Biochemical Basis of Resistance in Different Rice Accessions to Yellow Stem Borer, Scirpophaga incertulas (Walker) Amsagowri V.1,*, Muthiah C.2, Muthukrishnan N.3, Chinniah C.4 1Department of Agricultural Entomology, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai-625 104, Tamil Nadu, India 2Regional Research Station, Tamil Nadu Agricultural University, Aruppukottai-626 107, Tamil Nadu, India 3Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India 4Department of Agricultural Entomology, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai-625 104, Tamil Nadu, India *email vasuviji0590@gmail.com
Online published on 15 December, 2016. Abstract The biochemical factors are chemicals that affect insect behaviour, physiology, morphology, growth and chemical changes occurs in the form of accumulation of the compounds having defensive properties and growth. Some biochemical factors are associated with repellence, deterrence toxicity or adverse effects on insects. In this view, the study was focused on biochemical estimation of chemical constituents such as total soluble protein and tannin in healthy and yellow stem borer (YSB) infested stem tissues of 22 rice accessions. Tannin content was highest in healthy tissues of resistant variety (TKM 6) and moderately rice resistant accessions viz., O. minuta, O. nivara, O. glaberrima, IR 20, IET 23710 and IET 23715 and as a result of YSB infestation, the tannin content was increased in all the entries at different degrees. A significant difference was also observed in total soluble protein in healthy tissues of different rice accessions in which, maximum protein content was observed in healthy stem tissues of susceptible accession viz., IET 23673, IET 23673 and TN 1. However, protein content was reduced in stem tissues of YSB infested plants when compared to healthy plants in all tested accessions. Top Keywords Biochemical analysis, Rice accessions, Yellow stem borer, Healthy plants, Infested plants. Top |