Unknown

Dataset Information

0

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


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.

SUBMITTER: Lonhienne TG 

PROVIDER: S-EPMC4031471 | biostudies-other | 2014

REPOSITORIES: biostudies-other

Similar Datasets

| S-EPMC4085590 | biostudies-other
| S-EPMC6057726 | biostudies-literature
| S-EPMC8236847 | biostudies-literature
| S-EPMC4941476 | biostudies-literature
2022-06-24 | GSE199834 | GEO
| S-EPMC4747558 | biostudies-literature
| S-EPMC8839049 | biostudies-literature
| S-EPMC3542044 | biostudies-literature
| S-EPMC3718220 | biostudies-literature
| S-EPMC8255077 | biostudies-literature