柠檬醛熏蒸对互隔交链孢生长及其产毒的抑制作用

Effects of citral fumigation on suppressing the growth and mycotoxin production of Alternaria alternata

互隔交链孢是一种重要的能产生交链孢酚(AOH)等真菌毒素的植物病原菌。精油是重要的抑制病原菌侵染的挥发性植物提取物,其活性组分包括柠檬醛等。本研究表明柠檬醛可高效地抑制互隔交链孢的生长和AOH毒素的产生。柠檬醛熏蒸能够引起互隔交链孢菌丝断裂影响其延伸,而对其分生孢子结构的影响不明显。柠檬醛能够引起互隔交链孢活性氧生成的紊乱,这可能是导致AOH显著下降的原因之一。由于柠檬醛能高效抑制互隔交链孢生长和产毒,因此其可作为传统熏蒸剂的潜在替代品,以防控互隔交链孢引起的病害以及毒素污染。柠檬醛抑制互隔交链孢生长产毒的研究为其开发与应用奠定了良好的基础。

Alternaria alternata is an important phytopathogen producing a variety of mycotoxins,such as alternariol(AOH).Essential oils are the important volatile plant extracts that could suppress the pathogenic infection.The active components of essential oils include citral and other compounds.The results of this study showed that citral could effectively inhibit the growth of A.alternata and AOH production.Citral fumigation could lead to the fracture of hyphae and affecting their elongation,but had no obvious effect on the conidial structure.Citral could disturb the generation of reactive oxygen species in A.alternata,resulting in significant reduction of AOH production.Citral could be a potential alternative of traditional fumigant to control the disease and mycotoxin contamination induced by A.alternata.The study provides a new way for the development and application of citral.