文献类型： 外文期刊

作者： Dai, GH ¹ ; Nicole, M ² ; Andary, C ² ; Martinez, C ² ; Bresson, E ² ; Boher, B ² ; Daniel, JF ² ; Geiger, JP ³ ;

作者机构： 1.ORSTOM,PHYTOPATHOL LAB,F-34032 MONTPELLIER,FRANCE

2.ORSTOM,PHYTOPATHOL LAB,F-34032 MONTPELLIER,FRANCE; HEBEI ACAD AGR & FORESTRY SCI,LAB PLANT STRESS PHYSIOL,SHIJIA ZHUANG 050051,HEBEI,PEOPLES R CHINA

3.ORSTOM,PHYTOPATHOL LAB,F-34032 MONTPELLIER,FRANCE; HEBEI ACAD AGR & FORES

关键词： Hypersensitively necrotic cells;Bacterial blight;Plasmopara viticola;Hydrogen peroxide;Vitis vinifera;Host tissues;Plant cells;Leaves;Phytoalexins;Resistance

期刊名称：PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY （ 影响因子：2.747； 五年影响因子：2.388 ）

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收录情况： SCI

摘要： Interactions between cotton cotyledons and Xanthomonas campestris pv. malvacearum were examined. During an incompatible interaction, fluorescence microscopy revealed that flavonoid compounds accumulated within 10 h after inoculation. Electron micrographs showed ultrastructural modifications of cells that exhibited an intense fluorescence suggesting the presence of flavonoids. Phenol-like molecules were produced by cells of infection sites and were found in paramural areas within papillae enriched with callose and in host cell walls and middle lamellae. Histochemistry showed that peroxidase activity and terpenoids were detected in the infected resistant plants, 4 and 48 h after inoculation, respectively. In contrast, no changes in the deposits of lignin, suberin, and catechin were seen in either the infected susceptible or resistant lines. We suggest that early flavonoid accumulation is associated with the hypersensitive reaction of cotton cotyledons to X. campestris pv. malvacearum. The activity of wall-bound peroxidases may play a role in the incorporation of flavonoids in cell walls and paramural papillae. (C) 1996 Academic Press Limited.