Antibiosis Components and Antioxidant Defense of Rice as Mechanism of Resistance to Brown Planthopper, Nilaparvata lugens (St(a)over-circlel)

作者：Singh I; Sarao P S^*; Sharma N

来源：Cereal Research Communications, 2017, 45(2): 284-295.

DOI：10.1556/0806.45.2017.011

• rice
• brown planthopper
• antibiosis
• biochemical
• antioxidant
• resistance

The role of antibiosis components and antioxidant defense of rice genotypes, namely CR3006-8-2, RP4918-221, KAUM182-1, T12, IHRT-ME-25, W1263, Ptb33 (resistant check) and TN1 (susceptible check) was studied by phenotyping them against brown planthopper (BPH). Three genotypes, namely KAUM182-1, RP4918-221 and CR3006-8-2 were resistant to BPH and significantly low damage score (1.97-3.00); honeydew excretion area (46.76-49.64 mm(2)); nymphal survival (60.60-66.40%) and growth index (2.98-3.86) was recorded on them. Higher constitutive and induced level of soluble phenolics, peroxidase and polyphenol oxidase was observed in resistant genotypes without and with BPH infestation. A negative relationship between honeydew excretion, nymphal emergence, growth index and nymphal survival was observed with these biochemical constituents. Likewise, a reverse trend was observed between nymphal development period and biochemical constituents. These genotypes have emerged as a new source of resistance to BPH which can be used in hybridization programme to breed durable BPH resistant rice varieties.

• 出版日期2017-6