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Anam, Giridhar Babu,Choi, Jeongdong,Ahn, Youngho Elsevier 2019 International biodeterioration & biodegradation Vol.138 No.-
<P><B>Abstract</B></P> <P>This study is aimed at investigating the performance of the continuous-flow, two-stage anaerobic column for the reductive dechlorination of perchloroethene (PCE) in a trichloroethene (TCE)-contaminated aquifer without bioaugmentation. Results indicated that complete dechlorination of PCE to <I>cis</I>-dichloroethene (DCE) was observed within the first 12 days after the addition of lactate and PCE (620:1 mg mg<SUP>−1</SUP> mass ratio). The PCE conversion to ethene was initially observed in the 2nd column after 70 days (during phase II) upon the increase of lactate to PCE mass ratio to 5000:1 (mg mg<SUP>−1</SUP>). However, the degradation of PCE to ethene occurred in the 1st column after 30 days operation of phase IV (217–310 d) under the high PCE feed conditions (33.65 ± 2.86 μM). 16S rDNA clone library sequence analysis confirmed that <I>Dehalobacter</I> sp., <I>Desulfuromonas</I> sp., <I>Desulfovibrio</I> sp. <I>Geobacter</I> sp., <I>Methanosaeta</I> sp., <I>Methanobacterium paludism</I>, and <I>M. spelaei</I> were the dominant species in the original aquifer, and their relative abundance were further changed following lactate addition. <I>Dehalococcoides mccartyi</I> sequences were retrieved after lactate stimulation. Overall, the continuous-flow, two-stage anaerobic column process exhibited the maximum dechlorination (6.23 μmol L<SUP>−1</SUP> hr<SUP>−1</SUP>) of PCE without bioaugmentation, indicating its potential up-scaling application in PCE dechlorination.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Perchloroethene (PCE) degradation was performed in a two-stage anaerobic system. </LI> <LI> 100% of PCE was degraded to <I>cis</I>-dichloroethene within the first 12 days. </LI> <LI> High concentration of PCE/lactate accelerated the bioconversion of PCE to ethene. </LI> <LI> The two-stage anaerobic system was efficient to degrade PCE without bioaugmentation. </LI> <LI> The two-stage system showed better performance compared to the single stage system. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Research Note : A New Record of Volutella ciliata Isolated from Crop Field Soil in Korea
( Anam Giridhar Babu ),( Sang Woo Kim ),( Dil Raj Yadav ),( Mahesh Adhikari ),( Changmu Kim ),( Hyang Burm Lee ),( Youn Su Lee ) 한국균학회 2015 韓國菌學會誌 Vol.43 No.1
During a survey of fungal species in South Korea, a species of Volutella ciliata was isolated and described based on the analysis of the internal transcribed spacer region of its rDNA and its morphological characteristics. This is the first record of Volutella ciliata isolated from crop field soil in Korea.
A New Record of Volutella ciliata Isolated from Crop Field Soil in Korea
Babu, Anam Giridhar,Kim, Sang Woo,Yadav, Dil Raj,Adhikari, Mahesh,Kim, Changmu,Lee, Hyang Burm,Lee, Youn Su The Korean Society of Mycology 2015 Mycobiology Vol.43 No.1
During a survey of fungal species in South Korea, a species of Volutella ciliata was isolated and described based on the analysis of the internal transcribed spacer region of its rDNA and its morphological characteristics. This is the first record of Volutella ciliata isolated from crop field soil in Korea.
Penicillium menonorum: A Novel Fungus to Promote Growth and Nutrient Management in Cucumber Plants
Babu, Anam Giridhar,Kim, Sang Woo,Yadav, Dil Raj,Hyum, Umyong,Adhikari, Mahesh,Lee, Youn Su The Korean Society of Mycology 2015 Mycobiology Vol.43 No.1
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.
Penicillium menonorum: A Novel Fungus to Promote Growth and Nutrient Management in Cucumber Plants
( Anam Giridhar Babu ),( Sang Woo Kim ),( Dil Raj Yadav ),( Umyong Hyum ),( Mahesh Adhikari ),( Youn Su Lee ) 한국균학회 2015 韓國菌學會誌 Vol.43 No.1
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 Ca3PO4/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.
Palaniappan Selvakumar,Seetharaman Rajasekar,Anam Giridhar Babu,Karupannan Periasamy,Nanjian Raaman,Modem Sudhakara Reddy 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.5
Two hybrid strains were obtained through protoplasmic fusion between Pleurotus ostreatus var. florida and Pleurotus djamor var. roseus. The hybrid strains showed intermediate morphology (colony morphology, cultural characteristics, and fruiting body) to parents. The size and RFLP pattern of two recombinant hybrids were similar, and differed from the parental Pleurotus species. The internal transcribed spacer sequence data revealed that hybrids showed close clad with variety of Pleurotus spp. The hybrid strains showed maximum biological efficiency (138.97%) than the parental strains (110.48-119.19%). In addition, maximum proximate composition, energy values (268.28 kcal), vitamins (thiamine, riboflavin, pyridoxine, folic acid, and calcium pentothenate) and mineral contents (potassium, phosphorus, iron, calcium, and zinc) were recorded in hybrid strain. The hybrid Pleurotus sp. HS would be an important resource of food for mankind, utilize variety of agricultural waste, high amount of nutritional properties and essential food for human health.
( Dil Raj Yadav ),( Sang Woo Kim ),( Anam Giridhar Babu ),( Mahesh Adhikari ),( Changmu Kim ),( Hyang Burm Lee ),( Youn Su Lee ) 한국균학회 2014 Mycobiology Vol.42 No.4
A new recorded species of Mortierella was recovered during the investigation of fungal communities in soil samples collected from different locations of Gangwon-do, Korea. The species was identified and described as Mortierella alpina on the basis of phylogenetic analysis of internal transcribed spacer sequences and morphological characteristics. This species has not been officially reported from Korea thus far.
Research Note : A New Report on Oidiodendron flavum Isolated from Field Soil in Korea
( Mahesh Adhikari ),( Sang Woo Kim ),( Dil Raj Yadav ),( Anam Giridhar Babu ),( Chang Mu Kim ),( Hyang Burm Lee ),( Youn Su Lee ) 한국균학회 2014 韓國菌學會誌 Vol.42 No.3
Oidiodendron flavum KNU13-6 was isolated for the first time from field soil in Korea and identified based on the internal transcribed spacer region (ITS) of rDNA and morphological characteristics. Based on phylogenetic analysis of ITS and morphological characteristics, the species has not been previously reported in Korea.