The effect of rhizospheric bacteria on the physiological and biochemical characteristics of safflower (Carthamus tinctorius)

Shahraki, Atefeh; Mohammadi-Sichani, Maryam; Ranjbar, Monireh

doi:10.52547/nbr.9.3.213

The effect of rhizospheric bacteria on the physiological and biochemical characteristics of safflower (Carthamus tinctorius)

Authors

Atefeh Shahraki ¹

Maryam Mohammadi-Sichani ¹

Monireh Ranjbar ²

¹ Department of Microbiology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran

² Department of Biology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran

https://doi.org/10.52547/nbr.9.3.213

Abstract

Rhizospheric bacteria are among the beneficial soil microorganisms that improve plant growth. These bacteria increase plant growth through various mechanisms such as the production of various phytohormones and the ability to solubilize phosphate. The aim of this study was to investigate the effects of rhizosphere bacteria on the growth of Carthamus tinctorius to improve its physiological and biochemical indicators. Carthamus tinctorius seeds were inoculated with five isolates of rhizosphere bacteria and were then planted the seeds in pots. Subsequently, the physiological and biochemical parameters of the plants, including the rates of auxin production, phosphate dissolving, photosynthetic pigments and the contents of proline and malondialdehyde were measured. For this purpose, a factorial experiment were conducted using a completely randomized design with three replications. The ANOVA was performed and a comparison of the means was carried out using Duncan’s multiple range test. The results indicated that the largest stem fresh weight, root fresh and dry weights observed in the treatments of using Pseudomonas fluorescens (auxin concentration of 23.55 μg/mL) and Bacillus muralis (auxin concentration of 22.27 μg/mL). In addition, all bacterial species increased the safflower seed germination rate compared to the control group. The largest malondialdehyde content was recorded in the treatment with Bacillus albus, and MDA content decreased in the treatments that produced larger amounts of auxin. In general, the finding of this research suggested that bacterial inoculation was capable to significantly affect the growth of safflower and improve its qualitative and quantitative growth parameters.

Keywords

Bacillus albus

Bacillus muralis

Carthamus tinctorius

Pseudomonas fluorescens

Rhizospheric Bacteria

20.1001.1.24236330.1401.9.3.6.6

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