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

Lonhienne, Thierry G. A.; Trusov, Yuri; Young, Anthony; Rentsch, Doris; Näsholm, Torgny; Schmidt, Susanne; Paungfoo-Lonhienne, Chanyarat (2014). Effects of externally supplied protein on root morphology and biomass allocation in Arabidopsis. Scientific Reports, 4(1), pp. 1-8. Nature Publishing Group 10.1038/srep05055

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Growth, morphogenesis and function of roots are influenced by the concentration and form of nutrients present in soils, including low molecular mass inorganicN(IN, ammonium, nitrate) and organicN(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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Molecular Plant Physiology

UniBE Contributor:

Rentsch, Doris

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

2045-2322

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

13 Aug 2014 08:43

Last Modified:

30 Apr 2017 01:57

Publisher DOI:

10.1038/srep05055

BORIS DOI:

10.7892/boris.53935

URI:

https://boris.unibe.ch/id/eprint/53935

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