Biochemical changes in rice yellow stem borer infested rice accessions Amsagowri V.1,*, Muthukrishnan N.2, Muthiah C.3, Mini M. L.4, Mohankumar S.5 1Department of Agricultural Entomology, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai, 625104 2Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, 641003 3Regional Research Station, Aruppukottai-626107, Tamil Nadu, Agricultural University 4Department of Biotechnology, Agricultural College and Research Institute, Madurai, 625104 5Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, 641003 *Corresponding author Email: vasuviji0590@gmail.com
Online published on 23 October, 2018. Abstract Biochemical constitution of 22 rice accessions showing susceptible, moderately susceptible, moderately resistant and resistant reaction to yellow stem borer, Scirpophaga incertulas (Walker) were studied in 40 days old transplanted healthy and stem borer infested plants under screen house condition. Total phenol increased by range of 13.11 to 43.66%, OD phenol increased by range of 20.00 to 61.29%, total sugar increased by range of 30.62 to 64.35%, reducing sugar increased by range of 33.68 to 64.48% and non-reducing sugar increased by range of 22.57 to 61.17% due to stem borer infestation in different rice accessions. The results depicted that the amount of total sugars, reducing sugar and non-reducing sugars in all susceptible genotypes was found higher compared to resistant and moderately resistant accessions. Higher level of total phenols and ortho-dihydroxy phenol were found in resistant and moderately resistant accessions as against susceptible accessions and indicating that these defensive compounds contributing towards the rice yellow stem borer resistance. Top Keywords Rice accessions, Scirpophaga incertulas, infestation, biochemical changes, resistance, phenol, total and reducing sugar. Top |