Seeking the Role of NO in Breaking Seed Dormancy

Giba, Zlatko; Grubišić, Dragoljub; Konjević, Radomir

doi:10.1007/7089_2006_086

Cited by 21 publications

(13 citation statements)

References 86 publications

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“…NO in plants may just serve as an intermediate in the synthesis of an unknown signaling molecule. This possibility is supported by the fact that N N , and NO 2 sometimes display similar effects to NO on many phenomena, including germination [4]. Although the present study has suggested the require ment of AtGLB3 for seed germination at high temper ature, we feel it premature to conclude the occurrence of the NO scavenging function of AtGLB3.…”

Section: Function Of Atglb3 In Seed Germinationmentioning

confidence: 51%

“…It is known that recommended depth for sowing seeds in the soils differs among plant species. Due to rhizosphere bacte ria, especially nitrifying bacteria, O 2 availability decreases with depth while NO concentrations may increase [4]. The scheme explains well such trends in terms of species specific optimum NO concentration for seed germination.…”

Section: Balance Between the Oppositesmentioning

confidence: 67%

“…Also, NO has been reported to participate in seed germination [4]. Many studies have shown that chemical NO donors, includ ing SNP and S nitroso N acetylpenicillamine, stim ulate seed germination in lettuce (Lactuca sativa) [18], A. thaliana [7], and tomato (Lycopersicon esculentum) [8].…”

Section: Effects Of No On Seed Germinationmentioning

confidence: 99%

“…Thus, living organisms must strictly control NO level to tune a fine balance between the beneficial (signal ing) and harmful (deleterious effect) actions of NO [5]. In this context, the internal concentration of NO must be regulated during germination; there should be an optimum range of NO concentration for each plant species [4]. As the sources of NO production in seeds, nitrate reductase (NR) and putative NO synthase (NOS) like enzyme have been reported.…”

Section: Effects Of No On Seed Germinationmentioning

confidence: 99%

“…However, there is no consensus idea to account for the heat tolerance of seed germination. Recent studies have suggested that nitric oxide (NO) is involved in the process of germination [4]. NO is a gaseous free radi cal that had long been known as a harmful air pollutant produced thorough the combustion of fossil fuels [5].…”

Section: Introductionmentioning

confidence: 99%

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Effects of nitric oxide scavengers on thermoinhibition of seed germination in Arabidopsis thaliana

Hossain

Itoh

Yoshimura

et al. 2010

Russ J Plant Physiol

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Abstract-Plant seeds sometimes do not germinate at elevated temperature. The thermoinhibition mecha nisms of seed germination have yet not revealed. Here we describe a chemical approach to improve seed ger mination at high temperature. We compared the temperature response of germination between wild type Arabidopsis thaliana and its T DNA insertion mutant ΔAtGLB3 that lacks a functional gene encoding GLB3, a homologue of bacterial truncated Hb (trHb). Under optimal temperature conditions (e.g. 22°C), the seeds of ΔAtGLB3 and the wild type germinated at a frequency near 100%. In contrast, at 32°C the seeds of ΔAtGLB3 did not germinate while wild type seeds retained the same high germination frequency. The ger mination of ΔAtGLB3 at 32°C was partially restored by supplementation with the nitric oxide specific scavenger 2 (4 carboxyphenyl) 4,4,5,5 tetramethylimidazoline 1 oxyl 3 oxide (carboxy PTIO; cPTIO), 3 (3,4 dihydroxycinnamoyl)quinic acid, bovine serum Hb, or isoprene. The results presented in this study suggest that chemical scavengers for reactive nitrogen species potentially improve seed germination at high temperature. Key words: Arabidopsis thaliana germination hemoglobin high temperature nitric oxide DOI: 10.1134/S1021443710020093Abbreviations: CGA-chlorogenic acid; cPTIO-2 (4 carbox yphenyl) 4,4,5,5 tetramethylimidazoline 1 oxyl 3 oxide; Hbhemoglobin; HSP-heat shock protein; MS-Murashige and Skoog nutrient medium; NOS-NO synthase; RNS-reactive nitrogen species; SNP-sodium nitroprusside.

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Section: Function Of Atglb3 In Seed Germinationmentioning

confidence: 51%

Section: Balance Between the Oppositesmentioning

confidence: 67%

Section: Effects Of No On Seed Germinationmentioning

confidence: 99%

Section: Effects Of No On Seed Germinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of nitric oxide scavengers on thermoinhibition of seed germination in Arabidopsis thaliana

Hossain

Itoh

Yoshimura

et al. 2010

Russ J Plant Physiol

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Nitric Oxide as a Signal Molecule in Intracellular and Extracellular Bacteria‐plant Interactions

Palma¹,

Lamattina²,

Creus³

2011

Ecological Aspects of Nitrogen Metabolism in Plants

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Nitrate Reductase and Nitric Oxide

Kaiser¹,

Planchet

Rümer³

2018

Annual Plant Reviews Online

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Plants produce NO either by reduction of nitrite or by oxidation of more reduced N forms. Reductive NO formation from nitrite can be enzymatic via nitrate reductase (NR), mitochondrial electron transport or non‐enzymatic at acidic pH. In any case, NR is the major (if not the only) source for endogenous nitrite in plants. Therefore, NR properties and regulation are summarized here with respect to NO production. Reductive NO formation from l ‐arginine or from hydroxylamines is also considered. Problems in quantifying NO production from nitrite and potential roles of NO in plants are discussed in context with nitrate reduction.

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Seeking the Role of NO in Breaking Seed Dormancy

Cited by 21 publications

References 86 publications

Effects of nitric oxide scavengers on thermoinhibition of seed germination in Arabidopsis thaliana

Effects of nitric oxide scavengers on thermoinhibition of seed germination in Arabidopsis thaliana

Nitric Oxide as a Signal Molecule in Intracellular and Extracellular Bacteria‐plant Interactions

Nitrate Reductase and Nitric Oxide

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