Figures & data
Figure 1. Elicitor activity of algino-oligosaccharides on germinating rice.
Note: Accumulation of different phytoalexins expressed as optical density at 245 nm (clear), 250 nm (light fill), 268 nm (downward diagonal) and 274 nm (fill), respectively. S1, S2, S3, S4, S5 and S6 designate algino-oligosaccharides with a degree of polymerization of 11.4, 9.2, 7.9, 6.5, 5.3 and 4.2, respectively. Control, undegraded alginate.
Figure 2. Kinetics of phenylalanine ammonia lyase (PAL, •), peroxidase (POD, ▴) and catalase (CAT, ■) activity in rice leaves elicited by algino-oligosaccharides.
Figure 3. Changes in (A) phenylalanine ammonia lyase (PAL) activity, (B) peroxidase (POD) activity and (C) catalase (CAT) activity in inoculated leaves (▴) and uninoculated leaves (•) of rice plants after spraying with algino-oligosaccharides. Positive control (△): inoculated leaves on the rice plant sprayed with distilled water. Negative control (○): uninoculated leaves on the rice plant sprayed with distilled water.
Table 1. Efficiency of algino-oligosaccharides against rice blast.