Effects of externally supplied protein on root morphology and biomass allocation in Arabidopsis

Article


Lonhienne, Thierry G. A., Trusov, Yuri, Young, Anthony, Rentsch, Doris, Nasholm, Torgny, Schmidt, Susanne and Paungfoo-Lonhienne, Chanyarat. 2014. "Effects of externally supplied protein on root morphology and biomass allocation in Arabidopsis." Scientific Reports. 4, pp. 1-8. https://doi.org/10.1038/srep05055
Article Title

Effects of externally supplied protein on root morphology and biomass allocation in Arabidopsis

ERA Journal ID201487
Article CategoryArticle
AuthorsLonhienne, Thierry G. A. (Author), Trusov, Yuri (Author), Young, Anthony (Author), Rentsch, Doris (Author), Nasholm, Torgny (Author), Schmidt, Susanne (Author) and Paungfoo-Lonhienne, Chanyarat (Author)
Journal TitleScientific Reports
Journal Citation4, pp. 1-8
Article Number5055
Number of Pages8
Year2014
Place of PublicationUnited Kingdom
ISSN2045-2322
Digital Object Identifier (DOI)https://doi.org/10.1038/srep05055
Web Address (URL)http://www.nature.com/articles/srep05055
Abstract

Growth, morphogenesis and function of roots are influenced by the concentration and form of nutrients present in soils, including low molecular mass inorganic N(IN, ammonium, nitrate) and organic N (ON, e.g.amino acids). Proteins, ON of high molecular mass, are prevalent in soils but their possible effects on roots have received little attention. Here, we investigated how externally supplied protein of a size typical of soluble soil proteins influences root development of axenically grown Arabidopsis. Addition of low to intermediate concentrations of protein (bovine serum albumen, BSA) to IN-replete growth medium increased root dry weight, root length and thickness, and root hair length. Supply of higher BSA concentrations inhibited root development. These effects were independent of total N concentrations in the growth medium. The possible involvement of phytohormones was investigated using Arabidopsis with defective auxin (tir1-1 and axr2-1) and ethylene (ein2-1) responses. That no phenotype was observed suggests a signalling pathway is operating independent of auxin and ethylene responses. This study expands the knowledge on N form-explicit responses to demonstrate that ON of high molecular mass elicits specific responses.

KeywordsArabidopsis; root morphology; biomass allocation; protein
ANZSRC Field of Research 2020300409. Crop and pasture protection (incl. pests, diseases and weeds)
Byline AffiliationsUniversity of Queensland
Department of Agriculture and Fisheries, Queensland
University of Bern, Switzerland
Swedish University of Agricultural Sciences, Sweden
Institution of OriginUniversity of Southern Queensland
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