Journal article
Root exudation of contrasting drought-stressed pearl millet genotypes conveys varying biological nitrification inhibition (BNI) activity
Biology and Fertility of Soils, Vol.58, pp.291-306
2021
Abstract
Roots secrete a vast array of low molecular weight compounds into the soil broadly referred to as root exudates. It is a key mechanism by which plants and soil microbes interact in the rhizosphere. The effect of drought stress on the exudation process and composition is rarely studied, especially in cereal crops. This study focuses on comparative metabolic profiling of the exudates from sensitive and tolerant genotypes of pearl millet after a period of drought stress. We employed a combined platform of gas and liquid chromatography coupled to mass spectrometry to cover both primary and secondary metabolites. The results obtained demonstrate that both genotype and drought stress have a significant impact on the concentration and composition of root exudates. The complexity and function of these differential root exudates are discussed. To reveal the potential effect of root exudates on the soil microbial community after a period of drought stress, we also tested for biological nitrification inhibition (BNI) activity. The analysis revealed a genotype-dependent enhancement of BNI activity after a defined period of drought stress. In parallel, we observed a genotype-specific relation of elongated root growth and root exudation under drought stress. These data suggest that the drought stress-dependent change in root exudation can manipulate the microbial soil communities to adapt and survive under harsh conditions.
Details
- Title
- Root exudation of contrasting drought-stressed pearl millet genotypes conveys varying biological nitrification inhibition (BNI) activity
- Authors/Creators
- A. Ghatak (Author/Creator)F. Schindler (Author/Creator) - MoSysG. Bachmann (Author/Creator) - MoSysD. Engelmeier (Author/Creator) - MoSysP. Bajaj (Author/Creator) - International Crops Research Institute for the Semi-Arid TropicsM. Brenner (Author/Creator) - University of ViennaL. Fragner (Author/Creator) - University of ViennaR.K. Varshney (Author/Creator) - International Crops Research Institute for the Semi-Arid TropicsG.V. Subbarao (Author/Creator) - Japan International Research Center for Agricultural SciencesP. Chaturvedi (Author/Creator) - MoSysW. Weckwerth (Author/Creator) - University of Vienna
- Publication Details
- Biology and Fertility of Soils, Vol.58, pp.291-306
- Publisher
- Springer-Verlag
- Identifiers
- 991005543993807891
- Copyright
- © 2021 Springer Nature Switzerland AG. Part of Springer Nature.
- Murdoch Affiliation
- Centre for Crop and Food Innovation; State Agricultural Biotechnology Centre
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Metrics
292 File views/ downloads
71 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.397 Nitrogen Management
- Web Of Science research areas
- Soil Science
- ESI research areas
- Agricultural Sciences