Inverse effects of Arabidopsis NPR1 gene on fusarium seedling blight and fusarium head blight in transgenic wheat. (16th July 2012)

• Record Type: Journal Article
• Authors: Gao, C.‐S.; Kou, X.‐J.; Li, H.‐P.; Zhang, J.‐B.; Saad, A. S. I.; Liao, Y.‐C.
• Is Part Of: Plant pathology. Volume 62:Number 2(2013:Apr.)
• Page Start: 383
• Page End: 392
• Publication Date: 2012-07-16
• Subjects: Agricultural pests -- Periodicals; Plant diseases -- Periodicals; 632
• DOI: 10.1111/j.1365-3059.2012.02656.x
• Languages: English
• ISSNs: 0032-0862

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>In this study, the <italic>Arabidopsis thaliana NPR1</italic> (non‐expressor of PR genes) gene was integrated into an elite wheat cultivar, and the response of the transgenic wheat expressing <italic>NPR1</italic> to inoculation with <italic>Fusarium asiaticum</italic> was analysed. With seedling inoculation, the transgenic lines showed significantly increased fusarium seedling blight (FSB) susceptibility, whereas floret inoculation resulted in enhanced fusarium head blight (FHB) resistance. Quantitative real‐time PCR revealed that expression of two defence genes, <italic>PR3</italic> and <italic>PR5</italic>, was associated with susceptible reactions to FSB and FHB, whereas the <italic>PR1</italic> gene was activated in resistance responses. This inverse modulation by the constitutively expressed <italic>NPR1</italic> gene suggests that <italic>NPR1</italic> has a bifunctional role in regulating defence responses in plants. Therefore, it is unsuitable for improving overall resistance to FSB and FHB in wheat.</p> </abstract>