Nitric Oxide Mediates the Hormonal Control of Crassulacean Acid Metabolism Expression in Young Pineapple Plants

Freschi, Luciano; Rodrigues, Maria Aurineide; Domingues, Douglas Silva; Purgatto, Eduardo; Sluys, Marie‐Anne Van; Magalhães, J. R.; Kaiser, Werner M.; Mercier, Helenice

doi:10.1104/pp.109.151613

Cited by 81 publications

(59 citation statements)

References 63 publications

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“…NO gas mixtures were bubbled through a flask containing 500 mM KOH to eliminate any nitrous acid traces and humidify the gas mixture. A continuous flow (100 mL min 21 ) was maintained throughout the experiments, and final NO concentration was routinely checked by injecting 1-mL aliquots of each magenta box's internal atmosphere into a chemiluminescence detector (CLD 88ep; Eco-Physics), as described by Freschi et al (2010).…”

Section: Growth Conditions and Treatmentsmentioning

confidence: 99%

Nitric Oxide, Ethylene, and Auxin Cross Talk Mediates Greening and Plastid Development in Deetiolating Tomato Seedlings

et al. 2016

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The transition from etiolated to green seedlings involves the conversion of etioplasts into mature chloroplasts via a multifaceted, light-driven process comprising multiple, tightly coordinated signaling networks. Here, we demonstrate that light-induced greening and chloroplast differentiation in tomato (Solanum lycopersicum) seedlings are mediated by an intricate cross talk among phytochromes, nitric oxide (NO), ethylene, and auxins. Genetic and pharmacological evidence indicated that either endogenously produced or exogenously applied NO promotes seedling greening by repressing ethylene biosynthesis and inducing auxin accumulation in tomato cotyledons. Analysis performed in hormonal tomato mutants also demonstrated that NO production itself is negatively and positively regulated by ethylene and auxins, respectively. Representing a major biosynthetic source of NO in tomato cotyledons, nitrate reductase was shown to be under strict control of both phytochrome and hormonal signals. A close NO-phytochrome interaction was revealed by the almost complete recovery of the etiolated phenotype of red light-grown seedlings of the tomato phytochrome-deficient aurea mutant upon NO fumigation. In this mutant, NO supplementation induced cotyledon greening, chloroplast differentiation, and hormonal and gene expression alterations similar to those detected in light-exposed wild-type seedlings. NO negatively impacted the transcript accumulation of genes encoding phytochromes, photomorphogenesis-repressor factors, and plastid division proteins, revealing that this free radical can mimic transcriptional changes typically triggered by phytochrome-dependent light perception. Therefore, our data indicate that negative and positive regulatory feedback loops orchestrate ethylene-NO and auxin-NO interactions, respectively, during the conversion of colorless etiolated seedlings into green, photosynthetically competent young plants.

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Section: Growth Conditions and Treatmentsmentioning

confidence: 99%

Nitric Oxide, Ethylene, and Auxin Cross Talk Mediates Greening and Plastid Development in Deetiolating Tomato Seedlings

et al. 2016

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“…Moreover, the calcium/calmodulin system and mitogen-activated protein kinases (MAPKs) have also been demonstrated as key downstream elements involved in ABA or H 2 O 2 -induced NO signaling during plant antioxidant defense mechanisms [22,23]. Cross talk between NO and ABA in the ABA-dependant signaling network up-regulated the cytosolic Ca 2+ to regulate Crassulacean acid metabolism (CAM) expression in bromeliads that signiicantly improved plant tolerance in a water-limited environment [21,24]. It seems that ABA-induced NO production is associated with increased nitrate reductase (NR) activity that controls stomatal movements in Arabidopsis [19] and CAM expression in bromeliads [24].…”

Section: No-phytohormone Cross Talk Under Drought Stressmentioning

confidence: 99%

“…Cross talk between NO and ABA in the ABA-dependant signaling network up-regulated the cytosolic Ca 2+ to regulate Crassulacean acid metabolism (CAM) expression in bromeliads that signiicantly improved plant tolerance in a water-limited environment [21,24]. It seems that ABA-induced NO production is associated with increased nitrate reductase (NR) activity that controls stomatal movements in Arabidopsis [19] and CAM expression in bromeliads [24]. The expression of CYP707A2 gene, induced by NO biosynthesis, during seed germination initiated ABA catabolism and increased ABA levels to enhance plant resistance against drought stress [11,25].…”

Section: No-phytohormone Cross Talk Under Drought Stressmentioning

confidence: 99%

Cross Talk between Nitric Oxide and Phytohormones Regulate Plant Development during Abiotic Stresses

Nawaz¹,

Shabbir²,

Shahbaz³

et al. 2017

Phytohormones - Signaling Mechanisms and Crosstalk in Plant Development and Stress Responses

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Plants, being sessile, are concurrently exposed to various biotic and abiotic stresses. The perception of stress signals in plants involves a wide spectrum of signal transduction pathways that interact to induce tolerance against adverse environmental conditions. This functional overlapping among various stress signaling cascades also leads to the expression of genes that regulate biosynthesis or action of other hormones. Phytohormonal signals, activated by both developmental and environmental responses, play a crucial role to develop stress tolerance in plants. Nitric oxide (NO) is one of the major players in plant signaling networks. Emerging evidence supports that NO interplays with signaling pathways of auxins, gibberellins, abscisic acid, ethylene, jasmonic acid, brassinosteroids, and other plant hormones to control metabolism, growth, and development in plants. This chapter focuses on the current state of knowledge of cross talk between signaling pathways of NO and phytohormones in plants exposed to various abiotic stresses.

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“…For instance, NO functions in auxin-induced signaling pathways driving root growth and developmental processes, operating downstream of auxin through a linear signaling pathway (14). NO acts downstream of abscisic acid in controlling both induction of stomatal closure and inhibition of stomatal opening (6,15,16). In addition, NO is also involved in ethylene, gibberellin, salicylic acid, and jasmonic acid signaling (17)(18)(19)(20).…”

mentioning

confidence: 99%

Cytokinins can act as suppressors of nitric oxide in Arabidopsis

Liu

Kong

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

107

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Maintaining nitric oxide (NO) homeostasis is essential for normal plant physiological processes. However, very little is known about the mechanisms of NO modulation in plants. Here, we report a unique mechanism for the catabolism of NO based on the reaction with the plant hormone cytokinin. We screened for NO-insensitive mutants in Arabidopsis and isolated two allelic lines, cnu1-1 and 1-2 (continuous NO-unstressed 1), that were identified as the previously reported altered meristem program 1 (amp1) and as having elevated levels of cytokinins. A double mutant of cnu1-2 and nitric oxide overexpression 1 (nox1) reduced the severity of the phenotypes ascribed to excess NO levels as did treating the nox1 line with trans-zeatin, the predominant form of cytokinin in Arabidopsis. We further showed that peroxinitrite, an active NO derivative, can react with zeatin in vitro, which together with the results in vivo suggests that cytokinins suppress the action of NO most likely through direct interaction between them, leading to the reduction of endogenous NO levels. These results provide insights into NO signaling and regulation of its bioactivity in plants.is one of the most widespread signaling molecules in living organisms (1, 2). In plants, NO is involved in the regulation of numerous physiological processes during growth and development and is also an important modulator of disease resistance (2-4). Several laboratories discovered that NO is produced not only from nitrate/nitrite but also from L-arginine (L-Arg), which is the main substrate for NO synthesis in animals (4-6). NO is also a widespread atmospheric pollutant. Therefore, this gas not only is a pivotal player in signal transduction but also has the potential to exert significant deleterious effects by being a pollutant. As an inevitable result, increased NO levels in the atmosphere can influence multiple NO-regulated processes in organisms. Despite the wealth of information gathered from analyses of NO functioning in plants, the molecular processes underlying NO effects in plants are still largely unknown.NO differs from other signaling molecules by being reactive, lipophilic, and volatile. In fact, chemically, NO is a free radical, and such a reactive molecule is unlikely to interact specifically with a single specific receptor (3). In animals, NO appears to act through the chemical modification of targets. NO can bind to transition metals of metalloproteins (metal nitrosylation). It also can bind covalently to cysteine (S-nitrosylation) and tyrosine (tyrosine nitration) residues (3,7,8). Such specific protein modifications are emerging as key mechanistic intermediates for NO signal transduction. In plant cells, NO has also been found to regulate the activity of various target proteins through S-or metal-nitrosylation and probably through tyrosine nitration as well (9-13).Furthermore, it has been shown that NO takes part in different phytohormone signaling pathways, frequently under the control of hormonal stimuli. For instance, NO functions in auxin-induc...

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Nitric Oxide Mediates the Hormonal Control of Crassulacean Acid Metabolism Expression in Young Pineapple Plants

Cited by 81 publications

References 63 publications

Nitric Oxide, Ethylene, and Auxin Cross Talk Mediates Greening and Plastid Development in Deetiolating Tomato Seedlings

Nitric Oxide, Ethylene, and Auxin Cross Talk Mediates Greening and Plastid Development in Deetiolating Tomato Seedlings

Cross Talk between Nitric Oxide and Phytohormones Regulate Plant Development during Abiotic Stresses

Cytokinins can act as suppressors of nitric oxide in Arabidopsis

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