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- W2103296483 abstract "Two common bean (<i >Phaseolus vulgaris</i> L.) mutants, <i >sodPv 1</i> and <i >sodPv 2</i>, exhibiting foliar superoxide dismutase (SOD) activity of only 25% and 40% of their mother control (MC) cv. VL 63 were isolated in EMS-mutagenized (0.15%, 8 h) M2 progeny. Native-PAGE analysis revealed occurrence of Mn SOD, Fe SOD, Cu/Zn SOD I and Cu/Zn SOD II isozymes in MC, while Fe SOD, and Mn SOD were not formed in <i >sodPv 1</i> and <i >sodPv 2</i> leaves, respectively. In-gel activity of individual isozymes differed significantly among the parents. SOD deficiency is inherited as recessive mutations, controlled by two different nonallelic loci. Gene expressions using qRT PCR confirmed higher expressions of Cu/Zn SOD transcripts in both mutants and the absence of Fe SOD in <i >sodPv 1</i> and Mn SOD in <i >sodPv 2</i>. In 50 <svg style=vertical-align:-3.56265pt;width:9.5625px; id=M1 height=12.175 version=1.1 viewBox=0 0 9.5625 12.175 width=9.5625 xmlns:xlink=http://www.w3.org/1999/xlink xmlns=http://www.w3.org/2000/svg> <g transform=matrix(.017,-0,0,-.017,.062,7.675)><path id=x1D707 d=M538 96q-38 -45 -84 -76.5t-71 -31.5q-44 0 -15 117q12 49 18 89h-2q-99 -128 -163 -178q-36 -28 -70 -28q-26 0 -44 38h-2q-16 -69 -16 -129q0 -43 11 -75.5t24 -42.5l1 -6q-7 -12 -24.5 -23t-37.5 -11q-40 0 -40 76q0 52 35 202l94 407l78 24l5 -5q-32 -122 -72 -310
q-7 -33 0 -55t25 -22q36 0 105.5 75t107.5 145l32 146l75 26h10q-50 -197 -78 -347q-7 -38 6 -38q7 0 31 17t47 39z /></g> </svg>M arsenic, Cu/Zn SODs genes were further upregulated but other isoforms downregulated in the two mutants, maintaining SOD activity in its control level. In an F<sub >2</sub> double mutants of <i >sodPv 1</i> × <i >sodPv 2</i>, no Fe SOD, and Mn SOD expressions were detectable, while both Cu/Zn SODs are down-regulated and arsenic-induced leaf necrosis appeared. In contrast to both mutants, ROS-imaging study revealed overaccumulation of both superoxides and H<sub >2</sub>O<sub >2</sub> in leaves of double mutant." @default.
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- W2103296483 date "2013-01-01" @default.
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- W2103296483 title "Superoxide-Dismutase Deficient Mutants in Common Beans (<i>Phaseolus vulgaris</i>L.): Genetic Control, Differential Expressions of Isozymes, and Sensitivity to Arsenic" @default.
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- W2103296483 doi "https://doi.org/10.1155/2013/782450" @default.
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