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Plant Probiotic Bacterial Endophyte, Alcaligenes faecalis, Modulates Plant Growth and Forskolin Biosynthesis in Coleus forskohlii. | LitMetric

Plant Probiotic Bacterial Endophyte, Alcaligenes faecalis, Modulates Plant Growth and Forskolin Biosynthesis in Coleus forskohlii.

Probiotics Antimicrob Proteins

Microbial Technology Laboratory, CSIR-Central Institute of Medicinal and Aromatic Plants, Research Center, Bangalore, 560065, India.

Published: June 2020

Coleus forskohlii is an herb, well-known for its medicinal compound forskolin present in its roots, with wide range of pharmaceutical applications. Here, we report, for the first time, the role of plant-probiotic bacterial endophytes of C. forskohlii, CFLB1 and CFRB1, isolated from leaf and root, which regulate plant growth and in plant forskolin content. Native bacterial endophyte, CFRB1 (Alcaligenes faecalis), significantly modulates primary plant productivity and forskolin content under pot and field conditions. Under field conditions, CFRB1 endophyte application significantly enhanced photosynthetic pigments and reduced the severity of root-knot and root rot diseases. Expression analyses of functional genes involved in the forskolin biosynthesis in C. forskohlii plants treated with CFRB1 endophyte under field conditions revealed differential upregulation of four C. forskohlii diterpene synthases (CfTPSs), CfTPS1, CfTPS2, CfTPS3 and CfTPS4, along with cytochrome P450 (CfCYP76AH15) and acyltransferase (CfACT1-8) genes. CFRB1 treatment reduced the severity of nematode infection and root rot in C. forskohlii plants by 81 and 78%, respectively. Overall, we demonstrate that cross-talk of plant-endophyte interaction in C. forskohlii is beneficial, leading to enhanced forskolin content through modulation of forskolin biosynthetic pathway genes along with increased plant yield and reduced disease incidence. Thus, endophytic isolate, A. faecalis (CFRB1), could be deployed as a novel bio-stimulant for enhancing in planta forskolin content during cultivation of C. forskohlii.

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Source
http://dx.doi.org/10.1007/s12602-019-09582-1DOI Listing

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