Kallol Das

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• Doctor of Philosophy
• Post-Doctoral Researcher at California Polytechnic State University

Two fungal species of ascomycetes were discovered during the screening of soil microflora from the Gangwon Province in Korea: Didymella chlamydospora sp. nov. (YW23-14) and Microdochium salmonicolor sp. nov. (NC14-294). Morphologically, YW23-14 produces smaller chlamydospores (8.0–17.0 × 7.0–15.0 µm) than D. glomerata and D. musae. The strain NC14-...

Three fungal strains belonging to the class Sordariomycetes were isolated from soils collected from Gyeongsangbuk-do in Korea. They were identified as Cephalotrichum hinnuleum (UD CT 1-3-3 and KNU-19GWF1) and Thelonectria chlamydospora sp. nov. (UD ST 1-2-1). T. chlamydospora sp. nov. was morphologically identical to T. truncata, but its specific m...

Polylactic acid (PLA) and polycaprolactone (PCL) are commercially available bioplastics that are exploited worldwide, and both are biodegradable. The PLA and PCL polymer-degrading activity of 30 fungal strains that were isolated from terrestrial environments were screened based on the formation of a clear zone around fungal colonies on agar plates...

Fungal strains, designated KNU-NL4 and KNU-OL2, belonging to the family Didymellaceae were isolated from a soil sample collected in Miryang, Korea. Phylogenetic analyses based on a concatenated dataset of DNA sequences of ITS regions and partial sequences of ACT, CAL, TEF1-α, and β-TUB genes showed that the isolates reside in a clade together with...

Contamination of the natural ecosystem by heavy metals, organic pollutants, and hazardous waste severely impacts on health and survival of humans, animals, plants, and microorganisms. Diverse chemical and physical treatments are employed in many countries, however, the acceptance of these treatments are usually poor because of taking longer time, h...

During an investigation of microfungi from various ecosystems in South Korea, two novel fungal species (KNUF-22-094 T and KNUF-23-321C T) were discovered within the genera Microascus and Tolypocladium. The strain KNUF-22-094 T stands out among other Microascus species due to its distinctive conidiogenous cells and conidial size ranges. The conidiog...

Hyaloperonospora brassicae, the causal pathogen of downy mildew, presents significant challenges to spring mix greens production in California. Genetic resistance provides a strategy for sustainable management to reduce downy mildew infections and pesticide use in organic and conventional production systems. This study aimed to identify sources of...

Globally, blast disease in rice is one of the most important challenges limiting affected on rice crop productivity. Systemic acquired resistance (SAR) has been broadly investigated in a variety of plant species for enhancing inner resistance to various phytopathogens. The present study aimed to investigate the potential impact of pipazethate HCL a...

Globally, approximately one-third of the total food produced is wasted. The environmental effect of such wastage is the contribution to greenhouse gas emissions, and economically, money that could have been reinvested in the economy is lost. This research showcases the ability of IoT devices to gather data on wastage and management as they happen,...

Nano-bioremediation, an emerging eco-friendly strategy that integrates nanotechnology and biological processes to mitigate the contamination of heavy metals from the environment. To explore synergistic interactions between plants and microorganisms, focusing on their potential role in enhancing nano-bioremediation are highly demandable. This study...

Our study focused on plant breeding, from traditional methods to the present most advanced genetic and data-driven concepts. Conventional breeding techniques, such as mass selection and cross-breeding, have been instrumental in crop improvement, although they possess inherent limitations in precision and efficiency. Advanced molecular methods allow...

The current landscape indicates that sustainability is gaining traction as one of the core business strategies. The use of data analytics to monitor and improve sustainability measures in organizations has remained one of the most effective approaches. Thus, this study examines the impact of Big Data Analytics (BDA) capabilities on process eco-inno...

Now-a-days AI, cloud computing, and big data are integrated into the best project management practices. While all the phases of a project have varying rates for the adoption of IT solution, AI is adopted 70% in the execution phase and 85% in monitoring and control. Thus, cloud computing shows excellent use in all the stages of a project with an 85%...

With the simultaneous growth in interest from the mycological community to discover fungal species and classify them, there is also an important need to assemble all taxonomic information onto common platforms. Fungal classification is facing a rapidly evolving landscape and organizing genera into an appropriate taxonomic hierarchy is central to be...

The Central Coast of California is a pivotal region for cultivating Brassica crops, including broccoli, cauliflower, arugula, and kale, which are integral to the state’s agricultural output. However, these crops are facing significant challenges from downy mildew, a disease caused by the pathogen Hyaloperonospora spp. This pathogen affects the yiel...

The species within the family Cunninghamellaceae during an investigation of soil microfungi in Korea, in which three strains were isolated from Gangwon, Chungbuk, and Gyeongbuk provinces, designated as KNUF-22-121A, KNUF-22-126A, and KNUF-22-316, respectively. Because the morphological and molecular analyses of these three strains were identical, K...

Globally, blast disease in rice is one of the most important challenges limiting affected on rice crop productivity. Systemic acquired resistance (SAR) has been broadly investigated in a variety of plant species for enhancing inner resistance to various phytopathogens. The present study aimed to investigate the potential impact of pipazethate HCL a...

Data science and predictive analytics are revolutionizing plant biotechnology by revealing crop performance and tolerances. Data science is important in a global context where agricultural demand is rising and crops' yields, resilience, and sustainable resource usage are maximized daily. We explore predictive models in plant biotechnology and how t...

The world population is projected to reach 9.8 billion in 2050, and 11.2 billion in 2100 (United Nations) and people will need food, and decrease the farming land. Thus, the importance of Internet of Things (IoT) and Computer Science (CS) in plant disease management are increasing now-a-days. Mobile apps, remote sensing, spectral signature analysis...

Rapid apple decline (RAD) is a complex phenomenon affecting cultivated apple trees and particularly dwarf rootstocks on grafted young apple trees. Since its first appearance in the United States, RAD has been reported worldwide, for example in Canada, South America, Africa, and Asia. The phenomenon has also been observed in apple orchards in Korea,...

Biochar, a carbon-rich material produced from the pyrolysis of organic biomass, has gained significant attention as a potential solution for sustainable green remediation practices. Several studies analyze biomass-derived biochar techniques and environmental applications, but comprehensive assessments of biochar limitations, uncertainty, and future...

A fungal strain designated KNUF-21-66Q1 was isolated from soil in Chungcheongbuk Province, Korea. Moderate growth of colonies was observed on potato dextrose agar, oatmeal agar (OA), malt extract agar, and cornmeal agar media at 25℃, and the detailed morphology was examined on OA medium. The colonies on OA medium were flat, had entire margin, hyali...

Three fungal strains designated as KNUF-23-MG32, KNUF-23-YC8, and KNUF-23-MJ82 were isolated from the abnormal symptomatic apple trees during screening fungal pathogens collected in Jeollanam-do and Gyeongsangbuk-do, Korea. These fungal strains were found to have similar cultural and morphological characteristics close to the genus Botryosphaeria....

During an investigation of micro-fungi in soil, two fungal isolates belonging to the phylum Ascomycota, namely KNUF-20-NI011 and KNUF-20-NI006, were collected from Gyeongbuk Province and Dokdo Island in Korea and identified as Clonostachys divergens and Chrysosporium merdarium, respectively. The fungal isolates were confirmed through molecular phyl...

The field of plant pathology has adopted targeted genome editing technology as one of its most crucial and effective genetic tools. Due to its simplicity, effectiveness, versatility, CRISPR together with CRISPR-associated proteins found in an adaptive immune system of prokaryotes have recently attracted the interest of the scientific world. Plant d...

Oriental melon (Cucumis melo L.) is a popular Korean, Japanese, and Chinese fruit (Shin et al. 2017). In April 2022, abnormal fruit (n=20) that were collected in Sangju in Gyeongbuk Province (36°27'54.6"N, 128°10'49.7"E), Korea showed approximately 5% disease incidence with severity of 10-15%. Initial symptoms included shriveling, soaking, softenin...

The fungal strain KNUF-22-18B, belonging to Cucurbitariaceae, was discovered from a stink bug (Hygia lativentris) during the investigation of insect microbiota in Chungnam Province, South Korea. The colonies of the strain KNUF-22-18B were wooly floccose, white to brown in the center on oatmeal agar (OA), and the colonies were buff, margin even, and...

In this study, a fungal strain KNUF-22-025 belonging to the genus Botryotrichum was isolated from the soil in Korea. The cultural and morphological characteristics of this strain differed from those of closely related species. On malt extract agar, strain KNUF-22-025 showed slower growth than most of the related species, except B. domesticum. The c...

In this study, fungal strains designated as KNUF-22-14A and KNUF-22-15A were isolated from soil samples in Korea. These two strains were identified based on cultural and morphological characteristics as well as phylogenetic analyses and were found to be morphologically and phylogenetically identical. Upon their morphological comparison with closely...

The fungal strain belonging to the genus Monochaetia of the family Sporocadaceae was isolated from hairy long-horned toad beetle (Moechotypa diphysis) during the screening of microfungi associated with insects from Gangwon Province, Korea. The strain KNUF-6L2F produced white, light brown to dirty black surface, and olivaceous green colonies with th...

Three fungal strains belonging to the class Sordariomycetes were isolated from soil collected on Jeju Island and Gyeongsangbuk-do, Korea. They were identified as Diaporthe endophytica (KNU-JJ-1809), Faurelina indica (KNU-JJ-1830), and Trichoderma ivoriense (KNU-4-KH1). KNU-JJ-1809 produced beta conidia that were straight, curved, hyaline, smooth-wa...

Two fungal strains belonging to Ascomycota were discovered in Gyeonggi-do, Korea, during this investigation of soil microfungi and microbiota of insects. The strain KNUF-20-047 produced milky white on the back and a milky creamy center to white toward the margin on the front side of colonies. Conversely, the closest Xenoacremonium falcatus displaye...

Seven Tuberose genotypes viz. TR-001, TR-002, TR-003, TR-004, TR-005, TR-006 and BARI Tuberose-1 were studied to evaluate their performance at the Floriculture Research Field, Horticulture Research Centre (HRC), Bangladesh Agricultural Research Institute (BARI), Gazipur during the period from April, 2015 to January, 2016. The genotype TR-001, TR-00...

Mushrooms are high in nutrients, including proteins, minerals, vitamins, and bioactive components like phenolic compounds, terpenes, steroids and polysaccharides. The demand for cultivating mushrooms is growing by the day, as people become more aware of its palatability and high nutritional worth. But diseases cause heavy losses in commercial m...

The experiment was conducted under in-vivo condition in a betelvine baroj at Sher-e-Bangla Agricultural University (SAU), Dhaka-1207, Bangladesh. Nineteen isolates of Sclerotium rolfsii collected from different regions of Bangladesh designated as isolate-1 to isolate-19. Soil inoculated with S. rolfsii exhibited mycelial growth on the soil surface...

The field of environmental and microbial ecology is undergoing a revolution, having ramifications in microbiology, ecology, and ecosystem research. The tremendous accumulation of molecular data is revealing a vast diversity of microbial groups, as well as unique microbial functions. Plants are part of a varied ecosystem in their natural habitat, wh...

In this study, the fungal strains KNU-Gunwi 2B and KNU-SOT5 were isolated from root-soil in a hillside and the cherry tree bark (Prunus serrulata), respectively from Gyeongbuk province in Korea. The strain KNU-SOT5 produced dark brown chlamydospores that were smooth to lightly rough-walled, globose to ellipsoidal, and the conidia were aseptate, gut...

A fungal strain designated KNU16-007, belonging to the family Botryosphaeriaceae, was isolated from soil in Daegu, Korea. Phylogenetic analyses based on the concatenated nucleotide sequences of the ITS and TEF-1α regions, showed that the isolate resides in a clade together with Diplodia species but occupies a distinct phylogenetic position. Conidia...

Piper betel or Betelvine leaves called Pan belongs to the family Piperaceae. Leaves are rich in many nutrients like water, energy, protein, fats, fiber, calcium and iron etc. and the antioxidants and used for chewing in Bangladesh. The foot and root rot caused by Sclerotium rolfsii is the most devastating disease that decreases the production of be...

Nanotechnology is an advanced and evolving discipline in the field of science and technology with various applications in other fields such as the life sciences, and is increasingly important in the plant sciences as well. It is estimated that 20–40% of crops are lost each year due to plant pests and pathogens. The current plant disease managem...

A fungal strain was isolated from a soil sample collected in Korea and designated as YW23-8. Based on a sequence analysis of the internal transcribed spacer (ITS) regions, the isolate was assigned to the genus Sarcopodium. Moreover, a phylogenetic analysis based on the concatenated nucleotide sequences of the ITS regions and the large subunit of th...

During the screening of Korean microflora, a fungal strain (KNU-PT-1804) belonging to the genus Pestalotiopsis was isolated from persimmon tree (Diospyros kaki) bark collected from North Gyeongsang Province, Korea. The strain, KNU-PT-1804, produced smaller conidia compared with related species P. kenyana, P. neglecta, and P. telopeae. The novelty o...

The strains 17E-042, 17E-039, and NC13-171 belong to Ascomycota and were isolated from soil collected from Sancheong-gun and Yeongam-gun, Korea. The strain 17E-042 produced white mycelial colonies that developed a sienna color with a round margin on potato dextrose agar (PDA), and the reverse side developed a light sienna color. Morphologically, th...

This study was conducted to isolate and identify the fungal pathogen caused unreported post-harvest disease on apples (cv. Fuji) fruit in Korea. The disease symptoms on apples appeared as irregular, light to dark brown, slightly sunken spots. The three fungal strains were isolated from infected tissues of apple fruits and their cultural and morphol...

Two fungal strains (KNU-JJ-1827 and KNU-JJ-1829) belonging to the class Dothideomycetes were discovered from Jeju Island, Korea during this investigation of soil microfungi. Strain KNU-JJ-1827 showed fewer conidial septations, larger conidiogenous cells, and smaller conidia compared to the previously identified closest species of Didymocyrtis. Stra...

Two unreported fungal isolates, KNU-GW1901 and KNU-AP100C, were collected from soil sample in Gyeongsangbuk-do, Korea. Their cultural and morphological characteristics were examined after 4 weeks of incubation at 25℃ on potato dextrose agar (PDA), malt extract agar (MEA), and oatmeal agar (OA). The conidial shape of KNU-GW1901 was aseptate, hyaline...

In the screening of fungal diversity, two strains were collected from the soil of Yeongcheon and dissected guts from the bodies of Chinese rice grasshopper (Oxya chinensis), Chinese grasshopper (Acrida cinerea), and Far eastern devil grasshopper (Oedaleus infernalis) from Daejeon in Korea. They were identified as Umbelopsis vinacea (KNU-YC-1801B) a...

A fungal strain, designated KNUF 20 INY 03 belonging to the class Sordariomycetes was isolated from insect Riptortus clavatus during the screening of mycobiota in Korea The strain revealed similar cultural and morphological characteristics with the closest type species Acaulium acremonium The distinctness of strain KNUF 20 INY 03 was determined spe...

In 2020, various abnormal symptoms were collected from the cold-stored apples (cv. Arisoo). Round, dark, and spongy lesions were observed on the fruits and the symptoms were distinct to typical fruit disease symptom. To isolate fungal agents, the symptomatic parts were wiped with 70% ethanol and then placed on potato dextrose agar following the inc...

In 2019, withered apple trees were collected from several apple orchards in Gyeongsang Province, Korea. The leaves slowly became withered, after that trees were dried out and finally declined. White or black dot-like structures that appeared on the surface of the diseased parts were distinctly different comparing with the previously reported genera...

A fungal strain designated KNU-WDM2A2 was isolated from mosquitoes in Gimcheon, Korea. The pure culture was transferred to potato dextrose agar (PDA) and synthetic nutrient agar (SNA) media and attained a diameter of 90 mm after 10 days of incubation at 25℃. The colonies were whitish to light pink and cottony to wooly, with an abundant production o...

A fungal isolate US-18-11 was isolated from the soil in Uiseong, Korea. The mycelium growth measured after 7 days of incubation at 22℃ on malt extract agar (MEA) and oatmeal agar (OA) media was 42-43 mm and 41-44 mm in diameter, respectively. The fungal colony formed white to dull green aerial mycelia that were floccose with regular margins and oli...

Forty grasshoppers were collected and dissected guts from their bodies were used to isolate fungal species A number of fungal strains were isolated from guts of Chinese rice grasshopper Oxya chinensis Chinese grasshopper Acrida cinerea and Far eastern devil grasshopper Oedaleus infernalis collected in Daejeon Nine fungal strains were chosen based o...

A designated fungal isolate, KNU-US-1802E was isolated from the soil in Uiseong, Korea. To identify characteristics of the isolate, it was cultured on PDA media for 6 days at 35°C. Colonies on PDA are flat, light gray, dense, with entire margins; reverse dark gray to black, with white margins. Aerial mycelia were smooth-walled, hyaline and 40~42 mm...

Cladophialophora is characterized by simple hyphomycetes with brown hyphae that give rise to branched chains of pale brown conidia and shows affinities with the Herpotrichiellaceae. A fungal strain belonging to the genus Cladophialophora was isolated from soil in Daegu, Korea. This strain produces numerous greenish to dark black lanose aerial mycel...

Members of the genus Cladophialophora are characterized by the brown hyphae of simple hyphomycetes which produce branched chains of pale brown conidia in the ascomycete family Herpotrichiellaceae. The novel isolated fungal strain (KNU16-032) belonging to the genus Cladophialophora produces numerous greenish to dark black colored lanose aerial mycel...

The fungal isolate, designated JJ 18 24 was isolated from a soil sample collected from a field in Jeju Island, Korea The colonies of the isolate cultured on PDA, MEA and CMAD for 14 days at 25 C showed the diameters of 49 7 mm, 61 5 mm, and 48 3 mm, respectively This colony on the PDA medium displayed a dark green color on both sides with irregular...

A designated fungal isolate, US-2E was isolated from the soil in Uiseong, Korea. To find the cultural characteristics, the isolate was cultured on PDA media for 6 days at 35°C. Colonies on PDA was flat, light grey, dense, irregular margin, reverse dark gray to black, white in margins. Aerial mycelia smooth-walled, hyaline and had 40~42 mm diameter...

The fungal strains KNU16-004 and PTT-2 were isolated from soil and the bark of a persimmon (Diospyros kaki) tree in Korea, respectively. The produced ascospores of strain KNU16-004 were ellipsoid to oblong with a gelatinous sheath with the diameter of 30.8~34.9 × 8.1~15.8 μm, and the asci were bitunicate and thick-walled, 73.5~87.5 × 23.7~37.9 μm....

Two fungal strains (17E029 and NC14-264) were isolated from soil in Jeju Island and Jeongeup, Jeollabuk-do, Korea, respectively. The strain 17E029 produced conidia which were hyaline, aseptate, smooth, guttulate, oval to subcylindrical, irregular in shape, and with the diameter of 6.0~7.8 × 3.0~3.4 µm. In case of NC14-264, the strain produced irreg...

A fungal isolate designated 17E029 was isolated from a soil sample in Jeju, Korea. The strain was similar to other Allantophomopsiella species in its morphological characteristics such as grey mycelia, conidiophore, and conidia sizes. The isolate produced aerial mycelia, which appeared grey on the reverse side of the media surfaces and turned black...

A fungal strain, designated PTT-2, was isolated from the bark of the trunk of a persimmon (Diospyros kaki) tree in Cheongdo, Korea. The isolate showed morphological similarities with Leptosphaerulina saccharicola. Strain PTT-2 had more rapid growth on potato dextrose agar medium than on oatmeal agar, malt extract agar, and synthetic nutrient poor a...

A fungus was isolated from field soil collected from Daegu, Korea. The colony of the isolated fungus showed short, branched, and light to dark yellow pigments with hyaline, yellowish red to orange brown aerial mycelia. In addition, the fungus produced solitary to aggregated perithecia, ovoid to pyriform, short neck, and asci as well as biseriately...

An investigation was carried out in Bogra district under the Social forest region of Bangladesh to study the biodiversity, distribution and morphology of wild macro fungi during June to October, 2015. A total of 32 fungal samples were collected and identified to 16 species belong to two genera under 7 families. The polypore genera were Ganoderma sp...

Mangrove (Sundarban), the largest single block of tidal halophytic forest in the world, located in the south western part of Bangladesh. The forest lies a little south to the Tropic of Cancer between the latitudes 21°30'N and 22°30'N, and longitudes 89°00'E and 89°55'E and also lies on the Ganges-Brahmaputra Delta at the point where it merges with...

In this study, a new fungal species of genus Colletotrichum was isolated from leaf spots lesion of persimmon, which collected from Sangju and Cheongdo in the Gyeongbuk province of Korea. The fungi isolate obtained from the leaf spots symptoms on persimmon was identified as Colletotrichum kakivorum based on the morphological and phylogenetic analysi...

In this study, a new fungal species of genus Colletotrichum was isolated from leaf spots lesion of persimmon, which collected from Sangju and Cheongdo in the Gyeongbuk province of Korea. The fungi isolate obtained from the leaf spots symptoms on persimmon was identified as Colletotrichum kakivorum based on the morphological and phylogenetic analysi...

This study was carried out to identify the fungal flora and opportunistic fungi associated with earthworm (Eisenia Andrei). A number of fungal isolates were collected from intestines and whole body of E. andrei among them, 14 fungal strains were found to belong to 5 genera based on the morphological characteristics and molecular analysis using inte...

Three fungal strains belonging to the class Sordariomycetes, namely BH-06, 17-039 and BE12-1, were isolated from soils in Korea and identified as Chaunopycnis alba, Myrothecium cinctum and Humicola olivacea, respectively. These species were confirmed according to their morphological characteristics and phylogenetic relationships determined based on...

A fungal isolate designated KNU16-033 was isolated from a soil sample in Daegu, Korea. White, short, and felt-like aerial mycelia appeared on the surface of colonies of the isolate. Colonies with a smooth texture developed slowly and reached a diameter of 78 mm after 21 days of incubation on potato dextrose agar. This isolate displayed globose, col...

A detailed survey was made in Rangamati district of Chittagong hill tracts from July to October, 2016 to collect and record the morphological and ecological variability of macrofungi fruiting body. Collected macrofungi were washed with water and dried by electric air flow drier. Permanent glass slides were made from rehydrated basidiocarp for micro...

This investigation was conducted in National Botanical Garden, Dhaka located at 24°00′ N (Latitude), 90°00′ E (Longitude) to document the morphology, diversity and distribution of macro fungi during the rainy seasons of July to October, 2015. A total of 23 macro fungi samples were collected and identified to 20 species under 10 genera and 10 famili...

Sundarban (Mangrove), the largest tidal halophytic forest in the world lies a little south to the Tropic of Cancer between the latitudes 21°30'N and 22°30'N, and longitudes 89°00'E and 89°55'E. This forest is the greatest source of diverse xylotrophic fungi. In a survey program 20 species of xylotrophic fungi belongs to 13 genera were identified un...