In vitro Antimicrobial Assay of Actinomycetes in Rice AgainstXanthomonas oryzae pv. oryzicola and as Potential Plant Growth Promoter

Abstract

The aim of this work was to in vitro assay the antimicrobial activity of actinomycetes in rice against

Isolation and Characterization of Amycolatopsis sp. strain CRJ2-11 with Biocontrol and Plant Growth Promoting Potential from Upland Rice Rhizosphere in Manipur, India

“…This is comparable to that of Pseudomonas fluorescens CHAO, an IAA hyperproducing strain (195 mg/L) [31]. The strain produced much higher levels of IAA than those reported for bacterial strains reported by various authors such as Hata, et al [7], Khamna, et al [32], Shrivastava, et al [33], Harikrishna, et al [34] and Jog, et al [35]. However, the optimal conditions for IAA production differ among various bacterial strains.…”

“…However, the optimal conditions for IAA production differ among various bacterial strains. For example, Jog, et al [6], Hata, et al [7], and Ghosh, et al [36] found maximal IAA production in media supplemented with 0.2% trp whereas Jog, et al [35] reported maximal IAA production at 0.5% trp concentration. In contrast, CRJ2-11 produced maximal IAA at 0.8% trp concentration.…”

“…They can also promote plant growth through P (Phosphate) solubilization, and production of phytohormones such as IAA and siderophores [6]. They also elaborate a plethora of secondary metabolites and antibiotics with antifungal and other bioactivities and form an abundant component (10-50%) of the soil microbial community and produce heat resistant spores [7]. Another attractive feature of actinomycetes is that they can survive in extreme environments and withstand various abiotic and biotic stresses.…”

Induction of Systemic Resistance against Bacterial Leaf Streak Disease and Growth Promotion in Rice Plant by Streptomyces shenzhenesis TKSC3 and Streptomyces sp. SS8

“…Two Streptomyces strains, S. shenzhenensis TKSC3 (TKSC3) and Streptomyces sp. SS8 (SS8) were selected based on a previous study ( Hata et al, 2015 ). TKSC3 and SS8 16S rDNA sequences have been deposited in the GenBank database with accession numbers KP792984 and KP792988, respectively.…”

Bioprocessing strategies for cost-effective large-scale biogenic synthesis of nano-MgO from endophytic Streptomyces coelicolor strain E72 as an anti-multidrug-resistant pathogens agent

“…Also, the total carbohydrate contents of both cell fractionations were determined by using the total carbohydrate colorimetric assay kit (Milpitas, CA 95035 USA). The nitrate reductase enzyme in both cell fractionations was checked and assayed according to 29 , 31 , 52 . Cell fractionations were mixed with 10 ml of assay medium (30 mM KNO 3 and 5% isopropanol in 0.1 M phosphate buffer of pH 7.5) and incubated at 30 °C for 1 hr in the dark condition.…”