Micrococcus luteus LS570 promotes root branching in Arabidopsis via decreasing apical dominance of the primary root and an enhanced auxin response

García‐Cárdenas, Elizabeth; Ortíz-Castro, Randy; Ruíz-Herrera, León Francisco; Valencia-Cantero, Eduardo; López‐Bucio, José

doi:10.1007/s00709-021-01724-z

Cited by 14 publications

(5 citation statements)

References 51 publications

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“…Chandarana et al (2022) reported that the protist‐PGPR interaction significantly modified root structure, leading to an enhanced outgrowth of lateral roots and seminal roots. García‐Cárdenas et al (2022) reported that Micrococcus luteus LS570 ( Actinobacteria ) induced the shift from long primary roots to short, more branched root systems via inducing a canonical auxin response. Besides bacteria, we also found that the relative abundance of Fusarium_oxysporum ( Ascomycota ) in the artificial rhizosheath was significantly higher than that in the bulk soil.…”

Section: Discussionmentioning

confidence: 99%

The pore‐rhizosheath shapes maize root architecture by enhancing root distribution in macropores

Liu,

Qin,

Richard Whalley

et al. 2024

Plant Cell & Environment

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Pores and old root‐channels are preferentially used by roots to allow them to penetrate hard soils. However, there are few studies that have accounted for the effects of pore‐rhizosheath on root growth. In this study, we developed an approach by adding the synthetic root exudates using a porous stainless tube with 0.1‐mm micropores through a peristaltic pump to reproduce the rhizosheath around the artificial pore, and investigated the effects of pores with and without rhizosheaths on maize root growth in a dense soil. The results indicated that the artificial rhizosheath was about 2.69 mm wide in the region surrounding the pores. The rhizosheath had a higher content of organic carbon, total nitrogen, and abundance of Actinobacteria than that of the bulk soil. Compared with the artificial macropores, the artificial root‐pores with a rhizosheath increased the opportunities for root utilisation of the pores space, promoting steeper and deeper root growth. It is concluded that the pore‐rhizosheath has a significant impact on root architecture by enhancing root distribution in macropores.

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Section: Discussionmentioning

confidence: 99%

The pore‐rhizosheath shapes maize root architecture by enhancing root distribution in macropores

Liu,

Qin,

Richard Whalley

et al. 2024

Plant Cell & Environment

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“…Dif ferent studies recognize their factibility for co-inoculation with beneficial bacteria in order to analyze the ef fects on plant development. Some recent results are reported by Ravelo-Ortega and López-Bucio (2022), García-Cárdenas, Ortiz, Ruiz, Valencia and López (2022) and Jiménez-Vázquez et al (2020) who have described dif ferent mechanisms of interaction between microorganism-plant.…”

Section: Introductionmentioning

confidence: 86%

“…). While in investigations carried out byGarcía-Cárdenas et. al., (2022) andZhou et al (2016) have shown the ef fect of co-cultivating isolates of the Bacillus and Staphylococcus genus in direct contact.…”

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confidence: 99%

Ef fect of rhizobacteria isolated from Suaeda sp. in the growth of Arabidopsis thaliana and Solanum lycopersicum L. (Sahariana)

Coria‐Arellano¹,

Sáenz‐Mata²,

Fortis-Hernández³

et al. 2023

Terra Latinoam

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The rhizosphere of the great diversity of plants is a complex ecosystem that houses thousands of rhizobacteria that promote plant growth. In the current investigation, three bacteria were isolated from the root of Suaeda sp., which were evaluated to determine the ef fect of their inoculation on Arabidopsis thaliana at distances of 2 and 5 cm and in divided boxes. In the 2 cm test, we noticed that Endo10(7) and Endo10(5) stimulated the plants more than the control, while the proximity to Ecto10(6) caused them to wilt and die. However, at 5 cm, the bacterium that most promoted the development of Arabidopsis was Ecto10(6). In the divided box test, all three bacteria showed the ability to promote growth. In addition, a shade mesh assay was carried out with the inoculation of the bacteria in Solanum lycopersicum L. (Sahariana) and it was found that the promoting ef fect was also observed in the germination and growth of tomato plants. Tests were conducted to determine its ability to produce IAA, siderophores, and solubilize phosphates. Through molecular techniques it was confirmed: the identity of Ecto10(6), Endo10(7), and Endo10(5) as Aneurinibacillus migulanus, Staphylococcus sp. and Bacillus cereus, respectively. Our results provide the rationale for suggesting that these rhizobacteria may increase the growth and development of Arabidopsis thaliana and Solanum lycopersicum.

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“…Auxin is the first plant hormone to be discovered, which influences numerous facets of plant development and growth, notably cell division, elongation, and distinctions. crucial essential [ 4 ], apical dominance [ 5 ], root architecture development [ 6 ], the induction of blooming [ 7 ], and fruit development [ 8 ]. During flower development, auxin can serve as an alternative signal replacing pollination and fertilization to trigger fruit-setting [ 9 ]; during the young fruit stage, auxin promotes the expansion of fruit by promoting the elongation and enlargement of cells [ 10 ]; and during fruit ripening stage, auxin has more different and complex effects among different species, which promotes or inhibits fruit ripening and softening.…”

Section: Introductionmentioning

confidence: 99%

Exogenous auxin regulates the growth and development of peach fruit at the expansion stage by mediating multiple-hormone signaling

Zhang,

Su,

Luo

et al. 2023

BMC Plant Biol

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Background Fruit expansion stage is crucial to fruit yield and quality formation, and auxin plays a significant role by mediating multi-hormone signals during fruit expansion. However, till now, it is still unclear of the molecular regulatory network during auxin-mediated peach fruit expansion. Results Here, exogenous NAA application markedly increased IAA content and drastically decreased ABA content at the fruit expansion stage. Correspondingly, NAA mainly induced the auxin biosynthesis gene (1 PpYUCCA) and early auxin-responsive genes (7PpIAA, 3 PpGH3, and 14 PpSAUR); while NAA down-regulated ABA biosynthesis genes (2 PpNCED, 1 PpABA3, and 1 PpAAO3). In addition, many DEGs involved in other plant hormone biosynthesis and signal transduction were significantly enriched after NAA treatment, including 7 JA, 7 CTK, 6 ETH, and 3 GA. Furthermore, we also found that NAA treatment down-regulated most of genes involved in the growth and development of peach fruit, including the cell wall metabolism-related genes (PpEG), sucrose metabolism-related genes (PpSPS), phenylalanine metabolism-related genes (PpPAL, Pp4CL, and PpHCT), and transcription factors (PpNAC, PpMADS-box, PpDof, PpSBP, and PpHB). Conclusion Overall, NAA treatment at the fruit expansion stage could inhibit some metabolism processes involved in the related genes in the growth and development of peach fruit by regulating multiple-hormone signaling networks. These results help reveal the short-term regulatory mechanism of auxin at the fruit expansion stage and provide new insights into the multi-hormone cascade regulatory network of fruit growth and development.

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Micrococcus luteus LS570 promotes root branching in Arabidopsis via decreasing apical dominance of the primary root and an enhanced auxin response

Cited by 14 publications

References 51 publications

The pore‐rhizosheath shapes maize root architecture by enhancing root distribution in macropores

The pore‐rhizosheath shapes maize root architecture by enhancing root distribution in macropores

Ef fect of rhizobacteria isolated from Suaeda sp. in the growth of Arabidopsis thaliana and Solanum lycopersicum L. (Sahariana)

Exogenous auxin regulates the growth and development of peach fruit at the expansion stage by mediating multiple-hormone signaling

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