Mycobiology

The Korean Society of Mycology (한국균학회)
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Tobacco Growth Promotion by the Entomopathogenic Fungus, Isaria javanica pf185

  • Lee, Yong-Seong (Department of Applied Biology, College of Agriculture and Life Sciences, Chonnam National University) ;
  • Kim, Young Cheol (Department of Applied Biology, College of Agriculture and Life Sciences, Chonnam National University)
  • Received : 2018.10.25
  • Accepted : 2018.12.15
  • Published : 2019.03.01
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Abstract

Isaria javanica pf185 is an important entomopathogenic fungus with potential for use as an agricultural biocontrol agent. However, the effect of I. javanica pf185 on plant growth is unknown. Enhanced tobacco growth was observed when tobacco roots were exposed to spores, cultures, and fungal cell-free culture supernatants of this fungus. Tobacco seedlings were also exposed to the volatiles of I. javanica pf185 in vitro using I-plates in which the plant and fungus were growing in separate compartments connected only by air space. The length and weight of seedlings, content of leaf chlorophyll, and number of root branches were significantly increased by the fungal volatiles. Heptane, 3-hexanone, 2,4-dimethylhexane, and 2-nonanone were detected, by solid-phase micro-extraction and gas chromatography-mass spectrophotometry, as the key volatile compounds produced by I. javanica pf185. These findings illustrate that I. javanica pf185 can be used to promote plant growth, and also as a biocontrol agent of insect and plant diseases. Further studies are necessary to elucidate the mechanisms by which I. javanica pf185 promotes plant growth.

Keywords

References

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