Figure 4 | Scientific Reports

Figure 4

From: Morphoanatomical and biochemical factors associated with rice resistance to the South American rice water weevil, Oryzophagus oryzae (Coleoptera: Curculionidae)

Figure 4

Activities (± SE) of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), peroxidase (POX), and polyphenol oxidase (PPO) in rice roots from susceptible (Ss) and resistant (Rr) cultivars with natural infestations of the South American rice water weevil Oryzophagus oryzae at 15, 25, and 35 days after flooding (DAF). Rice cultivars: PAMP = BRS Pampa CL (Ss) (light gray columns); DAWN = Dawn (Rr) (dark gray columns). Sampling times corresponded to beginning (15 DAF), peak (25 DAF), and decline (35 DAF) phases of larvae infestations in the field. Average numbers of larvae on plants collected for biochemical analysis at 15 DAF: PAMP = 4.94; DAWN = 4.15; 25 DAF: PAMP = 16.56, DAWN = 4.33; 35 DAF: PAMP = 20.81, DAWN = 5.08. Different lowercase letters above bars denote significant differences among rice cultivars at each sampling time, whereas different uppercase letters above bars denote significant differences in the same rice cultivar among sampling times, both by the Scott Knott test (P ≤ 0.05).

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