Brassinosteroid effects on some physical and biochemical properties and secondary metabolite accumulation in peppermint (Mentha piperita L.) under salt stress

Gluconacetobacter diazotrophicus is a diazotrophic endophyte that is a potential biofertilizer. Little is known about the mechanisms of G. diazotrophicus interaction with its host plants. We tested the effect of UV light, as an inducer of secondary metabolite accumulation, on the association between common bean ( Phaseolus vulgaris L.) seedling roots and G. diazotrophicus. UV light irradiation of seedlings 4 h prior to bacterial inoculation increased the number of bacterial cells associated with the roots by 5.65-fold with respect to a nonirradiated control (p < 0.05). Gluconacetobacter diazotrophicus associates with root hairs and root border cells. Aggregation of bacterial cells was observed in root structures from UV-induced seedlings. Secondary metabolite accumulation was also observed in roots from UV-irradiated seedlings.

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Over-expression ofDXSgene enhances terpenoidal secondary metabolite accumulation in rose-scented geranium andWithania somnifera: active involvement of plastid isoprenogenic pathway in their biosynthesis

Physiologia Plantarum ◽

10.1111/ppl.12507 ◽

2016 ◽

Vol 159 (4) ◽

pp. 381-400 ◽

Cited By ~ 31

Author(s):

Jyoti Singh Jadaun ◽

Neelam S. Sangwan ◽

Lokesh K. Narnoliya ◽

Neha Singh ◽

Shilpi Bansal ◽

...

Keyword(s):

Secondary Metabolite ◽

Over Expression ◽

Active Involvement ◽

Metabolite Accumulation

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Changes of global gene expression and secondary metabolite accumulation during light-dependent Aspergillus nidulans development

Fungal Genetics and Biology ◽

10.1016/j.fgb.2016.01.004 ◽

2016 ◽

Vol 87 ◽

pp. 30-53 ◽

Cited By ~ 27

Author(s):

Özgür Bayram ◽

Kirstin Feussner ◽

Marc Dumkow ◽

Cornelia Herrfurth ◽

Ivo Feussner ◽

...

Keyword(s):

Gene Expression ◽

Aspergillus Nidulans ◽

Secondary Metabolite ◽

Global Gene Expression ◽

Metabolite Accumulation

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563 Influence of Ultra-high Levels of Carbon Dioxide on Secondary Metabolite Production in Vitro

HortScience ◽

10.21273/hortsci.34.3.543c ◽

1999 ◽

Vol 34 (3) ◽

pp. 543C-543

Author(s):

Brent Tisserat ◽

Steven Vaughn

Keyword(s):

Secondary Metabolite ◽

Secondary Metabolite Production ◽

Mentha Piperita ◽

Thymus Vulgaris ◽

Ms Medium ◽

Fresh Weight ◽

Mentha Spicata ◽

Metabolite Production ◽

Wide Range

The influence of a wide range of CO2 levels on the growth, morphogenesis, and secondary metabolite production in vitro was evaluated. Shoots of thyme (Thymus vulgaris L.) and a spearmint–peppermint cross (Mentha spicata × Mentha piperita) were grown on MS medium with and without 3% sucrose under 350, 1500, 3000, 10,000, and 30,000 μL CO2/L for 8 weeks. Dichloromethane extracts from leafs were analyzed using GC-MS techniques. Prominent peaks were identified by comparison with known standards. Highest growth (i.e., fresh weight) and morphogenesis responses (i.e., leafs, shoots and roots) were obtained when shoots were grown under 10,000 μL CO2/L regardless of whether or not sucrose was included in the medium. Ultra-high CO2 concentrations (3000 μL CO2/L) stimulated secondary metabolite production regardless of whether or not the medium contained sucrose. However, the combination of certain ultra-high CO2 levels (e.g., 3000 to 10,000 μL CO2/L) and the presence of sucrose in the medium resulted in shoots producing the highest levels of secondary metabolites. These results suggest that in vitro photosynthesis, which is stimulated by ultrahigh CO2 levels, may enhance secondary metabolite production.

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