Antifungal activity of TiO2 photocatalysis against Penicillium expansum in vitro and in fruit tests
Antifungal activity of TiO2 photocatalysis against Penicillium expansum in vitro and in fruit tests
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DOI：
10.1016/j.ijfoodmicro.2005.08.018
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发表时间：
2006-03-15
影响因子：
5.4
通讯作者：
Hayata, Y
中科院分区：
文献类型：
--
作者：
Maneerat, C;Hayata, Y
研究了TiO2光催化剂粉末和涂膜对扩展青霉菌（Penicillium expansum）的抑菌活性。将扩展弯孢霉分生孢子悬浮液与二氧化钛粉末混合后，加入马铃薯葡萄糖琼脂（PDA）平板中进行离体培养试验。TiO2光催化反应降低了真菌病原菌的孢子萌发。结果发现，TiO2光催化反应抑制扩展青霉生长的能力与添加的TiO2的量相关。随着TiO2量的增加，观察到扩展青霉的活菌落数减少。无论哪种水果接种扩展青霉，二氧化钛粉末和二氧化钛涂层膜表现出抗真菌活性，以控制果实腐烂。TiO2光催化反应显著延缓了苹果青霉腐烂病的发展（P=0.05）。类似地，TiO2光催化反应是唯一的处理，其中在储存1周后没有番茄果实腐烂明显。二氧化钛涂层的薄膜也减少了柠檬的褐色病变和青霉腐烂感染。平均严重度果实腐烂评分（布朗宁和软化果肉）为3.2和1.9，分别为未涂布和TiO 2涂布膜。我们的研究结果表明，“二氧化钛光催化反应”显示抗真菌活性对扩展红曲霉，可能有潜在的采后病害控制。(c)2005 Elsevier B.V.保留所有权利。
The antifungal activity of TiO2 photocatalytic reaction in the form of TiO2 powder and TiO2 coated on a plastic film against Penicillium expansum was investigated in vitro and in fruit tests. The mixture of R expansum conidial suspension and TiO2 powder was added to potato dextrose agar (PDA) plates for vitro test. The TiO2 photocatalytic reaction reduced conidial germination of the fungal pathogen. It was found that the ability of the TiO2 photocatalytic reaction to suppress P. expansum growth correlated to the amount of TiO2 added. Lower numbers of viable colonies of P expansum were observed with increasing amount of TiO2. Regardless of the kind of selected fruit inoculated with P expansum, both TiO2 powder and TiO2-coated film exhibited antifungal activity to control fruit rot. Development of Penicillium rot in apple was significantly (P=0.05) retarded by the TiO2 photocatalytic reaction. Similarly the TiO2 photocatalytic reaction was the only treatment where no tomato fruit rot was noticeable after I week of storage. TiO2-coated film also decreased brown lesions and Penicillium rot infection in lemons. The mean severity fruit rot scores (browning and softening flesh) were 3.2 and 1.9 for uncoated and TiO2-Coated film, respectively. Our findings suggest that "TiO2 photocatalytic reaction" shows antifungal activity against R expansum which may have potential for postharvest disease control. (c) 2005 Elsevier B.V. All rights reserved.