Assessment of Plant-Probiotic Performance of Novel Endophytic Bacillus sp. in Talc-Based Formulation
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Assessment of Plant-Probiotic Performance of Novel Endophytic Bacillus sp. in Talc-Based Formulation Jasim Basheer 1 & Aswani Ravi 1 & Jyothis Mathew 1 & Radhakrishnan Edayileveettil Krishnankutty 1 # Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract Endophytic bacteria are considered to have a plethora of plant growth promoting and anti-phytopathogenic traits to live within the plants. Hence, they have immense promises for plant probiotic development. In the current study, plant probiotic endophytic Bacillus sp. CaB5 which has been previously isolated from Capsicum annuum was investigated for its performance in talc-based formulation. For this, CaB5 was made into formulation with sterile talc, calcium carbonate, and carboxymethyl cellulose. The viability analysis of the formulation by standard plate count and fluorescence methods has confirmed the stable microbial count up to 45 days. Plant probiotic performance of the prepared formulation was analyzed on cowpea (Vigna unguiculata) and lady’s finger (Abelmoschus esculentus). The results showed the formulation treatment to have enhancement effect on seed germination as well as plant growth in both selected plants. The results highlight the potential of CaB5-based formulation for field application to enhance growth of economically important plants. Keywords Bacillus sp. . Talc . Biofertilizer . Formulation preparation . Fluorescence microscopy
Introduction Endophytic microorganisms have unique adaptations to live specifically within the chemical environment of host plant [1]. By accommodating these microorganisms, the hosts are benefited by the endophyte-mediated production of plant growth regulators, nutrient mobilization, and also resistance to diseases [2]. The functional roles of endophyte have been studied only in a few cases, though their presence has been reported from wide variety of plants. Due to their plant beneficial features, endophytic bacteria have tremendous potential to be exploited as plant probiotic; hence, they can contribute much Jasim Basheer and Aswani Ravi are equally contributed authors * Radhakrishnan Edayileveettil Krishnankutty [email protected] Jasim Basheer [email protected] Aswani Ravi [email protected] Jyothis Mathew [email protected] 1
School of Biosciences, Mahatma Gandhi University, PD Hills (PO), Kottayam, Kerala 686 560, India
to the emerging demand in sustainable organic farming by minimizing the chemical input in agriculture [3]. Therefore, endophytic bacteria with multi-potent plant probiotic and biocontrol properties have tremendous agricultural promises. Endophytic production of indole-3-acetic acid (IAA), ACC deaminase, phosphate solubilization, siderophore, and antimicrobial compounds play key role in growth and health of plants [4]. However expected specificity of plant-endophyte interaction generates much concern on its field performance towards diverse plants. This is because changes in the biochemical profile of host can have significant impact on viability, co
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