Regulation of nitrite reductase and its relationship to the regulation of nitrate reductase in cultured tobacco cells☆

Kelker, H C; Filner, Philip

doi:10.1016/0304-4165(71)90093-6

Cited by 55 publications

(15 citation statements)

References 21 publications

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“…largely inhibited by tungstate, NiR formation was not inhibited in wheat embryos (7) or in tobacco cells (13), further indicating that NO3-may induce NiR directly without being reduced to NO2-. Recently, Lahners et al (15) reported that both NO3-and N02-induced NiR-mRNA in leaves of maize seedlings.…”

mentioning

confidence: 83%

Role of Nitrate and Nitrite in the Induction of Nitrite Reductase in Leaves of Barley Seedlings

Aslam¹,

Huffaker²

1989

Plant Physiol.

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The role of N03-and N02-in the induction of nitrite reductase (NiR) activity in detached leaves of 8-day-old barley (Hordeum vulgare L.) seedlings was investigated. Barley leaves contained 6 to 8 micromoles N02-/gram fresh weight x hour of endogenous NiR activity when grown in N-free solutions. Supply of both N02-and NO3-induced the enzyme activity above the endogenous levels (5 and 10 times, respectively at 10 millimolar NO2-and N03-over a 24 hour period). In N03-supplied leaves, NiR induction occurred at an ambient N03-concentration of as low as 0.05 millimolar; however, no NiR induction was found in leaves supplied with NO2-until the ambient NO2-concentration was 0.5 millimolar. Nitrate accumulated in N02-fed leaves. The amount of NO3-accumulating in N02-fed leaves induced similar levels of NiR as did equivalent amounts of NO3-accumulafing in N03--fed leaves. Induction of NiR in N02--fed leaves was not seen until N03-was detectable (30 nanomoles/gram fresh weight) in the leaves. The internal concentrations of N03-, irrespective of N source, were highly correlated with the levels of NiR induced.When the reduction of N03-to NO2-was inhibited by W042-, the induction of NiR was inhibited only partially. The results indicate that in barley leaves NiR is induced by N03-directly, i.e. without being reduced to N02-, and that absorbed NO2-induces the enzyme activity indirectly after being oxidized to N03-within the leaf.

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confidence: 83%

Role of Nitrate and Nitrite in the Induction of Nitrite Reductase in Leaves of Barley Seedlings

Aslam¹,

Huffaker²

1989

Plant Physiol.

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“…Availability of soil N for plant use was estimated by measuring nitrate (NO 3 -) reductase activity (NRA), which measures assimilation of nitrate (Kelker and Filner 1971;Högberg et al 1986). On 18 August 2009, two separate heartleaf arnica (Arnica cordifolia (Hook.))…”

Section: Forb N Usementioning

confidence: 99%

Post-fire erosion control mulches alter belowground processes and nitrate reductase activity of a perennial forb, heartleaf arnica (Arnica cordifolia)

Berryman¹,

Morgan²,

Robichaud³

et al. 2014

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“…Recent studies have indicated that NR is highly regulated by complex transcriptional and posttranslational mechanisms (Campbell 1999;Huber et al 1996;Kaiser et al 1999). The NR enzyme is degraded after several hours in the dark (Kelker & Filner 1971). There are inhibitor proteins called 14-3-3 proteins that inactivate NR in response to the Ca 2+ -dependent signal transduction system (Athwal et al 1998;Moorhead et al 1996).…”

Section: Perspectivesmentioning

confidence: 99%

Nitrite–dependent nitric oxide production pathway: implications for involvement of active nitrogen species in photoinhibitionin vivo

Yamasaki

2000

Phil. Trans. R. Soc. Lond. B

219

150

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Air pollution studies have shown that nitric oxide (NO), a gaseous free radical, is a potent photosynthetic inhibitor that reduces CO 2 uptake activity in leaves. It is now recognized that NO is not only an air pollutant but also an endogenously produced metabolite, which may play a role in regulating plant cell functions. Although many studies have suggested the presence of mammalian-type NO synthase (NOS) in plants, the source of NO is still not clear. There has been a number of studies indicating that plant cells possess a nitrite-dependent NO production pathway which can be distinguished from the NOS-mediated reaction. Nitrate reductase (NR) has been recently found to be capable of producing NO through oneelectron reduction of nitrite using NAD(P)H as an electron donor. This review focuses on current understanding of the mechanism for the nitrite-dependent NO production in plants. Impacts of NO produced by NR on photosynthesis are discussed in association with photo-oxidative stress in leaves.

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Regulation of nitrite reductase and its relationship to the regulation of nitrate reductase in cultured tobacco cells☆

Cited by 55 publications

References 21 publications

Role of Nitrate and Nitrite in the Induction of Nitrite Reductase in Leaves of Barley Seedlings

Role of Nitrate and Nitrite in the Induction of Nitrite Reductase in Leaves of Barley Seedlings

Post-fire erosion control mulches alter belowground processes and nitrate reductase activity of a perennial forb, heartleaf arnica (Arnica cordifolia)

Nitrite–dependent nitric oxide production pathway: implications for involvement of active nitrogen species in photoinhibitionin vivo

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