ArticlePlant physiology2025
Bacillus amyloliquefaciens promotes cluster root formation of white lupin under low phosphorus by mediating auxin levels.
Article in Plant physiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.
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Who cites it
9 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Trends in research on relationship between root exudates and soil phosphorus: a bibliometric analysis.Frontiers in plant science · 2025Pooled it
- Antagonistic Activity and Molecular Insights into the Biocontrol of Korla Pear Fire Blight byBiology · 2026Article
- Bacillus velezensis SQR9: a model biofertilizer strain for beneficial plant root-rhizobacterium interaction.Science China. Life sciences · 2026Review
- Differential Analysis of IAA Anabolism Pathway Based on Bacillus cereus, Bacillus subtilis and Bacillus safensis Genome.Environmental microbiology reports · 2026Article
- Review
- Multifunctional Bioactivity ofCurrent issues in molecular biology · 2026Article
- Beach grass to Brassicas: A novel salt-tolerant endophyte finds new roots.Plant physiology · 2026Article
- Evaluation of Phosphorus Efficiency in Cultivated and Wild Potato Genotypes.Plants (Basel, Switzerland) · 2025Article
- A bacterial-plant auxin alliance enhances phosphorus acquisition.Plant physiology · 2025Article
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Authors and funding
16 authors.
Funding
Abstract
White lupin (Lupinus albus L.) produces cluster roots to acquire more phosphorus under phosphorus deficiency. Bacillus amyloliquefaciens SQR9 contributes to plant growth, but whether and how it promotes cluster root formation in white lupin remain unclear. Here, we investigated the roles of SQR9 in cluster root formation under low phosphorus conditions using a microbial mutant and virus-induced gene silencing (VIGS) in white lupin. SQR9 substantially enhanced cluster root formation under low phosphorus conditions. The ysnE gene encodes an auxin biosynthesis enzyme in SQR9 and was associated with cluster root formation, as ysnE-defective SQR9 did not trigger cluster root formation. SQR9 inoculation induced the expression of PIN-formed2 (LaPIN2, encoding an auxin transporter) and YUCCA4 (LaYUC4, encoding an auxin biosynthesis enzyme) in white lupin roots. VIGS-mediated knockdown of LaPIN2 and LaYUC4 prevented wild-type SQR9-induced cluster root formation in white lupin. Finally, white lupin LaYUC4-derived auxin and SQR9-derived auxin pools were both transported by LaPIN2, promoting cluster root formation under low phosphorus conditions. Taken together, we propose that B. amyloliquefaciens promotes cluster root formation in white lupin under low phosphorus conditions by stimulating auxin biosynthesis and transport. Our results provide insights into the interplay between bacteria and root auxin in crop phosphorus use efficiency.
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