Suppression by Red Light Irradiation of Corynespora Leaf Spot of Cucumber Caused by Corynespora cassiicola
Suppression by Red Light Irradiation of Corynespora Leaf Spot of Cucumber Caused by Corynespora cassiicola
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DOI：
10.1111/j.1439-0434.2009.01632.x
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发表时间：
2010-05-01
影响因子：
1.5
通讯作者：
Arase, Sakae
中科院分区：
文献类型：
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作者：
Rahman, Muhamad Zahidur;Khanam, Hosneara;Arase, Sakae
在温室中研究了红光照射对由 Corynespora cassiicola (Berk. & Court.) 引起的黄瓜植物 (Cucumis sativus L. cv. Hokushin) 棒孢菌叶斑发育的影响。在没有红光（-Red）的温室中，病斑扩大、合并，最后覆盖黄瓜的整个叶子。然而，在红光（+Red）的温室中，病变的出现相对于-Red下的病变延迟，并且其发展也被显着抑制。在同一温室中+红色和-红色下生长的黄瓜中也观察到了疾病发展的这种差异。在温室种植的接种 C. cassiicola 的黄瓜中也观察到红光下的疾病抑制。红光并没有抑制病原体的感染行为。我们的结果表明，+Red处理下黄瓜棒孢叶斑病的延迟和抑制是由于黄瓜抗性的诱导，而不是两个温室之间环境条件或真菌种群的差异。红光诱导的抗性可能有助于开发控制温室黄瓜棒孢叶斑病的新方法。
The effect of red light irradiation on development of Corynespora leaf spot of cucumber plants (Cucumis sativus L. cv. Hokushin) caused by Corynespora cassiicola (Berk. & Court.) was investigated in greenhouses. In a greenhouse without red light (-Red), lesions enlarged, coalesced, and finally covered the entire leaves of cucumber. In a greenhouse with red light (+Red), however, lesion appearance was delayed relative to that under -Red and its development was also significantly suppressed. Such difference in disease development was also observed in cucumbers grown under +Red and -Red in the same greenhouse. Disease suppression under red light was also observed in glasshouse-grown C. cassiicola-inoculated cucumbers. Red light did not inhibit the infection behaviour of the pathogen. Our results indicated that the delay and suppression of Corynespora leaf spot of cucumber under +Red were due to induction of resistance in cucumber, and not to differences in environmental conditions or fungal population between the two greenhouses. Red light-induced resistance might contribute to the development of new methods for controlling Corynespora leaf spot of greenhouse-grown cucumber.