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한국식물학회 / v.51, no.5, 2008년, pp.341-346 
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( A Role of Hexokinases in Plant Resistance to Oxidative Stress and Pathogen Infection ) |
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| 초 록 |
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| Previously, we reported that mitochondria-associated hexokinases are active in controlling programmed cell death in plants (Plant Cell 18, 2341-2355). Here, we investigated their role under abiotic- and biotic-stress conditions. Expression of NbHxk1, a Nicotiana benthamiana hexokinase gene, was stimulated by treatment with salicylic acid or methyl viologen (MV), and was also up-regulated by pathogen infection. In response to MV-induced oxidative stress, NbHxk1-silenced plants exhibited increased susceptibility, while the HXK1- and HXK2-overexpressing Arabidopsis plants had enhanced tolerance. Moreover, those overexpressing plants showed greater resistance to the necrotrophic fungal pathogen Alternaria brassicicola. HXK-over-expression also mildly protected plants against the bacterial pathogen Pseudomonas syringae pv. tomato DC3000, a response that was accompanied by increased $H_2O_2$ production and elevated PR1 gene expression. These results demonstrate that higher levels of hexokinase confer improved resistance to MV-induced oxidative stress and pathogen infection. |
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| 키워드 |
| ion leakage;fungus infection;hexokinase overexpression;methyl viologen;virus-induced gene silencing; |
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Journal of Plant Biology / v.51, no.5, 2008년, pp.341-346
한국식물학회
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200812651530026)
언어 : 영어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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