Resistance gene-dependent plant defense responses.

Hammond‐Kosack, K. E.; Jones, Jonathan D. G.

doi:10.1105/tpc.8.10.1773

Cited by 1,380 publications

(525 citation statements)

References 138 publications

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“…Systemic acquired resistance (SAR) is a classic inducible defense response activated by a necrotizing pathogen [4]. Typical SAR results in an increment of endogenous SA and transcriptional activation of pathogenesis-related (PR) genes (e.g., PR1, PR2, PR5) [5].…”

Section: Introductionmentioning

confidence: 99%

OsWRKY03, a rice transcriptional activator that functions in defense signaling pathway upstream of OsNPR1

et al. 2005

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WRKY family proteins are a class of plant specific transcription factors that involve in many stress response pathways. It has been shown that one Arabidopsis WRKY protein, AtWRKY29/22, is activated by MAP kinase signaling cascade and confers resistance to both bacterial and fungal pathogens. However, little is known about the biological roles of WRKY proteins in rice. In this study, we investigated the expression patterns of rice AtWRKY29/22 homolog, OsWRKY03, under different conditions, and also its possible role involved in plant defense. Our results showed that OsWRKY03 was up-regulated by several defense signaling molecules or different treatments. Further analysis revealed that the expression of OsWRKY03 was light dependent. Transcriptional activation activity of OsWRKY03 was also demonstrated by yeast functional assay. Transient expression of OsWRKY03-GFP fusion protein in onion epidermis cells showed that OsWRKY03 was a nuclear localized protein. OsNPR1 as well as several other pathogenesis-related genes, such as OsPR1b, phenylalanine ammonia-lyase (ZB8) and peroxidase (POX22.3), were induced in OsWRKY03-overexpressing transgenic plants. These results indicated that OsWRKY03 is located upstream of OsNPR1 as a transcriptional activator in salicylic acid (SA)-dependent or jasmonic acid (JA)-dependent defense signaling cascades.

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Section: Introductionmentioning

confidence: 99%

OsWRKY03, a rice transcriptional activator that functions in defense signaling pathway upstream of OsNPR1

et al. 2005

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“…Production of reactive oxygen species (ROS) at the cell surface is one of the earliest events detected in the plant defence response (Hammond-Kosack and Jones, 1996;Lamb and Dixon, 1997). The generation of superoxide anion (O 2 -) was first reported in incompatible interactions between potato and Phytophthora infestans (Doke et al, 1983).…”

Section: Introductionmentioning

confidence: 99%

“…However, in most studies the product of its rapid dismutation, hydrogen peroxide (H 2 O 2 ), is detected. Several roles for ROS have been proposed in plant defence, such as direct killing of the attacking pathogen, strengthening cell walls via oxidative crosslinking of cellwall glycoproteins, signalling, or as a cause of cell death (Dangl et al, 1996;Hammond-Kosack and Jones, 1996;Lamb and Dixon, 1997).…”

Section: Introductionmentioning

confidence: 99%

Six Arabidopsis thaliana homologues of the human respiratory burst oxidase (gp91^phox)

et al. 1998

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SummaryAn NADPH oxidase analogous to that in mammalian phagocytes has been hypothesized to produce reactive oxygen species (ROS) in the plant defence response. A. thaliana contains at least six gp91 phox homologues, designated AtrbohA-F (A. thaliana Respiratory Burst Oxidase Homologues), which map to different positions. Transcripts of three of these genes can be detected in healthy plants by RNA gel blot analyses. The Atrboh gene products are closely related to gp91 phox and the intron locations suggest a common evolutionary origin. A putative EF-hand Ca 2⍣ -binding motif in the extended N-terminal region of the Atrboh proteins suggests a direct regulatory effect of Ca 2⍣ on the activity of the NADPH oxidase in plants.

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“…Whereas some defense mechanisms are constitutive, others are induced during a pathogen attack (Hammond-Kosack and Jones, 1996). One of the best studied induced resistance responses is the systemic acquired resistance (SAR) that is triggered by pathogeninduced localized necrosis (Kuc, 1982).…”

Section: Introductionmentioning

confidence: 99%

“…Salicylic acid (SA) has been shown to be involved in the signaling of the SAR response (Hammond-Kosack and Jones, 1996). During SAR formation, SA concentration increases throughout the plant.…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of signal transduction mutants of Arabidopsis thaliana that constitutively activate the octadecanoid pathway and form necrotic microlesions

et al. 2001

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Summary Thionins are a group of antimicrobial polypeptides that form part of the plant's defense mechanism against pathogens. The Thi 2.1 thionin gene of Arabidopsis thaliana has been shown to be inducible by jasmonic acid (JA), an oxylipin‐like hormone derived from oxygenated linolenic acid and synthesized via the octadecanoid pathway. The JA‐dependent regulation of the Thi 2.1 gene has been exploited for setting up a genetic screen for the isolation of signal transduction mutants that constitutively express the Thi 2.1 gene. Ten cet‐mutants have been isolated which showed a constitutive expression of the thionin gene. Allelism tests revealed that they represent at least five different loci. Some mutants are dominant, others recessive, but all cet mutations behaved as monogenic traits when backcrossed with Thi 2.1‐GUS plants. Some of the mutants overproduce JA and its bioactive precursor 12‐oxophytodienoic acid (OPDA) up to 40‐fold while others have the same low levels as the control wildtype plants. Two of the mutants showed a strong induction of both the salicylic acid (SA)‐ and the JA‐dependent signaling pathways, while the majority seems to be affected only in the octadecanoid pathway. The Thi 2.1 thionin gene and the Pdf 1.2 defensin gene are activated independently, though both are regulated by JA. The cet‐mutants, except for one, also show a spontaneous leaf cell necrosis, a reaction often associated with the systemic acquired resistance (SAR) pathway.

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Resistance gene-dependent plant defense responses.

Cited by 1,380 publications

References 138 publications

OsWRKY03, a rice transcriptional activator that functions in defense signaling pathway upstream of OsNPR1

OsWRKY03, a rice transcriptional activator that functions in defense signaling pathway upstream of OsNPR1

Six Arabidopsis thaliana homologues of the human respiratory burst oxidase (gp91^phox)

Isolation and characterization of signal transduction mutants of Arabidopsis thaliana that constitutively activate the octadecanoid pathway and form necrotic microlesions

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Resistance gene-dependent plant defense responses.

Cited by 1,380 publications

References 138 publications

OsWRKY03, a rice transcriptional activator that functions in defense signaling pathway upstream of OsNPR1

OsWRKY03, a rice transcriptional activator that functions in defense signaling pathway upstream of OsNPR1

Six Arabidopsis thaliana homologues of the human respiratory burst oxidase (gp91phox)

Isolation and characterization of signal transduction mutants of Arabidopsis thaliana that constitutively activate the octadecanoid pathway and form necrotic microlesions

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Six Arabidopsis thaliana homologues of the human respiratory burst oxidase (gp91^phox)