Tae-Ryong Hahn's research while affiliated with Kyung Hee University and other places

... Genipin is an iridoid cross-linking compound that constitutes 1-3 % of Genipa americana L. (Rubiaceae) and in a minor proportion, 0.17 % of Gardenia jasminoides Ellis (Rubiaceae) (Djerassi et al. 1961;Ramos-de-la-Peña 2014;Tsm et al. 1994). In the early 1960s, Djerassi and co-workers determined the structure of this natural product, C 11 H 14 O 5 , which they named genipin (Almog et al. 2004). Genipin can react spontaneously with primary amine groups of amino acids, peptides or proteins to form dark-blue pigments. ...

... By using F 2 population, several linkage maps have also been constructed (Wu et al, 2002). BPH resistance genes from distantly relative species of rice have been introduced into the cultivated species of rice by mapping with random amplified polymorphic DNA (RAPD) and bulked segregant analysis (BSA) method (Jeon et al, 1999). Compared with other mapping methods, BSA provides a rapid procedure for identifying resistance genes or alleles in the genome, where two pools or bulks of their respective progeny contrasting for a trait can be analyzed to identify resistant markers that can distinguish resistant genotypes from susceptible ones (Michelmore et al, 1991). ...

... Activation of the plant immune system can also affect photosynthesis, resulting in reduced photosynthesis efficiency in some cases of pathogen infection [49][50][51][52] (p. 17121, pp. ...

... The enhancement of photosynthesis in plants activates carbon metabolism and produces carbohydrates vital for plant development. These substances are crucial because they supply the energy and carbon frameworks necessary for the creation of biomolecules for plant growth [36]. In general, the application of both doses of Green Leaves produced a significant increase in the concentration of soluble sugars in the plants compared with control plants (Figure 2a), which is related to the higher photosynthetic activity (Table 4) and the enhanced production of biomass and leaf area (Table 1). ...

... Five DrBphP-specific monoclonal antibodies (2B8, 2C11, 3B2, 3D2, and 3H7) were generated by using highly purified full-length DrBphP and DrBphN (N-terminal domain: 1-321 amino acid region) proteins. 14 An initial ELISA test showed that the 2B8 and 2C11 reacted with both DrBphP and DrBphN, whereas 3B2, 3D2, and 3H7 reacted only with a full length DrBphP protein. To confirm more specific regions of the DrBphP protein for five generated monoclonal antibodies, Western blot analysis was carried out using purified DrBphP and DrBphN proteins. ...

... In response to abiotic stress, fructose acts as a plant signaling molecule, influencing physiological functions such as photosynthesis, seed germination, and flowering. 53 Importantly, metabolomics research has demonstrated considerable down-regulation of low molecular weight antioxidants, plant growth promoters, and stress-resistant components due to CaO NP exposure at both levels, all of which may damage the antioxidant and defense system of the plant. The relevance of these detrimental metabolomics alterations could become clear over a longer period or possibly in the field with exposure to concurrent stressful conditions. ...

... Plant leucine aminopeptidase (LAP) is a metalloenzyme, often requiring metal ions such as zinc or manganese for its catalytic activity [101][102][103][104]. LAP is typically found in the cytoplasm and plastids but can also be localized in other cellular compartments including mitochondria and peroxisomes, depending on the plant species and specific physiological conditions [31,43,[105][106][107][108][109][110]. It plays a significant role in plant development [111][112][113] and its response to environmental adverse conditions including abiotic (Gu et al. [114]; Gu et al. [115]) and biotic stresses [116,117]. ...

... It was first extracted from the bark of Chinese cherries (Prunus pseudocerasus), and subsequently identified in a series of rice studies as a new phytoalexin with brilliant activity against rice blast (Kodama et al. 1992;Hasegawa et al. 2014;Murata et al. 2020). In addition to the accumulation in rice in response to Magnaporthe oryzae infection, sakuranetin also possesses broad-spectrum resistance to oryzicola, and Burkholderia glumae) (Hasegawa et al. 2014;Park et al. 2014). Moreover, UV radiation, CuCl 2 , jasmonic acid, brassinosteroid, and brown planthopper (BPH) attack also induced the accumulation of sakuranetin in rice (Shimizu et al. 2012b;Ogawa et al. 2017;Liu et al. 2023;He et al. 2024). ...

... 2-Arylbenzofuran, 2-(3,4-dihydroxyphenyl)-4,6-dihydroxy benzofuran-3-carboxylic acid methyl ester, and oryzafuran, which have strong antioxidative activity, were also isolated in the bran of Heugjinjubyeo (Han et al 2004). Jeogjinjubyeo contains catechin and catchol-tannins (Kim et al 1999). Therefore, there are distinct differences in the chemical composition among the three cultivars tested and their compositions changed with the degree of milling, resulting in distinct qualitative and quantitative differences in the volatiles emanating from the cooked product. ...