PHYTOALEXIN SYNTHESIS BY THE SORGHUM MESOCOTYL IN RESPONSE TO INFECTION BY PATHOGENIC AND NONPATHOGENIC FUNGI
PHYTOALEXIN SYNTHESIS BY THE SORGHUM MESOCOTYL IN RESPONSE TO INFECTION BY PATHOGENIC AND NONPATHOGENIC FUNGI
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DOI：
10.1073/pnas.84.16.5520
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发表时间：
1987-08-01
影响因子：
11.1
通讯作者：
CADENAGOMEZ, G
中科院分区：
文献类型：
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作者：
NICHOLSON, RL;KOLLIPARA, SS;CADENAGOMEZ, G
玉米长蠕孢菌（一种非病原菌）和禾生炭疽菌（一种病原菌）感染高粱中胚轴，导致两个高粱品种的色素复合物的快速积累。该复合物的组分具有真菌毒性。主要化合物已被确定为3-脱氧花青素芹菜素和luteolinidin。在两个高粱品种中积累的Apigeninidin响应感染，是主要的色素。只有一个品种的叶黄素积累。由于合成的速度，只发生在响应接种，和真菌毒性的单个组件，我们建议，合成的色素复合物构成防御反应和化合物apigeninidin和luteolinidin应被视为植物抗毒素。
Infection of the sorghum mesocotyl by Helminthosporium maydis (a nonpathogen) and Colletotrichum graminicola (a pathogen) resulted in the rapid accumulation of a pigment complex by two sorghum cultivars. The components of the complex were fungitoxic. The principal compounds have been identified as the 3-deoxyanthocyanidins apigeninidin and luteolinidin. Apigeninidin accumulated in both sorghum cultivars in response to infection and was the predominant pigment. Luteolinidin accumulated in only one of the cultivars. Because of the speed of synthesis, occurrence only in response to inoculation, and fungitoxicity of the individual components, we propose that synthesis of the pigment complex constitutes a defense response and that the compounds apigeninidin and luteolinidin should be considered as phytoalexins.