02324nas a2200253   4500008004100000022001400041245010900055210006900164260007100233300001400304490000700318520141500325653001501740653001601755653002001771653002501791653001501816100002301831700002401854700002101878700002101899700002001920856013001940       2011                        eng d  a1535-389300aAssimilatory potential of helicoverpa armigera reared on host (chickpea) and nonhost (cassia tora) diets0 aAssimilatory potential of helicoverpa armigera reared on host ch  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcNOV  a5128-51380 v103 a<p>Adaptation to plant allelochemicals is a crucial aspect of herbivore chemical ecology. To understand an insect ecology, we studied an effect of nonhost Cassia tora seed-based diet (Ct) on growth, development, and molecular responses in Helicoverpa armigera. We employed a comparative approach to investigate the proteomic differences in gut, hemolymph, and frass of H. armigera reared on a normal (chickpea seed-based, Cp) and Ct diet. In this study, a total of 46 proteins were identified by nano-LC-MS(E). Among them, 17 proteins were up-regulated and 29 proteins were down-regulated when larvae were exposed to the Ct diet. Database searches combined with GO analysis revealed that gut proteases engrossed in digestion, proteins crucial for immunity, adaptive responses to stress, and detoxification were down-regulated in the Ct fed larvae. Proteins identified in H. armigera hemolymph were found to be involved in defense mechanisms. Moreover, proteins found in frass of the Ct fed larvae were observed to participate in energy metabolism. Biochemical and quantitative real-time PCR analysis of selected candidate proteins showed differential gene expression patterns and corroborated with the proteomic data. Our results suggest that the Ct diet could alter expression of proteins related to digestion, absorption of nutrients, adaptation, defense mechanisms, and energy metabolism in H. armigera.</p>10aadaptation10aCassia tora10aGene expression10aHelicoverpa armigera10aproteomics1 aDawkar, Vishal, V.1 aChikate, Yojana, R.1 aGupta, Vidya, S.1 aSlade, Susan, E.1 aGiri, Ashok, P.  uhttps://library.ncl.res.in/content/assimilatory-potential-helicoverpa-armigera-reared-host-chickpea-and-nonhost-cassia-tora-002593nas a2200277   4500008004100000022001400041245009700055210006900152260007100221300001400292490000700306520162800313653001601941653001701957653001601974653001601990653001502006653002602021100002302047700002402070700002802094700002602122700002102148700002002169856012602189       2013                        eng d  a1535-389300aMolecular insights into resistance mechanisms of lepidopteran insect pests against toxicants0 aMolecular insights into resistance mechanisms of lepidopteran in  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcNOV  a4727-47370 v123 a<p>Insect pests remain a major reason for crop loss worldwide despite extensive use of chemical insecticides. More than B 50% of all insecticides are organophosphates, followed by synthetic pyrethroids, organochlorines, carbamates, and biopesticides, and their continued use may have many environmental, agricultural, medical, and socioeconomic issues. Importantly, only a countable number of insects have acquired the status of crop pests, mostly due to monoculture of crop plants and polyphagous nature of the insects. We focus on A adaptations of Lepidopteran insects to phytochemicals and synthetic pesticides in native and modern agricultural systems. Because of heavy use of chemical insecticides, a strong selection pressure is imposed on insect populations, resulting in the emergence of resistance against candidate compound(s). Current knowledge suggests that insects generally implement a three-tier system to overcome the effect of toxic compounds at physiological, biochemical, and genetic levels. Furthermore, we have discussed whether the adaptation to phytochemicals provides an advantage to the insect while encountering synthetic insecticide molecules. Specific metabolic pathways employed by insects to convert deterrents into less toxic forms or their removal from the system are highlighted. Using the proteomics approach, insect proteins interacting with insecticides can be identified, and their modification in resistant insects can be characterized. Also, systems biology studies can offer useful cues to decipher the molecular networks participating in the metabolism of detrimental compounds.</p>10afield crops10ainsect-pests10ainsecticide10aLepidoptera10aproteomics10aresistance mechanisms1 aDawkar, Vishal, V.1 aChikate, Yojana, R.1 aLomate, Purushottam, R.1 aDholakia, Bhushan, B.1 aGupta, Vidya, S.1 aGiri, Ashok, P.  uhttps://library.ncl.res.in/content/molecular-insights-resistance-mechanisms-lepidopteran-insect-pests-against-toxicants-002747nas a2200253   4500008004100000022001400041245014700055210006900202260006700271300001000338490000700348520180200355653001702157653002502174653002702199653001502226653001802241100002302259700002402282700002102306700002102327700002002348856012502368       2016                        eng d  a1672-960900aExpression of proteins involved in digestion and detoxification are regulated in helicoverpa armigera to cope up with chlorpyrifos insecticide0 aExpression of proteins involved in digestion and detoxification   a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcFEB  a68-770 v233 a<p>Helicoverpa armigera is a key pest in many vital crops, which is mainly controlled by chemical strategies. To manage this pest is becoming challenging due to its ability and evolution of resistance against insecticides. Further, its subsequent spread on nonhost plant is remarkable in recent times. Hence, decoding resistance mechanism against phytochemicals and synthetic insecticides is a major challenge. The present work describes that the digestion, defense and immunity related enzymes are associated with chlorpyrifos resistance in H. armigera. Proteomic analysis of H. armigera gut tissue upon feeding on chlorpyrifos containing diet (CH) and artificial diet (AD) using nano-liquid chromatography-mass spectrometry identified upregulated 23-proteins in CH fed larvae. Database searches combined with gene ontology analysis revealed that the identified gut proteins engrossed in digestion, proteins crucial for immunity, adaptive responses to stress, and detoxification. Biochemical and quantitative real-time polymerase chain reaction analysis of candidate proteins indicated that insects were struggling to get nutrients and energy in presence of CH, while at the same time endeavoring to metabolize chlorpyrifos. Moreover, we proposed a potential processing pathway of chlorpyrifos in H. armigera gut by examining the metabolites using gas chromatography-mass spectrometry. H. armigera exhibit a range of intriguing behavioral, morphological adaptations and resistance to insecticides by regulating expression of proteins involved in digestion and detoxification mechanisms to cope up with chlorpyrifos. In these contexts, as gut is a rich repository of biological information; profound analysis of gut tissues can give clues of detoxification and resistance mechanism in insects.</p>10achlorpyrifos10aHelicoverpa armigera10ainsecticide resistance10aproteomics10areal-time PCR1 aDawkar, Vishal, V.1 aChikate, Yojana, R.1 aMore, Tushar, H.1 aGupta, Vidya, S.1 aGiri, Ashok, P.  uhttps://library.ncl.res.in/content/expression-proteins-involved-digestion-and-detoxification-are-regulated-helicoverpa-0