P. D. K. Jayanthi
Indian Institute of Horticultural Research
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Featured researches published by P. D. K. Jayanthi.
Arthropod-plant Interactions | 2017
Subhash Shivaramu; P. D. K. Jayanthi; Vivek Kempraj; Raghavendra Anjinappa; Bakthavatsalam Nandagopal; Akshay Kumar Chakravarty
Herbivore-induced plant volatiles (HIPVs) have been opined as ‘indirect or direct defenses’ of plants and are extensively studied. In contrast, HIPVs may also indicate that plant defenses have been overcome by herbivores infesting the plant; however, studies on this aspect have so far received little attention. Using the interaction of Capsicum annum (Bell pepper) with its pest Scirtothrips dorsalis (Chilli thrips) as a model system, we studied the role of HIPVs in this selected insect–plant interaction. Multiple-choice olfactometer assays with headspace volatiles collected from different growth stages of un-infested C. annum plants represented by pre-flowering (PF), flowering (FL) and fruiting stages (FR) proved FR volatiles to be highly attractive to S. dorsalis. Further, FR plants were infested with S. dorsalis adults and HIPVs released by infested plants were collected and subjected to multiple-choice olfactometer bioassays. Thrips were significantly attracted to HIPVs than to headspace volatiles of un-infested FR plants or thrips body odour. Coupled GC-EAG with S. dorsalis and HIPVs or FR plant volatile revealed specific compounds that elicited an EAG response. Individual EAG-active compounds were less attractive to thrips, however, synthetic blends of EAG-active compounds at the ratio similar to headspace samples were found to be highly attractive. However, when given a choice between synthetic blends of HIPVs and FR, thrips were significantly attracted to synthetic blend of HIPVs. Our study provides empirical data on signals HIPVs may provide to conspecific herbivores and suggests that the role of HIPVs, mostly generalized as defense, may vary based on the interaction and must be studied closely to understand their ecological functions.
Journal of Chemical Ecology | 2012
P. D. K. Jayanthi; Christine M. Woodcock; John C. Caulfield; Michael A. Birkett; Toby J. A. Bruce
Journal of Chemical Ecology | 2014
P. D. K. Jayanthi; Vivek Kempraj; Ravindra Mahadappa Aurade; Ravindra Kothapalli Venkataramanappa; Bakthavatsalam Nandagopal; Abraham Verghese; Toby J. A. Bruce
Proceedings of the 6th International Symposium on fruit flies of economic importance, Stellenbosch, South Africa, 6-10 May 2002 | 2004
Abraham Verghese; H. S. Madhura; P. D. K. Jayanthi; John Stonehouse; B. N. Barnes
Current Science | 2010
P. D. K. Jayanthi; P. Sangeetha; Abraham Verghese
Karnataka Journal of Agricultural Sciences | 2009
P. D. K. Jayanthi; P. Sangeetha; Abraham Verghese
Current Biotica | 2013
Subhash B. Kandakoor; Rashmi Ma; A. K. Chakravarthy; Abraham Verghese; P. D. K. Jayanthi; A. Verghese
Karnataka Journal of Agricultural Sciences | 2010
P. D. K. Jayanthi; Abraham Verghese
Entomon | 2010
P. D. K. Jayanthi; Abraham Verghese; D. K. Nagaraju
Archive | 2008
P. D. K. Jayanthi; Abraham Verghese; S. C. Goel