Biochemical Basis of Resistance in Rice Land races to Brown Planthopper Nilaparvata lugens (Stal.J

摘要

Laboratory estimation of chemical constituents such as total phenols, total soluble protein, total soluble sugar, total reducing sugars, nitrogen, phosphorus, potassium were estimated in healthy and BPH infested leaf tissues of 22 land races, one resistant check (Ptb-33) and two susceptible check (TNI and Java). Total phenol content was highest in healthy tissues of resistant iand races and PTB-33 and as a result of BPH feeding, the phenol content was increased in all the entries at different degrees. Significant differences were observed in total soluble protein and total soluble sugars in healthy tissues of landraces. Both total soluble protein and total soluble sugar content was reduced in leaf tissues of BPH infested plants. Total nitrogen content was highest in susceptible landraces and susceptible checks TN 1 and Jaya. Nitrogen content was depleted in the BPH infested plants when compared to healthy tissues. Significantly higher amount of potassium was found in resistant and moderately resistant landraces when compared to TNI and Jaya. There was not much difference in phosphorus content among the resistant and susceptible land races and between healthy and BPH infested plants.