Understanding the Biochemical Basis of Resistance in Rice to Leaffolder (Cnaphalocrocis medinalis)
Anil Varma Nalla *
Anil Varma Nalla Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal-609603, U.T. of Puducherry, India.
S. Nadaradjan
Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal-609603, U.T. of Puducherry, India.
D. Adiroubane
Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal-609603, U.T. of Puducherry, India.
K. Kumar
Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal-609603, U.T. of Puducherry, India.
*Author to whom correspondence should be addressed.
Abstract
Rice leaf folder has been recorded to cause major loss in rice yield. To know the relevance of biochemical factors in conferring tolerance to rice leaffolder Cnaphalocrocis medinalis, a study was conducted utilizing 196 rice accessions at Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal. Standard evaluation system developed by IRRI for leaf folder complex was followed for screening the rice accessions and entries were ranked accordingly based on the leaf damage. Among these entries, top five entries along with the susceptible check (TN1) were selected for analysis of biochemical factors such as total chlorophyll, total sugars, reducing sugars, total phenols, total soluble protein and proline. Results revealed that high level of total phenols, moderate chlorophyll content, and low sugar content in leaves conferred resistance to this pest in rice.
Keywords: Total sugars, reducing sugars, phenol content, total soluble protein, proline