oat seeds

Xiu-mei NIE1(), Ping MU2(), Gui-qin ZHAO1, Hai-peng HE1, Wen-bin WU1, Dou-dou LIN1, Wei-juan SU1, Li-rui ZHANG1   

  1. 1.College of Pratacultural Science,Gansu Agricultural University,Lanzhou 730070,China
    2.College of Agronomy Science,Gansu Agricultural University,Lanzhou 730070,China
  • Received:2020-05-26 Revised:2020-08-19 Online:2021-05-21 Published:2021-05-21
  • Contact: Ping MU

Abstract:

The aim of this study was to determine the effect of storage time on fungal and mycotoxin contamination of naked oat seeds. Three naked oat varieties were stored in the same environment, and were tested at 1, 2, 3, and 5 years of storage to determine which fungi and mycotoxins were present. The results showed that the amount of fungi generally decreased as the storage period extended. The amount of spores ranged from 0.60 to 8.40 cfu per grain and the fungal infection rate ranged from 2.75% to 28.50%. The species of fungi and isolation rates of the same species varied significantly with storage time, and also differed among the oat varieties. A total of 33 species of fungi in 17 genera were detected from oat seeds. The dominant genera were AspergillusPenicillium, and Alternaria, and the dominant species varied with storage time and among the naked oat varieties. The mycotoxin content first increased and then decreased as the storage period extended. Among the three mycotoxins detected, tenuazonic acid showed the highest concentrations (range, 16.88-348.67 μg·kg-1) and citrinin showed the lowest concentrations (0.01-1.04 μg·kg-1). In conclusion, the duration of storage significantly affected the amount of fungi and mycotoxins in naked oats.

Key words: naked oat, storage years, seed borne fungi, mycotoxins