International Journal of Bioresource Science Citation: IBS: 7(1): 33-38, June 2020 DOI: 10.30954/2347-9655.01.2020.7 How to cite this article: Roy, D., Rakesh, S., Sahoo, S. and Ranjith Kumar, G. (2020). Magnitude and Mechanism of Siderophore as a Potential Tool in Eco Friendly Agriculture. International Journal of Bioresource Science, 7(1): 33-38. Source of Support: None; Conflict of Interest: None Magnitude and Mechanism of Siderophore as a Potential Tool in Eco Friendly Agriculture Dewali Roy 1 , Rakesh, S. 1 , Samaresh Sahoo 1 and Ranjith Kumar Gandu 2 1 Department of Soil Science and Agricultural Chemistry, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal, India 2 Department of Soil Science and Agricultural Chemistry, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Mahrashtra, India Corresponding author: rakisavan.940@gmail.com Received: 11-01-2020 Revised: 19-04-2020 Accepted: 26-05-2020 ABSTRACT Siderophores are low molecular weight metal chelating agents which are produced by plants and microorganisms in Fe- limiting conditions. These Siderophores chelate iron and supply to bacterial cell by outer membrane receptors. There is a wide variable seen in siderophore nature and functions from bacterial species to species. Isolation of siderophore agent can only be obtained under Fe restricted media. Siderophore and their derivative have large application in agriculture starting from soil fertility, bio control agent, plant growth promoter and also as a bio remediation against heavy metals. There is still a lot way further to research its mechanism and mode of function so that to explore its potentiality in felds other than agriculture also for plant and human benefts. Keywords: Siderophores, Fe chelates, Soil health, Eco-friendly agriculture One of the vital elements, Iron (Fe) is critical for all living organisms to carry out important cellular process viz, electron transport chain and simultaneously as a cofactor for many enzymes (Litwin and Calderwood, 1993) that facilitates various enzymatic process as a catalyst. Fe has also a significant role to play in oxygen metabolism DNA and RNA synthesis (Aguado- Santacruz et al. 2012). Soil microorganisms, specially under aerobic environment need Fe for a wide variety of functions that includes reduction of oxygen for the synthesis of ATP, formation of heme protein etc. Fe also helps in bio flm formation and controls surface motility and stabilize the polysaccharide matrix (Weinberg, 2004; Chhibber et al. 2013). Under aerobic condition free Fe gets oxidize to insoluble oxy hydroxide polymer and reduce the level of free Fe which generates gradually Fe limiting condition. Thus, microorganism adopts an alternate way for Fe acquisition by producing Fe chelating molecule i.e. siderophore. Siderophore are low molecular weight (< 10 KD) Fe chelating compounds synthesized by bacterial population such as Pseudomonas, Azotobacter, Bacillus, Enterobacter, Serratia, Azospirillum and Rhizobium (Glick et al. 1999; Loper et al. 1999). Siderophore combines with free Fe and forms complex which transport into the cell by the help of membrane receptor molecules, these receptor molecules that are encoded by fve genes in operon gets of when cells gets sufcient Fe (Lewin, 1984). With growing concern about soil health and organic agriculture practices, siderophores is geting major attention in the fields of application due to its immense potential in nutrition and plant health and ecofriendly nature. At present nearly 500