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Genetic and molecular regulation of flower pigmentation in soybean
Jagadeesh Sundaramoorthy,박규태,이정동,김정회,서학수,송종태 한국응용생명화학회 2015 Applied Biological Chemistry (Appl Biol Chem) Vol.58 No.4
Flower color is one of the key traits, which has been widely considered for genetic studies on soybean. A variety of flower colors, such as dark purple, purple, purple blue, purple throat, magenta, pink, near white, and white, has been identified in cultivated soybean (Glycine max). Out of the 19,649 soybean accessions deposited in the United States Department of Agriculture-Germplasm Resources Information Network database, 67 % have purple flowers, 32 % have white flowers, and merely 1 % have flowers with different colors. In contrast, almost all accessions of wild soybean (Glycine soja) have only purple flowers. Flavonoids, mainly anthocyanins, are the most common pigments contributing to flower coloration in soybean. In the recent decades, the flavonoid biosynthesis pathway for anthocyanins has been well established, and some of the genes controlling flower color in soybean have been identified and characterized. Flower pigmentation of soybean is mainly controlled by six independent loci (W1, W2, W3, W4, Wm, and Wp) along with the combination of various other factors such as anthocyanin structure, vacuolar pH, and co-pigments. In this review, we summarize the current status of genetic and molecular regulation of flower pigmentation in cultivated and wild varieties of soybean.
Jagadeesh Sundaramoorthy,Gyu Tae Park,Sajeesh Kappachery,Jeong-Dong Lee,Hak Soo Seo,Jong Tae Song 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Soybean [Glycine max (L.) Merr.] seeds are abundant in high-quality proteins and fats. In addition, soybean seeds are also rich in secondary metabolites, such as isoflavones, lecithin, and saponins. Triterpene saponins are major components of these physiologically active metabolites in soybean seeds. Soybean saponins are classified as group A and DDMP saponins. Among them group A saponins are undesirable component of food products due to bitterness and astringency and also cause foaming in tofu production. Whereas, DDMP saponins and their derivatives are less bitter and astringent and beneficial to human health when consumed as regular diet. Therefore, reducing the group A saponins or increasing the DDMP saponins are required to improve the food quality. The present study focused to identify and characterize the gene which is encoding a protein responsible for biosynthesis of DDMP saponins. EMS mutant lines (sg-7-1 & sg-7-2) which lack DDMP saponins were developed. The breeding cross has been made with these two mutants with two cultivars, Pungsannamul and Wooram to study the segregation and genetic linkage analysis, respectively. The segregation analysis showed that the mutant phenotype is controlled by single recessive gene. TLC analysis for phenotyping F2 population of Wooram X sg-7-1 showed mutant, wild and heterozygous types. To surprise two more patterns were detected and they were named as strange type1 (ST1) and strange type2 (ST2). Further, SSR marker analysis will be carried out to locate the gene which encoding a protein responsible for biosynthesis of DDMP saponins.
Genetic and molecular regulation of flower pigmentation in soybean
Sundaramoorthy, Jagadeesh,Park, Gyu Tae,Lee, Jeong-Dong,Kim, Jeong Hoe,Seo, Hak Soo,Song, Jong Tae The Korean Society for Applied Biological Chemistr 2015 Applied Biological Chemistry (Appl Biol Chem) Vol.58 No.4
Flower color is one of the key traits, which has been widely considered for genetic studies on soybean. A variety of flower colors, such as dark purple, purple, purple blue, purple throat, magenta, pink, near white, and white, has been identified in cultivated soybean (Glycine max). Out of the 19,649 soybean accessions deposited in the United States Department of Agriculture-Germplasm Resources Information Network database, 67 % have purple flowers, 32 % have white flowers, and merely 1 % have flowers with different colors. In contrast, almost all accessions of wild soybean (Glycine soja) have only purple flowers. Flavonoids, mainly anthocyanins, are the most common pigments contributing to flower coloration in soybean. In the recent decades, the flavonoid biosynthesis pathway for anthocyanins has been well established, and some of the genes controlling flower color in soybean have been identified and characterized. Flower pigmentation of soybean is mainly controlled by six independent loci (W1, W2, W3, W4, Wm, and Wp) along with the combination of various other factors such as anthocyanin structure, vacuolar pH, and co-pigments. In this review, we summarize the current status of genetic and molecular regulation of flower pigmentation in cultivated and wild varieties of soybean.
Isolation of soybean mutants with high and low inorganic phosphorus
( Jagadeesh Sundaramoorthy ),( Yean Joo Seo ),( Gyu Tae Park ),( Jeong-dong Lee ),( Soon-ki Park ),( Hak Soo Seo ),( Jong Tae Song ) 한국응용생명화학회 2016 Journal of Applied Biological Chemistry (J. Appl. Vol.59 No.3
In soybean (Glycine max (L.) Merr.) seeds, phosphorus (P) is primarily stored in the form of phytate, which is generally indigestible by monogastric animals such as human, pig, poultry, and fish. Thus, this study was conducted to isolate soybean mutants with high available P. Inorganic P content was assessed in a total of 1,266 ethyl methanesulfonate (EMS) M4 lines from the Pungsannamul cultivar. Among the tested lines, four EMS lines (PE379, PE432, PE2205, and PE2503) showed higher mean inorganic P (1.21-1.56 g kg-1) than did the Pungsannamul cultivar (0.90 g kg-1). Additionally, six EMS lines (PE718, PE828, PE1466, PE1552, PE3378, and PE3386) showed lower mean inorganic P (0.38-0.60 g kg-1). The high inorganic P mutants isolated in this study will be further investigated for phytate and total P levels. Moreover, the high and low inorganic P lines will be utilized in a future study of the biochemical pathway of phytate.
Sajeesh Kappachery,Jagadeesh Sundaramoorthy,Gyu Tae Park,Jeong-Dong Lee,Hak Soo Seo,Jong Tae Song 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Soybean germplasm have diverse accessions with great variation in their ability to survive and reproduce under salt stress conditions. In general, cultivated soybeans are more sensitive to salt stress than their wild relatives, however exceptions are found in both the groups. These variations in response to salt stress makes soybean germplasm an interesting collection of genetic resources to be explored for the identification of salt-tolerance genes, and their mechanism of action. Here, in this report we presented a data showing differential response of selected accessions of both cultivated and wild soybeans to salt stress. Two modes of salt treatment; gradual salt stress (GS) as well as salt shock (SS) were used in this study. The GS was found more effective in finding the difference in response of soybean accessions to salt stress. Various genetic marker based methods are in use to identify and isolate the potential genes contributing to the salt tolerance in soybean. Even then there is a paucity of knowledge on the key genes contributing to the salt tolerance in soybean. We expect that a recently developed functional screen based method, like yeast based functional screen, using cDNA library generated from different salt tolerant accessions of soybean could lead to identification of novel genes responsible for salt tolerance in soybean. Also, we propose for the use of RNA isolated from different stages of GS and SS for making cDNA library to be used for functional screening.
[PB-0064] Isolation of Ab-rg rich saponin mutants from EMS-induced population in soybean
Junbeom Park(Junbeom Park),Jagadeesh Sundaramoorthy(Jagadeesh Sundaramoorthy ),Jinwon Lee(Jinwon Lee),Jeong-Dong Lee(Jeong-Dong Lee),Hak Soo Seo(Hak Soo Seo),Jong Tae Song(Jong Tae Song) 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-
Repression of DFR1 expression by w3 mutation in Soybean
Gyu Tae Park,Jagadeesh Sundaramoorthy,Jeong-Dong Lee,Hak Soo Seo,Jong Tae Song 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Soybean [Glycine max (L.) Merr.] have a variety of flower colors which are controlled by six different genes (W1,W2,W3,W4,Wm, and Wp). Among these genes, mutation in W3 gene causes near white flowers in the background of w4 genotype whereas the genotype W3w4 does purple throat flowers. Earlier studies showed that dihydroflavonol 4-reductase1 (DFR1) gene was closely linked to the flower color variants for W3 locus. In order to find out the W3 gene responsible for w3 phenotype, we first, studied the candidate gene Glyma14g07940 (DFR1) which is having 100% similarity with DFR probe sequence. Sequence analysis of DFR1 between W3 and w3 soybeans showed one base substitution in exon 6 of w3 mutant soybean resulting in one amino acid change in the amino acid sequence. However, comparison of amino acid sequences of DFR proteins from various crop plants showed that there is no functional change in the protein. Besides, the promoter analysis showed that, 311 bp of indel was traced in 5’-upstream promoter region of DFR1 gene in the w3 mutant. Here, we show that the near white or purple throat phenotypes in G. max is associated with existence or nonexistence of indel at 5’- upstream promoter region and low or high expression of DFR1, respectively. These results suggest that w3 phenotype may be caused by certain regulator of DFR1 gene located near or distant from DFR1 in G. max. In further study, we need to check the correlation between promoter indel with W3 expression level through GUS analysis.
Overexpression of a novel E3 ubiquitin ligase causes coiled branches phenotype in Arabidopsis
Gyu Tae Park,Jagadeesh Sundaramoorthy,Jeong-Dong Lee,Hak Soo Seo,Jong Tae Song 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
The wild relatives of soybean [Glycine soja Sieb. and Zucc.] have curly/wavy nature whereas cultivated varieties are upright. Such morphological characteristics have agronomic importance too. To investigate the molecular mechanism of development contributing to coiled morphology, screening was carried out to look for Arabidopsis mutants in activation tagging lines obtained by activation T-DNA treatment that have curly/wavy morphology. A mutant named Coiled Branch 1 (cbr1), is found to have a wavy and curly morphology with coiling branches. Plasmid rescue and genomic southern blot analysis revealed the site of T-DNA insertion in the genome. RT-PCR was performed to monitor expression levels of the genes adjacent to the T-DNA integration sites, and showed the activation of an E3 ubiquitin ligase gene. Database search showed that the gene with the RING domain belongs to a family of E3 ubiquitin ligases. Complementation test by overexpression and RNA interference of the gene was also carried out. The complementation test results showed that the novel gene activation tagging affected the cbr1 mutant phenotypes. Ubiquitylation has been linked virtually to every cellular process including plant development. E3 ubiquitin ligase has been reported to recognize target proteins that are to be ubiquinated for further degradation by the proteasome complex. Further, more detailed studies are needed to identify the specific substrate(s) of the novel E3 ubiquitin ligase gene.
Park, Gyu Tae,Sundaramoorthy, Jagadeesh,Park, Jong-Beum,Lee, Jeong Dong,Choi, Kwang Shik,Kim, Jeong Hoe,Seo, Hak Soo,Park, Soon-Ki,Song, Jong Tae Cambridge University Press 2015 Plant genetic resources Vol.13 No.3
<P>Cultivated soybeans [<I>Glycine</I><I>max</I> (L.) Merr.] have various flower colours such as dark purple, purple, light purple, pink, magenta, near white and white. About one-third of the soybean accessions in the United States Department of Agriculture - Germplasm Resource Information Network (USDA-GRIN) Soybean Germplasm Collections have white flowers and are the second dominant accessions after the purple-flowered accessions. Earlier studies have shown that the <I>w1</I> recessive allele of the <I>W1</I> gene encoding flavonoid 3′,5′-hydroxylase produces white flowers. In the present study, we aimed to understand why the white-flowered accessions have become abundant among the cultivated soybeans and what their genetic and regional origin is. For this purpose, 99 landraces with white flowers and 39 landraces with purple flowers from eight Asian countries and Russia were analysed with regard to the nucleotide sequences of the <I>W1</I> locus. We not only found that the <I>w1</I> alleles of the 99 white-flowered landraces were identical to those of the white-flowered Williams 82, but also found that these <I>w1</I> alleles displayed no polymorphism at all. By carrying out a phylogenetic analysis, we were able to identify a group with <I>W1</I> alleles from which the <I>w1</I> allele might have diverged.</P>