文献类型： 外文期刊

作者： DAI, GH ¹ ; ANDARY, C ² ; MONDOLOTCOSSON, L ² ; BOUBALS, D ² ;

作者机构： 1.FAC PHARM MONTPELLIER,BOT PHYTOCHIM & MYCOL LAB,F-34060 MONTPELLIER 1,FRANCE

2.FAC PHARM MONTPELLIER,BOT PHYTOCHIM & MYCOL LAB,F-34060 MONTPELLIER 1,FRANCE; HEBEI ACAD AGR & FORESTRY SCI,PLANT STRESS & PHYSIOL LAB,SHIJIAZHUANG 050051,PEOPLES R CHINA; ENSAM,VITICULTURE LAB,F-34060 MONTPELLIER,FRANCE

关键词： DOWNY MILDEW

期刊名称：PHYTOPATHOLOGY （ 影响因子：4.025； 五年影响因子：4.394 ）

ISSN： 0031-949X

年卷期： 1995 年 85 卷 2 期

页码：

收录情况： SCI

摘要： Leaves excised from in vitro plantlets of Vitis vinifera 'Grenache' (susceptible, S), V. rupestris'du Lot'(intermediate, M), and V. rotundifolia 'Carlos' (resistant, R) were inoculated with sporangia of Plasmopara viticola and examined microscopically after they were stained with a series of reagents. These three cultivars showed necrotic spots without sporulation (R); diffuse necrosis with limited sporulation and short, highly branched aerial hyphae (M); and no visible necrosis with heavy sporulation and long aerial parasite hyphae (S). During histochemical studies, a blue autofluorescence (trans-resveratrol) was detected at 1 day on R, at 2 days on M, but not at all on S. Flavonoids were present at 2 days on R but at 8 days on M and at 12 days on S. These data suggest that the presence of trans-resveratrol and flavonoids in the resistant cultivar at a very early stage of infection may play an important role in inhibiting growth of the fungus. Moreover, on the intermediate cultivar, the peroxidase activity, catechins, and lignins appeared at a late stage of infection. The production of these molecules seems to restrict the development of this pathogen. In the susceptible cultivar, these reactions presumably were too late and too weak to limit development of the fungus.