ArticleApplications in plant sciences2013
Heuristic aspect of the lateral root initiation index: A case study of the role of nitric oxide in root branching.
Article in Applications in plant sciences, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 9 citations in OpenAlex.
- Fine-tuned nitric oxide and hormone interface in plant root development and regeneration.Journal of experimental botany · 2023Review
- Exogenous Nitric Oxide Delays Plant Regeneration from Protoplast and Protonema Development inPlants (Basel, Switzerland) · 2020Article
- Lateral Root Primordium Morphogenesis in Angiosperms.Frontiers in plant science · 2019Review
- Exogenous Nitric Oxide and Phosphorus Stress Affect the Mycorrhization, Plant Growth, and Associated Microbes ofFrontiers in microbiology · 2019Article
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Authors and funding
3 authors at 2 institutions in 1 country.
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Abstract
unlabelledPREMISE OF THE STUDY: Lateral root (LR) initiation (LRI) is a central process in root branching. Based on LR and/or LR primordium densities, it has been shown that nitric oxide (NO) promotes LRI. However, because NO inhibits primary root growth, we hypothesized that NO may have an opposite effect if the analysis is performed on a cellular basis. Using a previously proposed parameter, the LRI index (which measures how many LRI events take place along a root portion equivalent to the length of a single file of 100 cortical cells of average length), we addressed this hypothesis and illustrate here that the LRI index provides a researcher with a tool to uncover hidden but important information about root initiation. • METHODS AND
resultsArabidopsis thaliana roots were treated with an NO donor (sodium nitroprusside [SNP]) and/or an NO scavenger (2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide [cPTIO]). LRI was analyzed separately in the root portions formed before and during the treatment. In the latter, SNP caused root growth inhibition and an increase in the LR density accompanied by a decrease in LRI index, indicating overall inhibitory outcome of the NO donor on branching. The inhibitory effect of SNP was reversed by cPTIO, showing the NO-specific action of SNP on LRI. •
conclusionsAnalysis of the LRI index permits the discovery of otherwise unknown modes of action of a substance on the root system formation. NO has a dual action on root branching, slightly promoting it in the root portion formed before the treatment and strongly inhibiting it in the root portion formed during the treatment.
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