NDLI: A role of hexokinases in plant resistance to oxidative stress and pathogen infection

Content Provider	Springer Nature Link
Author	Sarowar, Sujon Lee, Jae Yong Ahn, Eu Ree Pai, Hyun Sook
Copyright Year	2008
Abstract	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 ofNbHxk1, aNicotiana 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-overexpressingArabidopsis plants had enhanced tolerance. Moreover, those overexpressing plants showed greater resistance to the necrotrophic fungal pathogenAlternaria brassicicola. HXK-over-expression also mildly protected plants against the bacterial pathogenPseudomonas syringae pv.tomato DC3000, a response that was accompanied by increased H$_{2}$O$_{2}$ production and elevatedPR1 gene expression. These results demonstrate that higher levels of hexokinase confer improved resistance to MV-induced oxidative stress and pathogen infection.
Starting Page	341
Ending Page	346
Page Count	6
File Format	PDF
ISSN	12269239
Journal	Journal of Plant Biology
Volume Number	51
Issue Number	5
e-ISSN	18670725
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	ion leakage fungus infection hexokinase overexpression methyl viologen virus-induced gene silencing Plant Sciences Plant Breeding/Biotechnology Plant Genetics & Genomics Plant Systematics/Taxonomy/Biogeography Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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