Abundant and diverse endophytic bacteria associated with medicinal plant Arctium lappa L. and their potential for host plant growth promoting

Liu, Jiaqi; Chen, Shumei; Zhang, Chunmei; Xu, Mingyu; Xing, Ke; Li, Chengguo; Li, Kui; Zhang, Yuqin; Qin, Sheng

doi:10.1007/s10482-022-01785-x

Cited by 9 publications

(4 citation statements)

References 79 publications

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“…Previous studies showed that the growth-promoting characteristics of the known strains are related to many mechanisms such as the presence of iron carriers, IAA production, and nitrogen fixation [12,79]. This study also confirmed through various experiments that the isolated strain Q11 T has the ability to promote plant growth.…”

Section: Discussionsupporting

confidence: 78%

“…Compared with the reported strains of the genus Flexivirga [1][2][3][4][5][6], strain Q11 T has the abilities of nitrogen fixation (181.80 IU/L), IAA production (3.26 mg/L in 2 days), and plant growth promotion, this last function being described for the first time for the genus Flexivirga. Previous research showed that endophytes promote plant growth through nitrogen fixation, phosphorus dissolution, and growth hormone production [12,79]. Endophytic bacteria with growth-promoting effects were isolated from plants such as rice [45], maize [80], black pepper [81], Arctium lappa L. [79], and Camellia sinensis [82].…”

Section: Discussionmentioning

confidence: 99%

“…Previous research showed that endophytes promote plant growth through nitrogen fixation, phosphorus dissolution, and growth hormone production [12,79]. Endophytic bacteria with growth-promoting effects were isolated from plants such as rice [45], maize [80], black pepper [81], Arctium lappa L. [79], and Camellia sinensis [82]. Therefore, the isolated strain Q11 T has important application potential in plant growth and agriculture.…”

Section: Discussionmentioning

confidence: 99%

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Endophytic Bacterium Flexivirga meconopsidis sp. nov. with Plant Growth-Promoting Function, Isolated from the Seeds of Meconopsis integrifolia

Kan,

Zhang,

Wang

et al. 2023

Microorganisms

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Strain Q11T of an irregular coccoid Gram-positive bacterium, aerobic and non-motile, was isolated from Meconopsis integrifolia seeds. Strain Q11T grew optimally in 1% (w/v) NaCl, pH 7, at 30 °C. Strain Q11T is most closely related to Flexivirga, as evidenced by 16S rRNA gene analysis, and shares the highest similarity with Flexivirga aerilata ID2601ST (99.24%). Based on genome sequence analysis, the average nucleotide identity and digital DNA–DNA hybridization values of strains Q11T and D2601ST were 88.82% and 36.20%, respectively. Additionally, strain Q11T showed the abilities of nitrogen fixation and indole acetic acid production and was shown to promote maize growth under laboratory conditions. Its genome contains antibiotic resistance genes (the vanY gene in the vanB cluster and the vanW gene in the vanI cluster) and extreme environment tolerance genes (ectoine biosynthetic gene cluster). Shotgun proteomics also detected antibiotic resistance proteins (class A beta-lactamases, D-alanine ligase family proteins) and proteins that improve plant cold tolerance (multispecies cold shock proteins). Strain Q11T was determined to be a novel species of the genus Flexivirga, for which the name Flexivirga meconopsidis sp. nov. is proposed. The strain type is Q11T (GDMCC 1.3002T = JCM 36020 T).

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Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Endophytic Bacterium Flexivirga meconopsidis sp. nov. with Plant Growth-Promoting Function, Isolated from the Seeds of Meconopsis integrifolia

Kan,

Zhang,

Wang

et al. 2023

Microorganisms

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“…For example, Paenibacillus polymyxa SK1 isolated from Lilium lancifolium showed the characteristics of promoting plant growth, such as producing organic acids, ACC deaminase, IAA, siderophore, nitrogen fixation, and dissolved phosphate [ 12 ]. In recent years, a large number of endophytic bacteria and actinomycetes with growth-promoting characteristics have also been isolated from plants such as corn [ 56 ], burdock [ 57 ], black pepper [ 58 ], and the Camellia sinensis [ 59 ]. In the realm of endophytic microorganisms, research on the plant growth promotion capabilities of endophytic actinomycetes has been substantially less extensive in comparison to endophytic bacteria [ 60 ].…”

Section: Discussionmentioning

confidence: 99%

Diversity of Endophytic Microbes in Taxus yunnanensis and Their Potential for Plant Growth Promotion and Taxane Accumulation

Liu,

Li,

Chen

et al. 2023

Microorganisms

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Taxus spp. are ancient tree species that have survived from the Quaternary glacier period, and their metabolites, such as taxol, have been used as anticancer drugs globally. Plant–endophytic microbial interaction plays a crucial role in exerting a profound impact on host growth and secondary metabolite synthesis. In this study, high-throughput sequencing was employed to explore endophytic microbial diversity in the roots, stems, and leaves of the Taxus yunnanensis (T. yunnanensis). The analysis revealed some dominant genera of endophytic bacteria, such as Pseudomonas, Neorhizobium, Acidovorax, and Flavobacterium, with Cladosporium, Phyllosticta, Fusarium, and Codinaeopsis as prominent endophytic fungi genera. We isolated 108 endophytic bacteria and 27 endophytic fungi from roots, stems, and leaves. In vitro assays were utilized to screen for endophytic bacteria with growth-promoting capabilities, including IAA production, cellulase, siderophore production, protease and ACC deaminase activity, inorganic phosphate solubilization, and nitrogen fixation. Three promising strains, Kocuria sp. TRI2-1, Micromonospora sp. TSI4-1, and Sphingomonas sp. MG-2, were selected based on their superior growth-promotion characteristics. These strains exhibited preferable plant growth promotion when applied to Arabidopsis thaliana growth. Fermentation broths of these three strains were also found to significantly promote the accumulation of taxanes in T. yunnanensis stem cells, among which strain TSI4-1 demonstrated outstanding increase potentials, with an effective induction of taxol, baccatin III, and 10-DAB contents. After six days of treatment, the contents of these metabolites were 3.28 times, 2.23 times, and 2.17 times the initial amounts, reaching 8720, 331, and 371 ng/g of dry weight of stem cells, respectively. These findings present new insight into the industrialization of taxol production through Taxus stem cell fermentation, thereby promoting the conservation of wild Taxus resources by maximizing their potential economic benefits.

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Microbial endophytes: prospects in biological control of plant pathogens and plant growth stimulation for sustainable agriculture

Kumar,

Diksha,

Sindhu

et al. 2024

Plant Endophytes and Secondary Metabolites

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Abundant and diverse endophytic bacteria associated with medicinal plant Arctium lappa L. and their potential for host plant growth promoting

Cited by 9 publications

References 79 publications

Endophytic Bacterium Flexivirga meconopsidis sp. nov. with Plant Growth-Promoting Function, Isolated from the Seeds of Meconopsis integrifolia

Endophytic Bacterium Flexivirga meconopsidis sp. nov. with Plant Growth-Promoting Function, Isolated from the Seeds of Meconopsis integrifolia

Diversity of Endophytic Microbes in Taxus yunnanensis and Their Potential for Plant Growth Promotion and Taxane Accumulation

Microbial endophytes: prospects in biological control of plant pathogens and plant growth stimulation for sustainable agriculture

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