Jasmonate and salicylate as global signals for defense gene expression

Reymond, Philippe; Farmer, Edward E.

doi:10.1016/s1369-5266(98)80264-1

Cited by 902 publications

(622 citation statements)

References 65 publications

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“…In wheat, expression of TaHSC70 was induced by MeJA treatments in the early stage (2 h after being treated), but this was not found after treatments with SA, ET and ABA. JA plays a crucial role in plant development and defence responses to wounding, insect pests and plant pathogens [46][47][48]. Therefore, TaHSC70 was presumed to be involved in basal defense through JA signaling pathway.…”

Section: Discussionmentioning

confidence: 99%

Characterization of a wheat HSP70 gene and its expression in response to stripe rust infection and abiotic stresses

et al. 2010

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Members of the family of 70-kD heat shock proteins (HSP70 s) play various stress-protective roles in plants. In this study, a wheat HSP70 gene was isolated from a suppression subtractive hybridization (SSH) cDNA library of wheat leaves infected by Puccinia striiformis f. sp. tritici. The gene, that was designated as TaHSC70, was predicted to encode a protein of 690 amino acids, with a molecular mass of 73.54 KDa and a pI of 5.01. Further analysis revealed the presence of a conserved signature that is characteristic for HSP70s and phylogenetic analysis demonstrated that TaHSC70 is a homolog of chloroplast HSP70s. TaHSC70 mRNA was present in leaves of both green and etiolated wheat seedlings and in stems and roots. The transcript level in roots was approximately threefold less than in leaves but light-dark treatment did not charge TaHSC70 expression. Following heat shock of wheat seedlings at 40°C, TaHSC70 expression increased in leaves of etiolated seedlings but remained stable at the same level in green seedlings. In addition, TaHSC70 was differentially expressed during an incompatible and compatible interaction with wheat-stripe rust, and there was a transient increase in expression upon treatment with methyl jasmonate (MeJA) treatment. Salicylic acid (SA), ethylene (ET) and abscisic acid (ABA) treatments had no influence on TaHSC70 expression. These results suggest that TaHSC70 plays a role in stress-related responses, and in defense responses elicited by infection with stripe rust fungus and does so via a JA-dependent signal transduction pathway.

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Section: Discussionmentioning

confidence: 99%

Characterization of a wheat HSP70 gene and its expression in response to stripe rust infection and abiotic stresses

et al. 2010

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“…The F-box protein Coronatine Insensitive-1 (COI1), which forms the SCF COI1 complex with ASK1/ASK2, Cullin1, and Rbx1, is involved in diverse JA responses (Xu et al, 2002), most of which are disrupted in the Arabidopsis mutant coronatine insensitive 1 (coi1). A coi1-1 mutant with a premature stop codon at W467 failed to accumulate anthocyanin in response to methyl JA (Reymond and Farmer, 1998;Xie et al, 1998). Analysis of several transcript levels in coi1-1 mutants showed reduced expression of three anthocyanin regulatory factors, PAP1, PAP2 and GL3, which transcriptionally regulate the LBGs DFR, LDOX and UF3GT (Devoto et al, 2005).…”

Section: Interaction Of Sugar With Jamentioning

confidence: 99%

Sugar-Hormone Cross-Talk in Anthocyanin Biosynthesis

Das

Shin

Choi

et al. 2012

Molecules and Cells

164

116

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“…Plant response to herbivore and pathogen attacks often involves the interaction of multiple signal pathways that are controlled by a small number of global signals (Reymond and Farmer, 1998). However, it is questionable whether the outcome of the crosstalk always leads to the most effective plant defense for the specific challenge.…”

Section: Are Plants Misled By Aphids?mentioning

confidence: 99%

Transcriptional Regulation of Sorghum Defense Determinants against a Phloem-Feeding Aphid

et al. 2004

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When attacked by a phloem-feeding greenbug aphid (Schizaphis graminum), sorghum (Sorghum bicolor) activates jasmonic acid (JA)- and salicylic acid (SA)-regulated genes, as well as genes outside known wounding and SA signaling pathways. A collection of 672 cDNAs was obtained by differential subtraction with cDNAs prepared from sorghum seedlings infested by greenbug aphids and those from uninfested seedlings. Subsequent expression profiling using DNA microarray and northern-blot analyses identified 82 transcript types from this collection responsive to greenbug feeding, methyl jasmonate (MeJA), or SA application. DNA sequencing analyses indicated that these encoded proteins functioning in direct defense, defense signaling, oxidative burst, secondary metabolism, abiotic stress, cell maintenance, and photosynthesis, as well as proteins of unknown function. In response to insect feeding, sorghum increased transcript abundance of numerous defense genes, with some SA-dependent pathogenesis-related genes responding to greenbug more strongly than to SA. In contrast, only weak induction of MeJA-regulated defense genes was observed after greenbug treatment. However, infestation tests confirmed that JA-regulated pathways were effective in plant defense against greenbugs. Activation of certain transcripts exclusively by greenbug infestation was observed, and may represent unique signal transduction events independent of JA- and SA-regulated pathways. Results indicate that plants coordinately regulate defense gene expression when attacked by phloem-feeding aphids, but also suggest that aphids are able to avoid triggering activation of some otherwise potentially effective plant defensive machinery, possibly through their particular mode of feeding.

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Jasmonate and salicylate as global signals for defense gene expression

Cited by 902 publications

References 65 publications

Characterization of a wheat HSP70 gene and its expression in response to stripe rust infection and abiotic stresses

Characterization of a wheat HSP70 gene and its expression in response to stripe rust infection and abiotic stresses

Sugar-Hormone Cross-Talk in Anthocyanin Biosynthesis

Transcriptional Regulation of Sorghum Defense Determinants against a Phloem-Feeding Aphid

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