Mycobiology

The Korean Society of Mycology (한국균학회)
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Penicillium menonorum: A Novel Fungus to Promote Growth and Nutrient Management in Cucumber Plants

  • Babu, Anam Giridhar (Division of Bioresource Sciences, Kangwon National University) ;
  • Kim, Sang Woo (Division of Bioresource Sciences, Kangwon National University) ;
  • Yadav, Dil Raj (Division of Bioresource Sciences, Kangwon National University) ;
  • Hyum, Umyong (Division of Bioresource Sciences, Kangwon National University) ;
  • Adhikari, Mahesh (Division of Bioresource Sciences, Kangwon National University) ;
  • Lee, Youn Su (Division of Bioresource Sciences, Kangwon National University)
  • Received : 2014.11.13
  • Accepted : 2015.02.11
  • Published : 2015.03.31
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Abstract

The present study is the first report on the isolation of Penicillium menonorum from rhizosphere soil in Korea and its identification based on morphological characteristics and internal transcribed spacer gene sequence. The fungal isolate was named KNU-3 and was found to exhibit plant growth-promoting (PGP) activity through indole acetic acid (IAA) and siderophore production, as well as P solubilization. KNU-3 produced 9.7 mg/L IAA and solubilized 408 mg of $Ca_3PO_4/L$, and inoculation with the isolate significantly (p < 0.05) increased the dry biomass of cucumber roots (57%) and shoots (52%). Chlorophyll, starch, protein, and P contents were increased by 16%, 45%, 22%, and 14%, respectively, compared to plants grown in uninoculated soil. The fungus also increased soil dehydrogenase (30%) and acid phosphatase (19%) activities. These results demonstrate that the isolate KNU-3 has potential PGP attributes, and therefore it can be considered as a new fungus to enhance soil fertility and promote plant growth. Moreover, the discovery of PGP ability and traits of this fungus will open new aspects of research and investigations. In this study, plant growth promotion by P. menonorum KNU-3 is reported for the first time in Korea after its original description.

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References

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