Plant Respiratory Burst Oxidase Homologs Impinge on Wound Responsiveness and Development in<i>Lycopersicon esculentum</i> [W]

Sagi, Moshe; Davydov, Olga; Orazova, S. B.; Yesbergenova, Zhazira; Ophir, Ron; Stratmann, Johannes W.; Fluhr, Robert

doi:10.1105/tpc.019398

Cited by 259 publications

(183 citation statements)

References 49 publications

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“…Another possibility is that signals other than SA are perceived in the cell as a change in redox potential. Consistent with this notion, a role for reactive oxygen species as a signal for the hormonal regulation of various aspects of plant development has been proposed in recent studies (Sagi et al, 2004, and references therein). Also, TGA binding elements (also known as as1 or ocs elements) appear to mediate activation by hydrogen peroxide and by plant phytohormones such as auxin, SA, and jasmonic acid (Xiang et al, 1996, and references therein).…”

Section: Spatial Regulation Of Bop Activitymentioning

confidence: 50%

BLADE-ON-PETIOLE–Dependent Signaling Controls Leaf and Floral Patterning in Arabidopsis

et al. 2005

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NONEXPRESSOR OF PR GENES1 (NPR1) is a key regulator of the plant defense response known as systemic acquired resistance. Accumulation of the signal molecule salicylic acid (SA) leads to a change in intracellular redox potential, enabling NPR1 to enter the nucleus and interact with TGACG sequence-specific binding protein (TGA) transcription factors, which in turn bind to SA-responsive elements in the promoters of defense genes. Here, we show that two NPR1-like genes, BLADE-ON-PETIOLE1 (BOP1) and BOP2, function redundantly to control growth asymmetry, an important aspect of patterning in leaves and flowers. Phenotypes in the double mutant include leafy petioles, loss of floral organ abscission, and asymmetric flowers subtended by a bract. We demonstrate that BOP2 is localized to both the nucleus and the cytoplasm, but unlike NPR1, it is highly expressed in young floral meristems and in yeast interacts preferentially with the TGA transcription factor encoded by PERIANTHIA (PAN). In support of a biological relevance for this interaction, we show that bop1 bop2 and pan mutants share a pentamerous arrangement of first whorl floral organs, a patterning defect that is retained in bop1 bop2 pan triple mutants. Our data provide evidence that BOP proteins control patterning via direct interactions with TGA transcription factors and demonstrate that a signaling mechanism similar to that formally associated with plant defense is likely used for the control of developmental patterning.

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Section: Spatial Regulation Of Bop Activitymentioning

confidence: 50%

BLADE-ON-PETIOLE–Dependent Signaling Controls Leaf and Floral Patterning in Arabidopsis

et al. 2005

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“…Indeed, a number of downstream effects of P2 receptor activation, such as expression of MUC5AC, MMP-9 or IL-8 and stimulated cell migration, have been linked to activation of DUOX1 (87,105,107,108), suggesting a common association of DUOX with epithelial purinergic signaling. Intriguingly, NOX activation has similarly been associated with ATP-mediated purinergic signaling in several other mammalian cell types (160)(161)(162)(163)(164), and in NADPH oxidase-mediated wound responses in plants (165,166), which suggests that the general signaling pathway illustrated in Fig. 4 may be widely conserved as a common biological response mechanism to environmental stress.…”

Section: Mechanisms Of Duox Activation-the Presence Of Ef-hand Camentioning

confidence: 96%

NADPH oxidases in lung biology and pathology: Host defense enzymes, and more

Vliet

2008

Free Radical Biology and Medicine

187

192

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The deliberate production of reactive oxygen species (ROS) by phagocyte NADPH oxidase is widely appreciated as a critical component of antimicrobial host defense. Recently, additional homologs of NADPH oxidase (NOX) have been discovered throughout the animal and plant kingdoms, which appear to possess diverse functions in addition to host defense, including cell proliferation, differentiation, and regulation of gene expression. Several of these NOX homologs are also expressed within the respiratory tract, where they participate in innate host defense as well as in epithelial and inflammatory cell signaling and gene expression, and fibroblast and smooth muscle cell proliferation, in response to bacterial or viral infection and environmental stress. Inappropriate expression or activation of NOX/DUOX during various lung pathologies suggests their specific involvement in respiratory disease. This review summarizes the current state of knowledge regarding the general functional properties of mammalian NOX enzymes, and their specific importance in respiratory tract physiology and pathology.

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“…Superoxide can react with H 2 O 2 via a Haber-Weiss mechanism to form singlet oxygen (H 2 O 2 +O 2 2 → OH 2 + OH$ + 1 O 2 ; Kellogg and Fridovich, 1975;Khan and Kasha, 1994), although the efficiency of singlet oxygen production by these ROS in vivo is not known (MacManus-Spencer and McNeill, 2005). Nonetheless, the accumulation of superoxide and H 2 O 2 is readily detected in local or systemic wounded tissue (Sagi et al, 2004;Warwar et al, 2011) and in the immune responses (Dubiella et al, 2013). A possible source could be NADPH oxidase-like and superoxide dismutase activity, as has been shown for elicitor and salt-induced accumulation of ROS (Leshem et al, 2006;Ashtamker et al, 2007;Suzuki et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Singlet Oxygen Signatures Are Detected Independent of Light or Chloroplasts in Response to Multiple Stresses

et al. 2014

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The production of singlet oxygen is typically associated with inefficient dissipation of photosynthetic energy or can arise from light reactions as a result of accumulation of chlorophyll precursors as observed in fluorescent (flu)-like mutants. Such photodynamic production of singlet oxygen is thought to be involved in stress signaling and programmed cell death. Here we show that transcriptomes of multiple stresses, whether from light or dark treatments, were correlated with the transcriptome of the flu mutant. A core gene set of 118 genes, common to singlet oxygen, biotic and abiotic stresses was defined and confirmed to be activated photodynamically by the photosensitizer Rose Bengal. In addition, induction of the core gene set by abiotic and biotic selected stresses was shown to occur in the dark and in nonphotosynthetic tissue. Furthermore, when subjected to various biotic and abiotic stresses in the dark, the singlet oxygen-specific probe Singlet Oxygen Sensor Green detected rapid production of singlet oxygen in the Arabidopsis (Arabidopsis thaliana) root. Subcellular localization of Singlet Oxygen Sensor Green fluorescence showed its accumulation in mitochondria, peroxisomes, and the nucleus, suggesting several compartments as the possible origins or targets for singlet oxygen. Collectively, the results show that singlet oxygen can be produced by multiple stress pathways and can emanate from compartments other than the chloroplast in a light-independent manner. The results imply that the role of singlet oxygen in plant stress regulation and response is more ubiquitous than previously thought.

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Plant Respiratory Burst Oxidase Homologs Impinge on Wound Responsiveness and Development inLycopersicon esculentum [W]

Cited by 259 publications

References 49 publications

BLADE-ON-PETIOLE–Dependent Signaling Controls Leaf and Floral Patterning in Arabidopsis

BLADE-ON-PETIOLE–Dependent Signaling Controls Leaf and Floral Patterning in Arabidopsis

NADPH oxidases in lung biology and pathology: Host defense enzymes, and more

Singlet Oxygen Signatures Are Detected Independent of Light or Chloroplasts in Response to Multiple Stresses

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