Bio-chemical screening of the clones of Nothapodytes nimmoniana (an anti-cancerous drug yielding tree), for leaf spot disease resistance

Abstract

The clonal variation of reducing sugars and phenols in 44 different clones of Cylindrosporium leaf spot affected Nothapodytes nimmoniana (anti-cancerous drug yielding tree) have been investigated. Based on the per cent disease index the clones were classified into highly resistant (0%), resistant (1-15%), moderately resistant (21-35%), susceptible (36-50%) and highly susceptible (>50%). The results indicated the strong association between biochemical content and disease resistance. In moderately resistant clones (clone-Px and clone-O) reducing sugar content was 78.23 per cent and 72.33 per cent respectively. Whereas, reducing sugar content in check (healthy) plant was as high as 90 per cent. Similarly in phenol estimation moderately resistant reaction two clones viz. Px and O have shown highest per cent of phenol content, 51.80 and 53.73 per cent respectively. However, the phenol content in check (healthy) plant was recorded to be 71.40 per cent.