ArticleAnnals of botany2006
Influence of inorganic nitrogen and pH on the elongation of maize seminal roots.
Article in Annals of botany, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 50 citations in OpenAlex.
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- Effects of different nitrogen levels on growth and rhizosphere soil microorganisms ofFrontiers in plant science · 2026Article
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- Antioxidant enzyme responses and metabolite functioning of Pisum sativum L. to sewage sludge in arid and semi-arid environments.Environmental science and pollution research international · 2022Article
- Mineral Fertilization Influences the Growth, Cryptolepine Yield, and Bioefficacy ofPlants (Basel, Switzerland) · 2022Article
- Genotypic diversity and plasticity of root system architecture to nitrogen availability in oilseed rape.PloS one · 2021Article
- Dynamics of localised nitrogen supply and relevance for root growth of Vicia faba ('Fuego') and Hordeum vulgare ('Marthe') in soil.Scientific reports · 2020Article
- Influence of nitrogen and phosphorous on the growth and root morphology of Acer mono.PloS one · 2017Article
- NO signaling is a key component of the root growth response to nitrate in Zea mays L.Plant signaling & behavior · 2014Article
- Root system architecture: insights from Arabidopsis and cereal crops.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2012Article
- Deposition of ammonium and nitrate in the roots of maize seedlings supplied with different nitrogen salts.Journal of experimental botany · 2012Article
- Changes in external pH rapidly alter plant gene expression and modulate auxin and elicitor responses.Plant, cell & environment · 2010Article
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsRoot absorption and assimilation of inorganic nitrogen usually alters rhizosphere pH, but the immediate influence of such pH changes on root elongation as well as that of exogenous inorganic nitrogen itself has been uncertain.
methodsA differential extensiometer that monitored on a real-time, continuous basis root elongation in an intact 3-d-old maize plant was developed. Treatments included root media at pH 6.5 or 5.6 that lacked nitrogen and ones at pH 6.5 that contained 100 mmol m(-3) NH(4)(+) or NO(3)(-). KEY
resultsAcidifying the root medium from pH 6.5 to 5.6 nearly doubled the elasticity of the seminal root, but slightly decreased its elongation. Plasticity of the root apex was not detectable in all treatments. The presence of ammonium or nitrate in the medium stimulated elongation by 29 % or 14 %, respectively. Addition of an osmoticum to the medium had no effect on root elongation in the absence of inorganic nitrogen, but diminished the stimulation of elongation in the presence of ammonium and nitrate. This indicates that these ions or their by-products serve partially as osmolytes.
conclusionsIn nutrient solution, root elongation of a maize seedling--even one with ample nitrogen reserves--depended most strongly on exogenous inorganic nitrogen, and less so, if at all, on either the pH of the bulk nutrient solution or the mechanical properties of cell walls.
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