In-Jung Lee

Kyungpook National University

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Abdul Latif Khan

University of Houston

Jong-Guk Kim

Kyungpook National University

Yoon-Ha Kim

Kyungpook National University

Muhammad Waqas

Chinese Academy of Agricultural Sciences

Ahmed Al‐Harrasi

University of Nizwa

Lubna Bilal

University of Nizwa

Sajjad Asaf

University of Nizwa

Abdullah M. Al‐Sadi

Sultan Qaboos University

Jae Ho Shin

Kyungpook National University

Jeong Sheop Shin

Korea University

Cooperative Institutions

Kyungpook National University

Seoul National University

Korea University

University of Nizwa

Korea Research Institute of Bioscience and Biotechnology

Yonsei University

Abdul Wali Khan University Mardan

Kyung Hee University

Rural Development Administration

University of Peshawar

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Seed Germination-Influencing Bioactive Secondary Metabolites Secreted by the Endophyte Cladosporium cladosporioides LWL5

Molecules (2013)

Muhammad Waqas Abdul Latif Khan Liaqat Ali Sang-Mo Kang Yoon-Ha Kim

The present study was aimed to isolate bioactive metabolites produced by a fungal endophyte from Helianthus annuus, Capsicum annuum, and Cucumis sativus and to assess their role in seed germination. Culture filtrate of the endophyte HA-3B from H. annuus was significantly inhibitory towards the germination and growth of lettuce seeds. HA-3B was identified as Cladosporium cladosporioides LWL5 through molecular techniques. Different concentrations (100, 500 and 1000 ppm) of the ethyl acetate extract obtained from the culture inhibited the lettuce seed germination. The extract was subjected to column chromatography and a bioassay-guided isolation method, which yielded compounds 1, 2 and an oily fraction. The oily fraction, subjected to fractionation and spectroscopic techniques, resulted in the identification of 31 different constituents. Compounds 1 and 2 were identified and characterized through MS and NMR spectroscopic techniques as benzoic acid. The bioassay results showed that this compound significantly inhibited the growth and germination of lettuce seeds. In conclusion, assessing the role of endophytes harboring essential crop plants can help us to develop potentially eco-friendly herbicides.

Cladosporium cladosporioides

Endophyte

Cladosporium

Helianthus annuus

Allelopathy

Cucumis

10.3390/molecules181215519

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Citations (13)

Isolation and Identification of Multi-Traits PGPR for Sustainable Crop Productivity Under Salinity Stress

Sustainability (2024)

Md. Injamum-Ul-Hoque Muhammad Imran Nazree Zainurin Shifa Shaffique ⋅Sang-Mo Kang

High salinity poses a significant threat to arable land globally and contributes to desertification. Growth-promoting rhizobacteria assist plants in mitigating abiotic stresses and enhancing crop productivity through the production of siderophores, exopolysaccharides (EPS), solubilisation of phosphate, indole-3-acetic acid (IAA), and other secondary metabolites. This study aimed to isolate, identify, and characterise bacteria that exhibit robust growth-promoting properties. A total of 64 bacterial isolates from the rhizosphere of Miscanthus sinensis were evaluated for plant growth-promoting (PGP) traits, including IAA, EPS, siderophores, and solubilisation of phosphate. Among them, five isolates were selected as plant growth-promoting rhizobacteria (PGPR) based on their PGP features and identified via 16S rRNA sequencing: Enterococcus mundtii strain INJ1 (OR122486), Lysinibacillus fusiformis strain INJ2 (OR122488), Lysinibacillus sphaericus strain MIIA20 (OR122490), Pseudomonas qingdaonensis strain BD1 (OR122487), and Pseudomonas qingdaonensis strain MIA20 (OR122489), all documented in NCBI GenBank. BD1 demonstrated a higher production of superoxide dismutase (SOD) (17.93 U/mg mL), catalase (CAT) (91.17 U/mg mL), and glutathione (GSH) (0.18 U/mg mL), along with higher concentrations of IAA (31.69 µg/mL) and salicylic acid (SA) (14.08 ng/mL). These isolates also produced significant quantities of amino and organic acids. BD1 exhibited superior PGP traits compared to other isolates. Furthermore, the NaCl tolerance of these bacterial isolates was assessed by measuring their growth at concentrations ranging from 0 to 200 mM at 8-h intervals. Optical density (OD) measurements indicated that BD1 and INJ2 displayed significant tolerance to salt stress. The utilisation of these isolates, which enhances plant growth and PGP traits under salt stress, may improve plant development under saline conditions.

Crop Productivity

Identification

Isolation

Crop Production

10.3390/su16219263

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Roles of Pectin Methylesterases and Pectin Methylesterase Inhibitors in Plant Physiology

The Journal of Agricultural Life and Environmental Sciences (2017)

Eun-Young Sohn Yoon-Ha Kim Jung Tae Kim∥Soo-Won Jang In-Jung Lee

Pectin, an enriched component in primary cell walls and middle lamellae, is an essential polysaccharide in all higher plants. Homogalacturonans (HGs), a major form of pectin, are synthesized and methyl-esterified by enzymes localized in the Golgi apparatus and transported into the cell wall. Depending on cell type, the degree and pattern of pectin methylesterification are strictly regulated by cell wall-localized pectin methylesterases (PMEs) which are governed by multiple pectin methylesterase inhibitors (PMEIs) in vivo. Pectin methylesterases (PMEs, EC 3.1.1.11), belonging to carbohydrate esterase family 8, cleave the ester bond between a galacturonic acid and an methyl group and the resulting change in pectin methylesterification status from which clearly impacts diverse plant developmental processes and stress responses. PMEs play major roles in modification of pectin properties, such as the stiffening by forming Ca2+-pectate cross-link complexes or loosening by triggering cell wall degrading enzymes (CWDE)s to break out cell wall components including pectin and its interactiors. The action of PMEIs results in opposite consequences to PMEs on pectin properties. Optimal pectin methylesterification status in each cell type is determined by the balance between PME activity and post-translational PME inhibition by PMEIs.

Pectin

Pectinesterase

Pectate lyase

Esterase

10.12972/jales.20170001

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Citations (3)

Optimal production of 7,10-dihydroxy-8(E)-hexadecenoic acid from palmitoleic acid by Pseudomonas aeruginosa PR3

New Biotechnology (2009)

Jae-Han Bae Min-Jung Suh Beom Soo Kim Ching T. Hou In-Jung Lee

Palmitoleic acid

Bioconversion

Hydroxylation

Biotransformation

10.1016/j.nbt.2009.11.005

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Citations (13)

Role of Green Synthesized Nanoparticles in Agriculture Technology

Nanotechnology in the life sciences (2024)

Shifa Shaffique Peter Odongkara Muhammad Imran Md. Injamum-Ul-Hoque S. M. Ahsan

10.1007/978-3-031-76000-6_16

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Resin Flow, Symptom Development, and Lignin Biosynthesis of Two Pine Species in Response to Wounding and Inoculation with Fusarium circinatum

The Plant Pathology Journal (2010)

Ki Woo Kim In-Jung Lee Changsoo Kim In-Yong Eom Joon-Weon Choi

Resin flow, symptom development, and lignin biosynthesis in response to wounding and fungal inoculation were investigated in Pinus rigida and Pinus densiflora. The two-year-old seedling stems were subjected to three types of treatments: (i) wounding without inoculation, (ii) wound-inoculation with a conidial suspension of Fusarium circinatum, and (iii) pre-wounding woundinoculation with the fungus 20 days after the initial wounding. Resin flow from wounding sites was more evident in P. rigida than P. densiflora in all treatments. The wound-inoculation with the fungus induced almost two-fold higher levels of resin flow than the other treatments in both species. The pre-wounding woundinoculation appeared to result in a decrease in pitch canker development in the two pine species. Some reductions in disease severity were observed in the prewounding wound-inoculated P. rigida, showing a mean disease severity of less than 85%, compared with approximately 100% in the wound-inoculated stems. Disease severity was approximately 50% in the woundinoculated P. densiflora, whereas 10% in the pre-wounding wound-inoculated stems. Higher amounts of lignin were found from bark (ca. 40%) than from xylem (ca. 30%). The wound-inoculated bark and the pre-wounding wound-inoculated bark exhibited higher amounts of lignin among the other treatments. These results suggest that the wound-inoculation apparently prompt the increase in resin flow and lignin biosynthesis from the two pine species, and the prior wounding may be involved in decreased disease severity against the further invasion of F. circinatum.

Pinus densiflora

Canker

10.5423/ppj.2010.26.4.394

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Citations (19)

Nonlinear Deblurring Algorithm on Convex-Mirror Image for Reducing Occlusion

The KIPS Transactions PartA (2006)

In-Jung Lee

볼록거울을 사용하여 CCTV시스템을 만들면 카메라 수를 줄이는 효과가 있다. 이 경우 볼록거울 영상은 횐 영상이므로 평면영상처럼 변환해야 한다. 이 경우에, 중앙에 비추인 영상은 평면 영상으로 변환 후에도 왜곡이 거의 없지만 거울의 테두리 부근에서 얻은 영상을 변환하면 왜곡이 심하게 나타나서 영상 내의 물체를 식별하기가 어려워진다. 이는 볼록거울의 특성으로, 입사각이 겹쳐지면서 생기는 영상 겹침이 일어나기 때문이다. 거기에다 먼 곳에서 오는 빛의 산란과 그로 인한 블러링이 영상을 왜곡 시키는 요인이 된다. 본 논문에서는 이러한 왜곡을 극복하기 위해 편이 등고선 확장 방법과 비선형 파동방정식의 후진대입 해를 이용하여 빛의 산란효과를 줄이는 방법을 제안한다. 보통의 선형적 방법으로는 주파수 영역에서 푸리에 변수가 겹치는 신호로부터 블러드 노이즈를 분리해 낼 수가 없음은 알려져 있다. 그러나 비선형 변분법적 공식을 사용하면 그 블러드 노이즈 제거에 큰 효과를 볼 수 있다. 본 논문의 제안요소는 이 변분법적 공식을 사용하기 전에 편이 등고선 확장정리를 사용하여 영상겹침을 줄이고 파동방정식을 사용하여 산란효과를 줄이는 방법을 사용하는 것이다. 제안 결과를 분석하기 위해 PSNR값을 조사하였더니 파동방정식을 사용한 결과가 사용하지 않은 기존결과에 비해 4dB정도 개선된 값을 보였다. A CCTV system reduces some number of cameras if we use convex-mirror. In this case, convex-mirror Image distorted, we need transformation to flat images. In the center of mirror images, a transformed image has no distortion, but at near boundary image has plentiful distortion. This distortion is caused by occlusion of angled ray and diffraction. We know that the linear filtering approach cannot separate noise from signal where their Fourier spectra overlap. But using a non-linear discretization method, we shall reduce blurred noise. In this paper, we introduce the backward solution of nonlinear wave equation for reducing blurred noise and biased expansion of equilibrium contour. We propose, after applying the introduced method, and calculate with discretization method. To analysis the experimental result, we investigate to PSNR and get about 4dB better than current method.

Deblurring

Distortion (music)

Linear map

10.3745/kipsta.2006.13a.5.429

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Mutation in Wilted Dwarf and Lethal 1 (WDL1) causes abnormal cuticle formation and rapid water loss in rice

Plant Molecular Biology (2010)

Jongjin Park Ping Jin Jinmi Yoon Jung-Il Yang Hee Joong Jeong

Cutin

Cuticle (hair)

Epicuticular wax

Expansin

Epidermis (zoology)

DNA laddering

10.1007/s11103-010-9656-x

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Citations (79)

Synergistic Role of Fusarium solani IK-105 and Humic Acid in Combating Lead Stress in Tomato Plants through physiological, biochemical and molecular Modulation

Plant Stress (2025)

Ibrahim Khan Sajjad Asaf Sang‐Mo Kang Lubna Bilal Nusrat Jahan Methela

Fusarium solani

Fulvic acid

10.1016/j.stress.2025.100780

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A Tracking Algorithm to Certain People Using Recognition of Face and Cloth Color and Motion Analysis with Moving Energy in CCTV

The KIPS Transactions PartB (2008)

In-Jung Lee

특정인을 추적하는 기술은 인간처럼 행동하는 로봇기술에서 가장 많이 등장하는 기술이다. 이 기술은 세 가지 영역에서 접근하고 있는데 첫 째가 특정인의 의상 색상이고 두 번째가 특정인의 얼굴과 그 표정이며 세 번째가 특정인의 제스처나 머리의 움직임이다. 그러나 로봇은 센서를 통해 색상이나 제스처를 감지할 수 있기 때문에 폐쇄회로 카메라를 통해 획득한 영상만으로 특정인을 추적하는 것과는 다르다. 폐쇄회로 카메라에서 가장 큰 문제점은 시스템 속도인데 입력된 영상에서 다시 계산에 의해 특정인을 추적하기위해서는 계산수를 줄여야한다. 시스템 속도를 높이기 위해 색상 추적은 통계치를 사용하는 것이 좋고 얼굴인식은 고유 얼굴을 사용하는 것이 바람직하다. 색상과 얼굴인식만으로는 추적에 어려움이 있기 때문에 모션 분석이 필요하다. 기존의 모션 분석이 주어진 영상의 전체 영역에서 형상을 바탕으로 이루어지기 때문에 속도가 느리고 인식률도 떨어진다. 본 논문에서는 얼굴 인식 시 찾아진 얼굴영역에 대한 모션분석을 계산속도가 빠른 운동에너지를 써서 인식률과 인식 속도를 높였다. 본 논문이 제안한 알고리즘과 Girondel, V. 등이 제시한 방법을 같은 동영상에서 실험한 결과 동일한 인식률을 얻었으며 인식속도는 제안한 알고리즘이 더 빨랐으며 LDA를 사용할 경우 속도는 비슷하나 인식률은 더 나은 결과를 얻었으며 특정인을 찾는 것은 제안한 알고리즘이 더 효과적이었다. It is well known that the tracking a certain person is a vary needed technic in the humanoid robot. In robot technic, we should consider three aspects that is cloth color matching, face recognition and motion analysis. Because a robot technic use some sensors, it is many different with the robot technic to track a certain person through the CCTV images. A system speed should be fast in CCTV images, hence we must have small calculation numbers. We need the statistical variable for color matching and we adapt the eigen-face for face recognition to speed up the system. In this situation, motion analysis have to added for the propose of the efficient detecting system. But, in many motion analysis systems, the speed and the recognition rate is low because the system operates on the all image area. In this paper, we use the moving energy only on the face area which is searched when the face recognition is processed, since the moving energy has low calculation numbers. When the proposed algorithm has been compared with Girondel, V. et al's method for experiment, we obtained same recognition rate as Girondel, V., the speed of the proposed algorithm was the more faster. When the LDA has been used, the speed was same and the recognition rate was better than Girondel, V.'s method, consequently the proposed algorithm is more efficient for tracking a certain person.

Tracking (education)

Template matching

10.3745/kipstb.2008.15-b.3.197

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