Timing of Fusarium Head Blight Infection in Rice by Heading Stage.
Timing of Fusarium Head Blight Infection in Rice by Heading Stage.
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DOI：
10.1080/12298093.2018.1496637
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发表时间：
2018
期刊：
影响因子：
1.9
通讯作者：
Shim HK
中科院分区：
文献类型：
--
作者：
Kim Y;Kang IJ;Shin DB;Roh JH;Heu S;Shim HK
稻谷镰刀菌引起毁灭性的植物病害镰刀菌头枯萎病，并在小型栽培谷物上产生真菌毒素。为研究稻瘟病菌在水稻栽培过程中的侵染时间，在抽穗期前后分别施用稻瘟病菌孢子悬浮液。抽穗后直接发病率最高（50%），此时开花数量最多，抽穗后30天发病的水稻中只有10%出现症状。为了解感染机制，接种了一株表达绿色荧光蛋白（GFP）的禾本科金黄色葡萄球菌（F. graminearum），目测感染情况。孢子分布在颖花和内层种子之间的所有区域，在糊粉层中检测到的绿色荧光蛋白最多。当水稻种子内部受到侵染时，病原菌主要在胚中观察到。这些结果表明，稻瘟病菌在水稻开花期从花药进入子房并进入种子。本研究将有助于揭示该病菌在水稻中的侵染过程。
Fusarium graminearum causes the devastating plant disease Fusarium head blight and produces mycotoxins on small cultivated grains. To investigate the timeframe of F. graminearum infection during rice cultivation, a spore suspension of F. graminearum was applied to the rice cultivars Dongjin 1 and Nampyeongbyeo before and after the heading stage. The disease incidence rate was the highest (50%) directly after heading, when the greatest number of flowers were present, while only 10% of the rice infected 30 days after heading showed symptoms. To understand the mechanism of infection, an F. graminearum strain expressing green fluorescent protein (GFP) was inoculated, and the resulting infections were visually examined. Spores were found in all areas between the glume and inner seed, with the largest amount of GFP detected in the aleurone layer. When the inner part of the rice seed was infected, the pathogen was mainly observed in the embryo. These results suggest that F. graminearum migrates from the anthers to the ovaries and into the seeds during the flowering stage of rice. This study will contribute to uncovering the infection process of this pathogen in rice.
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影响因子：
4.4
作者：
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通讯作者：
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DOI：
10.3390/molecules21050627
发表时间：
2016-05-13
期刊：
Molecules (Basel, Switzerland)
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