Antifungal activity of some Moroccan plants against Geotrichum candidum, the causal agent of postharvest citrus sour rot
- 作者：I. Talibi ; L. Askarne ; H. Boubaker ; hassanboubaker@yahoo.fr ; E.H. Boudyach ; F. Msanda ; B. Saadi ; A. Ait Ben Aoumar
- 关键词：Antifungal activity ; Sour rot ; Plant extracts ; Geotrichum candidum ; Citrus fruit
- 刊名：Crop Protection
- 出版年：2012
- 期刊代码：28_02612194
- 类别：abs
- 出版时间：May, 2012
- 卷：35
- 期：Complete
- 页码：41-46
- 文件大小：239 K
摘要
The powders and aqueous extracts of 43 plant species, harvested in different regions of southern Morocco, were screened for their in vitro and in vivo antifungal activity against Geotrichum candidum, the cause of citrus sour rot. Our results show that among the 43 plants tested, the powders of Rubus ulmifolius, Ceratonia siliqua, Cistus monspeliensis and Halimium umbellatum plants totally inhibited mycelial growth of G.聽candidum. Furthermore, the powders of Cistus villosus, Pistacia atlantica, Halimium antiatlanticum, Inula viscosa, Ighermia pinifolia and Hammada scoparia plants are also effective against G.聽candidum with a percent of inhibition of mycelial growth higher than 80%. The effect of plant aqueous extracts on spore germination varied significantly (P聽<聽0.05) between tested plants. Aqueous extracts from H.聽antiatlanticum and C.聽villosus plants showed the strongest activity. The first species completely inhibited the spore germination at 2.5 and 5聽mg聽ml鈭?, and the second species at 5聽mg聽ml鈭?. The most active plants in in聽vitro studies were tested in聽vivo against sour rot on citrus fruit. Incidence of sour rot was lowered to 44.44 and 46.30%when mandarin fruit were treated with C.聽villosus and H.聽antiatlanticum aqueous extracts, compared with 98.15%in the control. This study demonstrates that plants extracts have a high potential to control sour rot of citrus. Such natural products therefore represent a sustainable alternative to the use of chemical pesticides.