BIOCHEMICAL DEFENCE MECHANISM IN CAMELLIA SINENSIS AGAINST HELOPELTIS THEIVORA
|Shaheen Shah1*, RNS Yadav1 and PK Borua2
|Corresponding Author: Shaheen Shah, E-mail: [email protected]|
|Received: 10 May 2014 Accepted: 03 June 2014|
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The state of Assam located in the north-eastern part of India is the world’s largest tea growing region. Helopeltis theivora is a major pest of tea which causes damage to two and a bud of the plant from which the actual tea beverage is prepared. Hence an attempt is made to understand its biochemical changes and hence its defence mechanism. The biochemical parameters such as protein, carbohydrate, phenol, flavonoid, photosynthetic pigment (total chlorophyll, chlorophyll-a, chlorophyll-b), antioxidant enzymes viz; polyphenol-oxidase and peroxidase of non- infected and infected tea leaves were analysed.The infected and non-infected two and a bud of tea clones- TV1, TV23 (most susceptible), S3A3, Tinali (moderately susceptible) collected from 5 leading tea gardens located in Dibrugarh district, Assam, India was selected for the study. The results revealed that all varieties have varying levels of infectivity. With infection total protein, carbohydrate, phenol, chlorophyll, flavonoid decreases while oxidative enzymes viz; peroxidase, polyphenol-oxidase increases. The results showed that biochemical changes in host might be the outcome of oxidative stress and biochemical defence mechanism of helopeltis infested tea leaves.