Lateral Root from Scion Rescued the Susceptibility to Bacterial Wilt in Grafted Tomato on Wilt Resistant Brinjal Root Stock

Author: Bablu Paul, Kasireddy Sivasankarreddy, Moumita Mallick, Nilima Karmakar and Hossain Ali Mondal*

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Abstract

Arka Meghali, tomato variety developed by IIHR, Bangalore was released for kharif season cultivation. The North Bengal specific local brinjal having proven performance in all seasons was used as stock for grafting with Arka Meghali to heighten bacterial wilt resistance. The grafting process was optimized and transplanted into the field. The field performance, it was revealed that grafted Arka Meghali showed 88.26±6.44% wilt symptom as compared to non-grafted tomato (100% wilt), Arka Meghali. In the sick plot, non-grafted brinjal showed 11.11±2.77% wilt symptom. Further research revealed that upper portion above grafted point in scion showed higher OD at 600nm as compared to below portion of the grafted Arka Meghali (i.e. brinjal root stock). The non-grafted brinjal showed negligible concentration of bacterial titer in both below and above ground portion. Very interestingly, it was revealed that lateral root from the scion in the grafted tomato showed high titer of bacteria which cont

Keywords

Arka Meghali; Solanum lycopersicum L.; Ralstoniasolanacearum; Grafting; Lateral root; Susceptibility.