Transgenic Production of Cytokinin Suppresses Bacterially Induced Hypersensitive Response Symptoms and Increases Antioxidative Enzyme Levels in <i>Nicotiana</i> spp.

Barna, B.; Smigocki, Ann C.; Baker, Jeffrey C.

doi:10.1094/phyto-98-11-1242

Cited by 36 publications

(24 citation statements)

References 32 publications

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“…Recent investigations provide support for the role of CKs as key regulators of plant defence response against non-CK-producing plant-pathogenic bacteria such as Pseudomonas syringae by suppressing bacterially induced hypersensitive response symptoms and by increasing antioxidative enzyme levels (Barna, Smigocki & Baker 2008;Choi et al 2010). However, the synthesis of CKs as a mechanism for successful invasion of plant tissues seems to be widespread in phytopathogenic bacteria, which commonly carry genes for CK synthesis in plasmids.…”

Section: Phytopathogenic Bacteriamentioning

confidence: 99%

“…Recent investigations provide support for the role of CKs as key regulators of plant defence response against non‐CK‐producing plant‐pathogenic bacteria such as Pseudomonas syringae by suppressing bacterially induced hypersensitive response symptoms and by increasing antioxidative enzyme levels (Barna, Smigocki & Baker ; Choi et al . ).…”

Section: Cytokinins As a Tool For Invading The Host Plantmentioning

confidence: 99%

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Cytokinins as key regulators in plant–microbe–insect interactions: connecting plant growth and defence

et al. 2013

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Summary1. Plant hormones play important roles in regulating plant growth and defence by mediating developmental processes and signalling networks involved in plant responses to a wide range of parasitic and mutualistic biotic interactions. 2. Plants are known to rapidly respond to pathogen and herbivore attack by reconfiguring their metabolism to reduce pathogen/herbivore food acquisition. This involves the production of defensive plant secondary compounds, but also an alteration of the plant primary metabolism to fuel the energetic requirements of the direct defence. 3. Cytokinins are plant hormones that play a key role in plant morphology, plant defence, leaf senescence and source-sink relationships. They are involved in numerous plant-biotic interactions. 4. These phytohormones may have been the target of arthropods and pathogens over the course of the evolutionary arms race between plants and their biotic partners to hijack the plant metabolism, control its physiology and/or morphology and successfully invade the plant. In the case of arthropods, cytokinin-induced phenotypes can be mediated by their bacterial symbionts, giving rise to intricate plant-microbe-insect interactions. 5. Cytokinin-mediated effects strongly impact not only plant growth and defence but also the whole community of insect and pathogen species sharing the same plant by facilitating or preventing plant invasion. This suggests that cytokinins (CKs) are key regulators of the plant growth-defence trade-off and highlights the complexity of the finely balanced responses that plants use while facing both invaders and mutualists.

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Section: Phytopathogenic Bacteriamentioning

confidence: 99%

Section: Cytokinins As a Tool For Invading The Host Plantmentioning

confidence: 99%

Cytokinins as key regulators in plant–microbe–insect interactions: connecting plant growth and defence

et al. 2013

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“…Cytokinins are involved in the modulation of defence mechanisms, including the induction of resistance against viruses (Pogany et al, 2004;Sano et al, 1996), suppression of the HR (Barna et al, 2008) and salicylic acid induction in wounding responses (Sano et al, 1996). In addition, cytokinins can act synergistically with salicylic acid signalling (Pieterse et al, 2012).…”

Section: Amps and Plant Defence Hormonesmentioning

confidence: 99%

Cooperative interaction of antimicrobial peptides with the interrelated immune pathways in plants

Moghaddam

Vilcinskas

Rahnamaeian

2015

Molecular Plant Pathology

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SUMMARYPlants express a diverse repertoire of functionally and structurally distinct antimicrobial peptides (AMPs) which provide innate immunity by acting directly against a wide range of pathogens. AMPs are expressed in nearly all plant organs, either constitutively or in response to microbial infections. In addition to their direct activity, they also contribute to plant immunity by modulating defence responses resulting from pathogen-associated molecular pattern/effector-triggered immunity, and also interact with other AMPs and pathways involving mitogen-activated protein kinases, reactive oxygen species, hormonal cross-talk and sugar signalling. Such links among AMPs and defence signalling pathways are poorly understood and there is no clear model for their interactions. This article provides a critical review of the empirical data to shed light on the wider role of AMPs in the robust and resource-effective defence responses of plants.

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“…Reports of the role of CKs in plant disease resistance are still scarce. Elevated CK levels were associated to resistance against viruses [130,131] and suppression of the HR in tobacco [132]. Plant-derived CKs were also shown to promote resistance of Arabidopsis to Pseudomonas syringae pv.…”

Section: Modulation Of Phytoalexin Accumulation Through Engineerinmentioning

confidence: 99%

Modulation of Phytoalexin Biosynthesis in Engineered Plants for Disease Resistance

Jeandet

Clément

Courot

et al. 2013

IJMS

139

119

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Phytoalexins are antimicrobial substances of low molecular weight produced by plants in response to infection or stress, which form part of their active defense mechanisms. Starting in the 1950’s, research on phytoalexins has begun with biochemistry and bio-organic chemistry, resulting in the determination of their structure, their biological activity as well as mechanisms of their synthesis and their catabolism by microorganisms. Elucidation of the biosynthesis of numerous phytoalexins has permitted the use of molecular biology tools for the exploration of the genes encoding enzymes of their synthesis pathways and their regulators. Genetic manipulation of phytoalexins has been investigated to increase the disease resistance of plants. The first example of a disease resistance resulting from foreign phytoalexin expression in a novel plant has concerned a phytoalexin from grapevine which was transferred to tobacco. Transformations were then operated to investigate the potential of other phytoalexin biosynthetic genes to confer resistance to pathogens. Unexpectedly, engineering phytoalexins for disease resistance in plants seem to have been limited to exploiting only a few phytoalexin biosynthetic genes, especially those encoding stilbenes and some isoflavonoids. Research has rather focused on indirect approaches which allow modulation of the accumulation of phytoalexin employing transcriptional regulators or components of upstream regulatory pathways. Genetic approaches using gain- or less-of functions in phytoalexin engineering together with modulation of phytoalexin accumulation through molecular engineering of plant hormones and defense-related marker and elicitor genes have been reviewed.

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Transgenic Production of Cytokinin Suppresses Bacterially Induced Hypersensitive Response Symptoms and Increases Antioxidative Enzyme Levels in Nicotiana spp.

Cited by 36 publications

References 32 publications

Cytokinins as key regulators in plant–microbe–insect interactions: connecting plant growth and defence

Cytokinins as key regulators in plant–microbe–insect interactions: connecting plant growth and defence

Cooperative interaction of antimicrobial peptides with the interrelated immune pathways in plants

Modulation of Phytoalexin Biosynthesis in Engineered Plants for Disease Resistance

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