Root exudation of contrasting drought-stressed pearl millet genotypes conveys varying biological nitrification inhibition (BNI) activity.
GC–MS
LC–MS
Pearl millet
Primary metabolites
Root exudates
Secondary metabolites
Journal
Biology and fertility of soils
ISSN: 0178-2762
Titre abrégé: Biol Fertil Soils
Pays: Germany
ID NLM: 101159382
Informations de publication
Date de publication:
2022
2022
Historique:
received:
30
07
2020
revised:
10
06
2021
accepted:
12
06
2021
entrez:
11
4
2022
pubmed:
12
4
2022
medline:
12
4
2022
Statut:
ppublish
Résumé
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. The online version contains supplementary material available at 10.1007/s00374-021-01578-w.
Identifiants
pubmed: 35399158
doi: 10.1007/s00374-021-01578-w
pii: 1578
pmc: PMC8938368
doi:
Types de publication
Journal Article
Langues
eng
Pagination
291-306Informations de copyright
© The Author(s) 2021.
Déclaration de conflit d'intérêts
Conflict of interestThe authors declare no competing interests.
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