Brassinosteroid functions in a broad range of disease resistance in tobacco and rice
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Open Access
- 28 February 2003
- journal article
- research article
- Published by Wiley in The Plant Journal
- Vol. 33 (5) , 887-898
- https://doi.org/10.1046/j.1365-313x.2003.01675.x
Abstract
Summary: Brassinolide (BL), considered to be the most important brassinosteroid (BR) and playing pivotal roles in the hormonal regulation of plant growth and development, was found to induce disease resistance in plants. To study the potentialities of BL activity on stress responding systems, we analyzed its ability to induce disease resistance in tobacco and rice plants. Wild‐type tobacco treated with BL exhibited enhanced resistance to the viral pathogen tobacco mosaic virus (TMV), the bacterial pathogen Pseudomonas syringae pv. tabaci (Pst), and the fungal pathogen Oidium sp. The measurement of salicylic acid (SA) in wild‐type plants treated with BL and the pathogen infection assays using NahG transgenic plants indicate that BL‐induced resistance does not require SA biosynthesis. BL treatment did not induce either acidic or basic pathogenesis‐related (PR) gene expression, suggesting that BL‐induced resistance is distinct from systemic acquired resistance (SAR) and wound‐inducible disease resistance. Analysis using brassinazole 2001, a specific inhibitor for BR biosynthesis, and the measurement of BRs in TMV‐infected tobacco leaves indicate that steroid hormone‐mediated disease resistance (BDR) plays part in defense response in tobacco. Simultaneous activation of SAR and BDR by SAR inducers and BL, respectively, exhibited additive protective effects against TMV and Pst, indicating that there is no cross‐talk between SAR‐ and BDR‐signaling pathway downstream of BL. In addition to the enhanced resistance to a broad range of diseases in tobacco, BL induced resistance in rice to rice blast and bacterial blight diseases caused by Magnaporthe grisea and Xanthomonas oryzae pv. oryzae, respectively. Our data suggest that BDR functions in the innate immunity system of higher plants including dicotyledonous and monocotyledonous species.Keywords
This publication has 53 references indexed in Scilit:
- Probenazole induces systemic acquired resistance in Arabidopsis with a novel type of actionThe Plant Journal, 2001
- Rhizobacteria-mediated induced systemic resistance (ISR) in Arabidopsis requires sensitivity to jasmonate and ethylene but is not accompanied by an increase in their productionPhysiological and Molecular Plant Pathology, 2000
- A novel stress-inducible 12-oxophytodienoate reductase from Arabidopsis thaliana provides a potential link between Brassinosteroid-action and Jasmonic-acid synthesisJournal of Plant Physiology, 2000
- Antagonistic Effect of Salicylic Acid and Jasmonic Acid on the Expression of Pathogenesis-Related (PR) Protein Genes in Wounded Mature Tobacco LeavesPlant and Cell Physiology, 1998
- Improvement of Cold Resistance in Rice Seedlings by 5-Aminolevulinic AcidJournal of Pesticide Science, 1998
- Expression of Defense-related Genes by Probenazole or 1, 2-Benzisothiazole-3(2H)-one 1, 1-dioxideJournal of Pesticide Science, 1997
- Characterization of aSalicylicAcid-Insensitive Mutant (sai1) ofArabidopsis thaliana, Identified in a Selective Screen Utilizing the SA-Inducible Expression of thetms2GeneMolecular Plant-Microbe Interactions®, 1997
- Brassinosteroids Rescue the Deficiency of CYP90, a Cytochrome P450, Controlling Cell Elongation and De-etiolation in ArabidopsisPublished by Elsevier ,1996
- Effects of Probenazole (Oryzemate®) on Rice Plants with Reference to Controlling Rice BlastJournal of Pesticide Science, 1979
- The Problem of Acquired Physiological Immunity in PlantsThe Quarterly Review of Biology, 1933