International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 6, Issue:3, March, 2017

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : /
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(3): 2326-2337

Response of Bioinoculant Consortia on Nutrient Uptake, Forskolin Content (Diterpene) and Tuber Yield of Coleus (Coleus forskohlii (Willd) Briq.)
A.S. Noor Nawaz1*, H.S. Imran Khan2 and K.R. Sreeramulu3
1Department of Agricultural Microbiology, UAS, Dharwad-580 005, Karnataka, India
2Department of Plant Pathology, UA&HS, Shimoga-577 204, Karnataka, India
3Department of Microbiology, UAS, GKVK, Bangalore-560 065, Karnataka, India
*Corresponding author

A field experiment was conducted to assess the combined effect of bioinoculants on nutrient uptake, forskolin content (diterpene) and tuber yield of Coleus forskohlii (cutivar; K-8). The microbial inoculants such as Azotobacter chroococcum, Bacillus subtilis, Pseudomonas fluorescens, Glomus fasciculatum (VAM) were used. Bioagents such as Trichoderma harzianum and Pseudomonas fluorescens were used. Bioinoculants were examined along with graded levels of recommended dose of N and P2O5 with 100% K2O fertilizers. Nutrient uptake showed significant difference among the treatments. Forskolin estimation in tuberous roots quantitated by High Profile Liquid Chromatographic method and compared with standard procured from Natural Remedies, Bangalore. Forskolin in tuberous roots and tuber yield was maximum at harvest in the treatment of 100% NPK with combined inoculation of A. chroococcum, B. subtilis, T. harzianum, P. fluorescens and G. fasciculatum followed by plants inoculated with same consortia plus 75 % NP plus 100% K. The lowest nutrient uptake and forskolin content and tuber yield were recorded in uninoculated control plants supplemented with 50 % NP plus 100% K. This clearly showed that economically advantageous yields can be obtained with 75 % NP with 100% K and a saving of 25 % N can be achieved by using the above microbial consortia. This could be attributed that due to the effective use of consortia of bioinoculants with graded level of inorganic fertilizers.

Keywords: Bioinoculants, Forskolin, Azotobacter, Bacillus, Trichoderma, Mycorrhiza

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How to cite this article:

Noor Nawaz, A.S., H.S. Imran Khan and Sreeramulu, K.R. 2017. Response of Bioinoculant Consortia on Nutrient Uptake, Forskolin Content (Diterpene) and Tuber Yield of Coleus (Coleus forskohlii (Willd) Briq.)Int.J.Curr.Microbiol.App.Sci. 6(3): 2326-2337. doi:
Copyright: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.