Table 1.
Disease scoring scale of brown spot in rice.
Fig 1.
Bipolaris oryzae the causal organism of brown spot disease in rice.
The disease symptoms are shown in susceptible and resistant rice genotypes, typical lesions appeared as dark brown in color and typical yellow halo around the spot on susceptible rice leaves.
Table 2.
Phenotypic response of diverse rice lines against brown spot disease.
Fig 2.
Comparison of superoxide dismutase (SOD) (A), ascorbate peroxidase (APX) (B), peroxidase (POD) (C) and catalase (CAT) (D) in rice genotypes (mean value ± SE), p<0.05).
Fig 3.
Comparison of total phenolic content (TPC) (A), tannins (B), ascorbic acid (ASA) (C) and total flavonoid content (Rutin) (D) in rice genotypes (mean value ± SE), p<0.05).
Fig 4.
Comparison of esterase (A), protease activity (B), alpha amylase activity (C) and total oxidant status (TOS) (D) in rice genotypes (mean value ± SE), p<0.05).
Fig 5.
Comparison of MDA content (A), total soluble protein (TSP) (B), lycopene content (C) and chlorophyll ‘a’ (D) in rice genotypes (mean value ± SE), p<0.05).
Fig 6.
Comparison of chlorophyll b (A), total chlorophyll (B), total carotenoids (C) and photosynthesis rate (D) in rice genotypes (mean value ± SE), p<0.05.
Fig 7.
Pearson Correlation matrix showing Pearson’s correlation among physiological and biochemical traits in rice genotypes under fungal stress condition.
Red and blue circles represent the negative and positive correlation, respectively. The extent of correlation is directed by pie filled area, i.e., smaller to larger pie fill area represents low to high correlation. APX (ascorbate peroxidase), SOD (superoxide dismutase), POD (peroxidase), CAT (catalase), MDA (malondialdehyde), TOS (total oxidant status), AsA (ascorbic acid), TPC (total phenolic content), TF (total flavonoids), Lyco (lycopene content), chl a (chlorophyll a), chl b (chlorophyll b), total chl (total chlorophyll), total car (total carotenoids) and TSP (total soluble protein).
Table 3.
Correlation matrix for physiological and biochemical traits.
Fig 8.
A: Tree diagram based on physiological and biochemical traits for different rice genotypes under biotic stress condition. B: Scree plot representing cumulative variability and Eigenvalues for studied parameters.
Table 4.
Principal component analysis for physiological and biochemical traits in different rice genotypes.
Fig 9.
Bi-plot illustration of rice genotypes for the first two principal components.