This article Citation:

Shubha Chimmalagi, P. Jones Nirmalnath, Madhura A. Sagarkar, K.S. Jagadeesh and Ramesh Babu . 2018. Isolation, screening and selection of efficient native arbuscular mycorrhizal fungi for suppression of Striga in sugarcane . Indian Journal of Weed Science : 50( 1) 51- 55.







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Volume Issue Publication year Page No Type of article
50 1 2018 51-55 Research article
Isolation, screening and selection of efficient native arbuscular mycorrhizal fungi for suppression of Striga in sugarcane

Shubha Chimmalagi, P. Jones Nirmalnath, Madhura A. Sagarkar, K.S. Jagadeesh and Ramesh Babu

DOI: http://dx.doi.org/10.5958/0974-8164.2018.00011.4

Email: jones.nirmalnath@gmail.com
Address: AICRP on Weed Management, MARS, University of Agricultural Sciences, Dharwad, Karnataka 580 005

Keywords:

Native AMF consortium

Striga asiatica

Sugarcane

Weed control



Abstract:

The control of Striga is difficult to achieve because of its high fecundity and asynchronous seed germination. Thus, an attempt was made to control Striga in its subterranean stage of development using native arbuscular mycorrhizal fungi (AMF) spp.  In this investigation, 16 AMF spp. were isolated, grouped and mass multiplied according to their morphological differences from the Striga suppressive soil of sugarcane growing area. Further, these 16 native AMF isolates (coded as UASDAMF), native AMF consortium (including 16 native AMF spp.), standard AMF consortium and uninoculated control- UIC (without AMF spp.) were tested against Striga under pot experiment. Significant inhibition of Striga emergence was observed with standard AMF consortium, native AMF consortium, UASDAMF-2, UASDAMF-5, UASDAMF-9 and UASDAMF-12.  While, the UIC recorded highest number of Striga infestation.  Chlorophyll content in sugarcane leaves (43.36 and 42.72 at 90 and 120 DAP respectively) were recorded highest with native AMF consortium. The physiological parameters such as photosynthetic rate and stomatal conductivity of sugarcane also recorded highest (18.16 and 0.55 µmol/m2/sec respectively) with native AMF consortium. The results indicated that the native AMF can efficiently compensate the negative effect of Striga infestation on sugarcane plants. An overall improvement in the biochemical and physiological attributes of the Striga-susceptible sugarcane variety CO86032 upon AMF colonization, clearly suggests the biocontrol and growth promotional potential of AMF consortium.





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