Inducers of resistance reduce common bunt infection in wheat seedlings while differentially regulating defence-gene expression

Lu, Zhen-Xiang; Gaudet, D. A.; Puchalski, B.; Despins, T.; Frick, Michele; Laroche, André

doi:10.1016/j.pmpp.2005.12.001

Cited by 59 publications

(51 citation statements)

References 62 publications

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“…The reduction in disease cannot be attributed to the toxic effect of the inducers on the fungus because no conidial or spore germination inhibition has been occurred after inducers treatment ( Jakab et al 2001). Furthermore the protection effect is caused by triggering defence response, as reported for other plant-pathogen interaction (Lu et al 2006, Cohen 2001. Our results are in agreement with Thabit (2008) who found that BABA, BTH, IAA, and SA reduced wheat leaf rust infection through the enhanced of pathogenesis related protein, including peroxidase and phenolic compounds.…”

Section: Discussionsupporting

confidence: 92%

10.5937/ratpov51-5985 = Use of some chemical inducers to improve wheat resistance to Puccinia striiformis f. Sp. Tritici

Al-Maaroof¹,

Fayadh²,

Fattah³

2014

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Section: Discussionsupporting

confidence: 92%

10.5937/ratpov51-5985 = Use of some chemical inducers to improve wheat resistance to Puccinia striiformis f. Sp. Tritici

Al-Maaroof¹,

Fayadh²,

Fattah³

2014

Ratar i povrt

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“…Induced defense responses are regulated by a network of inter-connecting signal transduction pathways, in which the hormonal signals SA, MeJA, and Eth play a major role. Application of SA, MeJA, and Eth can coordinately activate transcripts of different defense-related proteins (Lu et al, 2006). MeJA treatment increased expression of VTC1 and VTC2 transcripts and enhanced AsA accumulation in Arabidopsis (Sasaki-Sekimoto et al, 2005).…”

Section: Responses Of Vpvtc To Pm Pathogen and Defense Signaling Molementioning

confidence: 99%

Expression of a GDP-L-galactose phosphorylase-like gene in a Chinese wild Vitis species induces responses to Erysiphe necator and defense signaling molecules

Hou

Li²,

Gao³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. Using rapid amplification of cDNA ends, a full-length cDNA sequence of a GDP-L-galactose phosphorylase-like gene was isolated from leaves infected by Erysiphe necator in the Chinese wild (Vitis pseudoreticulata) clone, 'Baihe-35-1', an E. necator-resistant genotype. The full-length cDNA, designated as VpVTC, comprised 1943 bp and putatively encodes a 453-amino acid polypeptide containing an HIT motif. The deduced amino acid sequence showed high similarity with that of VTC genes from other plants. The expression of VpVTC, determined by reverse transcriptase-polymerase chain reaction, was induced by E. necator and defense signaling molecules, including salicylic acid, methyl jasmonate, and ethephon, in 'Baihe-35-1', the V. quinquangularis genotype 'Shang-24', and the E. necator-susceptible A GGP-like gene from a Chinese wild Vitis species V. pseudoreticulata genotype, 'Hunan-1'. Transcript levels of VpVTC correlated well with the degree of disease resistance in the 3 genotypes. Maximum induction of VpVTC by E. necator (>7-fold at 96 h postinoculation) occurred in 'Baihe-35-1', which also showed the fastest response to signaling molecules. Upregulating the expression of VpVTC in 'Baihe-35-1' resulted in a gradual increase in the ascorbic acid concentration of leaves inoculated with E. necator. Furthermore, VpVTC was expressed in leaves, stems, inflorescence, tendrils, and fruit at all developmental stages, with the highest level occurring in fruit 35 days after flowering.

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“…The relative intensities of the RT-PCR products were obtained using the histogram function in GIMP 2.6 and then normalized to the expression of Actin. Gene-specific primers used for monitoring PR1 expression were PR1-F (5-CGCAGAACTCGCCGCAGGAC-3) and PR1-R (5-GCAGA CGACACGAGCACAGC-3), for AOS (GenBank accession number: AY196004.1) were AOS-F (5-ACGTCGACAAGGTC GAGAAG-3) and AOS-R (5-GGGCAAGATTGCGAAAAGT A-3), for the JA-inducible putative lipase encoding TaBs117A2 (Lu et al 2005) were LIPASE-F (5-CACAAAAATATCGACC CACCAC-3) and LIPASE-R (5-ACTGGGTATTCGTCTGTC AGC-3), and for Actin were Actin8-F (5-ATGAAGATTAAGG TCGTGGCA-3) and Actin8-R (5-TCCGAGTTTGAAGAGGC TAC-3). Sequences of primers used for monitoring NahG and Tubulin expression are detailed above.…”

Section: Rna Isolation and Analysismentioning

confidence: 99%

Salicylic Acid Regulates Basal Resistance to Fusarium Head Blight in Wheat

Makandar¹,

Nalam²,

Lee³

et al. 2012

MPMI

153

137

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Fusarium head blight (FHB) is a destructive disease of cereal crops such as wheat and barley. Previously, expression in wheat of the Arabidopsis NPR1 gene (AtNPR1), which encodes a key regulator of salicylic acid (SA) signaling, was shown to reduce severity of FHB caused by Fusarium graminearum. It was hypothesized that SA signaling contributes to wheat defense against F. graminearum. Here, we show that increased accumulation of SA in fungusinfected spikes correlated with elevated expression of the SA-inducible pathogenesis-related 1 (PR1) gene and FHB resistance. In addition, FHB severity and mycotoxin accumulation were curtailed in wheat plants treated with SA and in AtNPR1 wheat, which is hyper-responsive to SA. In support of a critical role for SA in basal resistance to FHB, disease severity was higher in wheat expressing the NahGencoded salicylate hydroxylase, which metabolizes SA. The FHB-promoting effect of NahG was overcome by application of benzo (1,2,3), thiadiazole-7 carbothioic acid S-methyl ester, a synthetic functional analog of SA, thus confirming an important role for SA signaling in basal resistance to FHB. We further demonstrate that jasmonate signaling has a dichotomous role in wheat interaction with F. graminearum, constraining activation of SA signaling during early stages of infection and promoting resistance during the later stages of infection.

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Inducers of resistance reduce common bunt infection in wheat seedlings while differentially regulating defence-gene expression

Cited by 59 publications

References 62 publications

10.5937/ratpov51-5985 = Use of some chemical inducers to improve wheat resistance to Puccinia striiformis f. Sp. Tritici

10.5937/ratpov51-5985 = Use of some chemical inducers to improve wheat resistance to Puccinia striiformis f. Sp. Tritici

Expression of a GDP-L-galactose phosphorylase-like gene in a Chinese wild Vitis species induces responses to Erysiphe necator and defense signaling molecules

Salicylic Acid Regulates Basal Resistance to Fusarium Head Blight in Wheat

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