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Plant growth-promoting bacteria and nitrate availability: impacts on root development and nitrate uptake
Sophie Mantelin1, Bruno Touraine
1Université Montpellier II, Laboratoire des Symbioses Tropicales et Méditerranéennes, UMR 113 UM2/IRD/CIRAD/INRA/ENSAM, CC 02, Place E Bataillon, 34095 Montpellier cedex 05, France.
Journal of Experimental Botany
|November 19, 2003
Summary
Plant growth-promoting bacteria (PGPB) and nitrate (NO3-) availability influence plant root development and nutrient uptake. This review compares their effects, exploring potential interactions in regulatory pathways.
Area of Science:
- Plant Biology
- Microbiology
- Nutrient Cycling
Background:
- Nitrate (NO3-) availability and plant growth-promoting bacteria (PGPB) impact NO3- uptake and root architecture.
- External NO3- induces transporter genes and lateral root elongation; high NO3- supply represses these processes.
Purpose of the Study:
- To compare the effects of NO3- availability and PGPB on root morphogenesis and NO3- uptake.
- To investigate potential interactions between NO3- and PGPB-dependent regulatory pathways.
Main Methods:
- Literature review comparing existing studies on NO3- and PGPB effects.
- Analysis of regulatory mechanisms for NO3- uptake and root development.
Main Results:
- PGPB effects on NO3- uptake and root development resemble low NO3- availability.
- PGPB stimulate NO3- uptake rate and lateral root development.
Conclusions:
- While NO3- regulation mechanisms are being elucidated, PGPB signaling pathways remain unknown.
- Further research is needed to determine if NO3- and PGPB pathways interact.