Nitric oxide production by the differentiating xylem of <i>Zinnia elegans</i>

Gabaldón, Carlos; Ros, L. V. Gómez; Pedreño, María A.; Barceló, A. Ros

doi:10.1111/j.1469-8137.2004.01230.x

Cited by 120 publications

(96 citation statements)

References 54 publications

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“…Recently, nitric oxide (NO) has been shown to serve as an important signal molecule involved in many aspects of developmental processes, including floral transition, root growth, root gravitropism, adventitious root formation, xylogenesis, seed germination, and orientation of pollen tube growth (Beligni and Lamattina, 2000;Pagnussat et al, 2002;He et al, 2004;Prado et al, 2004;Gabaldó n et al, 2005;Stohr and Stremlau, 2006). Increasing evidence points to a role for NO as an essential component in ABA signaling in guard cells Lamattina, 2001, 2002;Neill et al, 2002).…”

mentioning

confidence: 99%

A Signaling Pathway Linking Nitric Oxide Production to Heterotrimeric G Protein and Hydrogen Peroxide Regulates Extracellular Calmodulin Induction of Stomatal Closure in Arabidopsis

Liu

et al. 2009

Plant Physiology

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Extracellular calmodulin (ExtCaM) regulates stomatal movement by eliciting a cascade of intracellular signaling events including heterotrimeric G protein, hydrogen peroxide (H 2 O 2 ), and Ca 2+ . However, the ExtCaM-mediated guard cell signaling pathway remains poorly understood. In this report, we show that Arabidopsis (Arabidopsis thaliana) NITRIC OXIDE ASSOCIATED1 (AtNOA1)-dependent nitric oxide (NO) accumulation plays a crucial role in ExtCaM-induced stomatal closure. ExtCaM triggered a significant increase in NO levels associated with stomatal closure in the wild type, but both effects were abolished in the Atnoa1 mutant. Furthermore, we found that ExtCaM-mediated NO generation is regulated by GPA1, the Ga-subunit of heterotrimeric G protein. The ExtCaM-dependent NO accumulation was nullified in gpa1 knockout mutants but enhanced by overexpression of a constitutively active form of GPA1 (cGa). In addition, cGa Atnoa1 and gpa1-2 Atnoa1 double mutants exhibited a similar response as did Atnoa1. The defect in gpa1 was rescued by overexpression of AtNOA1. Finally, we demonstrated that G protein activation of NO production depends on H 2 O 2 . Reduced H 2 O 2 levels in guard cells blocked the stomatal response of cGa lines, whereas exogenously applied H 2 O 2 rescued the defect in ExtCaM-mediated stomatal closure in gpa1 mutants. Moreover, the atrbohD/F mutant, which lacks the NADPH oxidase activity in guard cells, had impaired NO generation in response to ExtCaM, and H 2 O 2 -induced stomatal closure and NO accumulation were greatly impaired in Atnoa1. These findings have established a signaling pathway leading to ExtCaM-induced stomatal closure, which involves GPA1-dependent activation of H 2 O 2 production and subsequent AtNOA1-dependent NO accumulation.Plant guard cells control opening and closure of the stomata in response to phytohormones (e.g. abscisic acid [ABA]) and various environmental signals such as light and temperature, thereby regulating gas exchange for photosynthesis and water status via transpiration . Cytosolic calcium ([Ca 2+ ] i ) has been shown to be a key second messenger that changes in response to multiple stimuli in guard cells (McAinsh et al., 1995;Grabov and Blatt, 1998;Wood et al., 2000). A large proportion of Ca 2+ is localized in extracellular space. It has been shown that external Ca 2+ concentration ([Ca 2+ ] o ) promotes stomatal closure and induces oscillation in [Ca 2+ ] i in guard cells (MacRobbie, 1992;McAinsh et al., 1995;Allen et al., 2001 Calmodulin is a well-known Ca 2+ sensor that is activated upon binding of Ca 2+ . It has been shown that calmodulin exists not only intracellularly but also extracellularly in many plant species

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mentioning

confidence: 99%

A Signaling Pathway Linking Nitric Oxide Production to Heterotrimeric G Protein and Hydrogen Peroxide Regulates Extracellular Calmodulin Induction of Stomatal Closure in Arabidopsis

Liu

et al. 2009

Plant Physiology

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“…Further, SNP treatment enhanced the accumulation of total dry matter content and partitioning towards different plant parts in chick pea (Cicer arietinum) (Chohan et al, 2012). NO is also known to be involved in vegetative growth processes of the shoot (Zhang et al, 2003;An et al, 2005), cell division (Otvos et al, 2005) and xylem differentiation (Gabaldon et al, 2005). Direct impact of NO on the cytokinin signaling pathway has recently been uncovered (Feng et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Exogenous nitric oxide donor sodium nitroprusside ameliorates root architecture and growth performance in young budding polybagged plants of rubber (<em>Hevea brasiliensis</em>)

Nayanakantha

Pathirana

Senevirathna

et al. 2017

J Rubber Res Inst Sri Lanka

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“…[11][12][13][14]. NO has also been shown to be implicated in the induction of PCD in animal cells, 15 in yeast, 16 as well as in plant cells, in which it is required for tracheid differentiation 17 or HR activation. 18,19 Interestingly in the latter case, the balance between NO and H 2 O 2 production appears to be crucial to induce cell death.…”

Section: Dhs Induces a Rapid No Production In Tobacco By-2 Cellsmentioning

confidence: 99%

Nitric oxide production is not required for dihydrosphingosine-induced cell death in tobacco BY-2 cells

Silva¹,

Lachaud²,

Cotelle³

et al. 2011

Plant Signaling & Behavior

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Sphinganine or dihydrosphingosine (d18:0, DHS), one of the most abundant free sphingoid Long Chain Base (LCB) in plants, is known to induce a calcium-dependent programmed cell death (PCD) in tobacco BY-2 cells. We have recently shown that DHS triggers a production of H 2 O 2 , via the activation of NADPH oxidase(s). However, this production of H 2 O 2 is not correlated with the DHS-induced cell death but would rather be associated with basal cell defense mechanisms. In the present study, we extend our current knowledge of the DHS signaling pathway, by demonstrating that DHS also promotes a production of nitric oxide (NO) in tobacco BY-2 cells. As for H 2 O 2 , this NO production is not necessary for cell death induction.These last few years, it has been demonstrated in plants that long chain bases (LCBs), the sphingolipid precursors, are important regulators of different cellular processes including programmed cell death (PCD).1-3 Indeed, plant treatment with fumonisin B1 or AAL toxin, two mycotoxins that disrupt sphingolipid metabolism, leads to an accumulation of the dihydrosphingosine (d18:0, DHS), one of the most abundant free LCB in plants and correlatively to the induction of cell death symptoms.4,5 A more recent study shows a rapid and sustained increase of phytosphingosine (t18:0), due to a de novo synthesis from DHS, when Arabidopsis thaliana leaves are inoculated with the avirulent strain Pseudomonas syringae pv. tomato (avrRpm1), known to induce a localized PCD called

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Nitric oxide production by the differentiating xylem of Zinnia elegans

Cited by 120 publications

References 54 publications

A Signaling Pathway Linking Nitric Oxide Production to Heterotrimeric G Protein and Hydrogen Peroxide Regulates Extracellular Calmodulin Induction of Stomatal Closure in Arabidopsis

A Signaling Pathway Linking Nitric Oxide Production to Heterotrimeric G Protein and Hydrogen Peroxide Regulates Extracellular Calmodulin Induction of Stomatal Closure in Arabidopsis

Exogenous nitric oxide donor sodium nitroprusside ameliorates root architecture and growth performance in young budding polybagged plants of rubber (<em>Hevea brasiliensis</em>)

Nitric oxide production is not required for dihydrosphingosine-induced cell death in tobacco BY-2 cells

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