Hydrogen Peroxide and Nitric Oxide Signaling Network

Niu, Lijuan; Yu, Jiangnan; Liao, Weibiao; Yu, Jian

doi:10.1007/978-3-030-11129-8_2

Cited by 3 publications

(2 citation statements)

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“…Furthermore, rehydrating pollen from various angiosperm and gymnosperm plant species was observed to produce intracellular gaseous nitric oxide (NO), which can migrate into the extracellular matrix where it could interact with surrounding cells (McInnis et al 2006;Bright et al 2009;Wilson et al 2009;Pasqualini et al 2015;Jiménez-Quesada et al 2017). Nitric oxide is a reactive oxygen species common in plant tissues and a key signalling molecule in an array of plant physiological processes (Niu et al 2019). In plant sexual reproduction, NO plays a role in pollen germination as it acts as a negative chemotropic agent of pollen tube growth and orientation towards the ovule (Prado et al 2004;Wang et al 2009;Wilson et al 2009;Šírová et al 2011;Domingos et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…In plant sexual reproduction, NO plays a role in pollen germination as it acts as a negative chemotropic agent of pollen tube growth and orientation towards the ovule (Prado et al 2004;Wang et al 2009;Wilson et al 2009;Šírová et al 2011;Domingos et al 2015). The source of NO in plants is however still matter of debate and multiple oxidative or reductive pathways might coexist (Domingos et al 2015;Niu et al 2019;León and Costa-Broseta 2020). The enzymatic transformation of nitrate (NO3 -) by nitrate reductase oxidases through a two-step reaction with nitrite (NO2 -) as an intermediate product likely is the prevailing mechanism active in plant tissues under oxic conditions.…”

Section: Introductionmentioning

confidence: 99%

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In vitro nitrogen transformations by pollen from temperate tree species

Verstraeten,

Gottardini,

Bruffaerts

et al. 2024

Preprint

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The effects of pollen on dissolved inorganic nitrogen (DIN) compounds in throughfall water are not completely understood. We conducted a 7-day leaching experiment with pollen from silver birch (including a sterilized control), European beech, sessile oak, Scots pine, Corsican black pine and Norway spruce using an immersion medium containing nitrate (11.295 mg N l). Within 2 hours, pollen released substantial amounts of potassium (K), phosphate (PO) and organic compounds. Solute concentrations of ammonium (NH) were built up over time. In treatments with pollen from birch, oak and beech, nitrate (NO) concentrations started to decrease after 24–48 hours, while simultaneously nitrite (NO-) emerged, but part of the inorganic nitrogen could no longer be detected in solution. For birch, sterilisation of the pollen made no difference, indicating that microorganisms on the pollen played no substantial role in the observed N transformations. Conditions in the samples were oxic (1.82–6.12 mg O l), rendering microbial denitrification unlikely. Our findings revealed that pollen from broadleaved deciduous trees can transform throughfall NO into NO and likely also nitric oxide (NO), probably through the nitrate reductase pathway. The synthesis of NH might be part of a natural defence mechanism protecting reproductive organs against pathogens during pollination.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In vitro nitrogen transformations by pollen from temperate tree species

Verstraeten,

Gottardini,

Bruffaerts

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Role of Nutrients in the ROS Metabolism in Plants

Ashraf¹,

Rasheed²,

Shad³

et al. 2023

Plant Ionomics

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In Vitro Nitrogen Transformations by Pollen From Temperate Tree Species

Verstraeten

Gottardini

Bruffaerts

et al. 2021

Preprint

View full text Add to dashboard Cite

The effects of pollen on dissolved inorganic nitrogen (DIN) compounds in throughfall water are not completely understood. We conducted a 7-day leaching experiment with pollen from silver birch (including a sterilized control), European beech, sessile oak, Scots pine, Corsican black pine and Norway spruce using an immersion medium containing nitrate (11.295 mg N l-1). Within 2 hours, pollen released substantial amounts of potassium (K+), phosphate (PO3-) and organic compounds. Solute concentrations of ammonium (NH4+) were built up over time. In treatments with pollen from birch, oak and beech, nitrate (NO3-) concentrations started to decrease after 24–48 hours, while simultaneously nitrite (NO2-) emerged, but part of the inorganic nitrogen could no longer be detected in solution. For birch, sterilisation of the pollen made no difference, indicating that microorganisms on the pollen played no substantial role in the observed N transformations. Conditions in the samples were oxic (1.82–6.12 mg O2 l-1), rendering microbial denitrification unlikely. Our findings revealed that pollen from broadleaved deciduous trees can transform throughfall NO3- into NO2- and likely also nitric oxide (NO), probably through the nitrate reductase pathway. The synthesis of NH4+ might be part of a natural defence mechanism protecting reproductive organs against pathogens during pollination.

show abstract

Hydrogen Peroxide and Nitric Oxide Signaling Network

Cited by 3 publications

References 115 publications

In vitro nitrogen transformations by pollen from temperate tree species

In vitro nitrogen transformations by pollen from temperate tree species

Role of Nutrients in the ROS Metabolism in Plants

In Vitro Nitrogen Transformations by Pollen From Temperate Tree Species

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