1 College of Life Sciences, Shanxi Agricultural University, Jinzhong 030801, China
2 College of Agricultural Engineering, Shanxi Agricultural University, Jinzhong 030801, China
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Received
Published
Revised
2025-09-13
2026-08-18
2026-01-31
Online Date
2026-09-04
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摘要
为研究高压脉冲电场(pulsed electric field, PEF)与曲古抑菌素A(trichostatin A, TSA)协同处理对禾谷镰刀菌的抑制效果。以禾谷镰刀菌为材料,采用10 kV/cm PEF(脉宽99 μs,脉冲60次)联合不同浓度TSA(0、50、100、200、300 μmol/L)处理,通过测定菌落生长速率、产孢量及萌发率等指标评价协同抑菌效应。结果表明:PEF与TSA联合处理对菌丝生长及孢子萌发的抑制效果均随TSA浓度升高而增强,且显著高于同浓度TSA单独处理。在300 μmol/L TSA条件下,联合处理后对菌丝生长抑制率达51.47%,EC50由单独TSA处理的560.66 μmol/L降至239.75 μmol/L,杀菌效率提升2.34倍。联合处理7 h后,孢子萌发抑制率达71.99%,EC50下降至50.58 μmol/L,抑菌活性提升4.06倍,且孢子萌发进程推迟2 h。此外,在50 μmol/L TSA条件下,联合处理显著降低了病原菌的产孢量,降幅为47.37%。研究结果为开发物理-化学协同杀菌技术及玉米穗腐病的绿色防控提供了理论依据。
Abstract
To study the synergistic effect of pulsed electric field (PEF) and trichostatin A (TSA) on the growth and development of Fusarium graminearum, was treated with 10 kV/cm PEF (pulse width of 99 μs, pulse 60 times) combined with different concentrations of TSA (0, 50, 100, 200, 300 μmol/L). The synergistic antibacterial effect was evaluated by measuring colony growth rate, sporulation and germination rate. The results showed that the inhibitory effects of PEF and TSA combined treatment on mycelial growth and spore germination were enhanced with the increase of TSA concentration, and were significantly higher than those of TSA alone at the same concentration. At 300 μmol/L TSA, the inhibition rate of mycelium growth after combined treatment reached 51.47%, and the EC50 value decreased from 560.66 μmol/L of TSA alone to 239.75 μmol/L, and the bactericidal efficiency increased by 2.34 times. After combined treatment for 7 h, the spore germination inhibition rate reached 71.99%, the EC50 value decreased to 50.58 μmol/L, the antibacterial activity increased by 4.06 times, and the spore germination process was delayed by 2 h. In addition, under the condition of 50 μmol/L TSA, the combined treatment significantly reduced the spore production of the pathogen by 47.37%. This result provides a theoretical basis for the development of physical-chemical synergistic sterilization technology and the green control of corn ear rot disease.
ZHANG Yun-qing, ZHANG Meng-yuan, LIU Zhen-yu, SONG Yan-bo, LU Yuan-yuan.
Synergistic Effect of Pulsed Electric Field and Trichostatin A on Growth and Development of Fusarium graminearum[J].
Science Technology and Engineering, 2026, 26(23): 9821-9829 DOI:10.12404/j.issn.1671-1815.2506611
高压脉冲电场(pulsed electric field,PEF)作为一种新型冷杀菌方式,具有杀菌高效彻底、耗能低、价格低廉、无污染等优点,已被广泛应用于物质提取、食品干燥和杀菌等领域。PEF可在微秒级时间内诱导微生物细胞膜电穿孔,导致细胞内容物泄露,进而扰乱细胞稳态并诱导凋亡,实现物理杀菌。已有研究表明,PEF对大肠杆菌[9]、沙门氏菌[10]及金黄色葡萄球菌[11]等细菌具有一定的杀菌作用。针对真菌,李光[12]采用25 kV/cm的PEF处理尖孢镰刀菌,使得尖孢镰刀菌的灭活率达到76.02%;Prusova等[13]将大麦人工接种四种镰刀菌属真菌,在施加不同强度PEF处理后发现其能够大幅度减少镰刀菌的生长和霉菌毒素的产生。Behner等[14]进一步深入研究,发现PEF处理可改变镰刀菌属真菌的代谢组,并降低其产毒性。因此,PEF在病原菌防控中具有广阔应用前景。
取直径为10 mm CK组和PEF组菌株菌饼,分别接种在含有不同浓度TSA的MM培养基中,25 ℃光照培养15 d。待产孢后,加入5 mL 1%葡萄糖溶液刮取孢子,3层擦镜纸过滤,振荡器充分混匀后,用血球计数板[27]测定分生孢子悬浮液的浓度,根据式(3)、式(4)计算每个培养皿产生的分生孢子的总量。每个平板随机测定10次,实验重复3次。
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