The Plant Pathology Journal

한국식물병리학회 (The Korean Society of Plant Pathology)
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Ultrastructures of Colletotrichum orbiculare in Cucumber Leaves Expressing Systemic Acquired Resistance Mediated by Chlorella fusca

  • Kim, Su Jeung (Biotech Center, Pohang University of Science and Technology) ;
  • Ko, Eun Ju (College of Applied Life Science, Sustainable Agriculture Research Institute, Jeju National University) ;
  • Hong, Jeum Kyu (Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech)) ;
  • Jeun, Yong Chull (College of Applied Life Science, Sustainable Agriculture Research Institute, Jeju National University)
  • 투고 : 2017.09.29
  • 심사 : 2017.12.28
  • 발행 : 2018.04.01
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초록

Chlorella, one single-cell green algae organism that lives autotrophically by photosynthesis, can directly suppress some plant diseases. The objective of this study was to determine whether pre-spraying with Chlorella fusca suspension could induce systemic acquired resistance (SAR) in cucumber plants against anthracnose caused by Colletotrichum orbiculare. In order to illustrate SAR induced by algae, infection structures in host cells were observed under a transmission electron microscope (TEM). Cytological changes as defense responses of host mesophyll cells such as accumulation of vesicles, formation of sheath around penetration hyphae, and thickness of cell wells adjoining with intracellular hyphae were demonstrated in cucumber leaves. Similar defense responses were also found in the plant pre-treated with DL-3-aminobutyric acid, another SAR priming agent. Images showed that defense response of host cells was scarcely observed in untreated leaf tissues. These cytological observations suggest that C. fusca could induce SAR against anthracnose in cucumber plants by activating defense responses of host cells.

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참고문헌

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