Faculty Member

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Research Interests

Stress interaction and combined stresses in plants

Due to changing climatic factors, plants are expected to combat the unique combination of stresses. Plants simultaneously exposed to a combination of stresses (for example, drought and pathogens) are expected to employ altogether a different &tailored response for combating them compared to those independently exposed to individual stresses. Such unique adaptive strategy used by plants is an exciting area of research.

Our lab uses Arabidopsis thaliana as model plant and attempts to capture the unique genes involved in disease resistance of these plants against Pseudomonas syringae pathovars (host & nonhost pathogens) under drought stress. Also, we study the interaction of moisture stress with fungal pathogen infection in chickpea and Ralstonia solanacearum infection in tomato plants. We employ virus-induced gene silencing (VIGS) tool to investigate the functional relevance of candidate genes.

Findings from this project will enable understanding not only the nature of stress interaction, but also the specific defense responses of combined stressed plants against pathogens.

Nonhost resistance of plants against pathogens

Plants are regularly exposed to wide variety of disease-causing pathogens in their environment. Plants have evolved various defense mechanisms, both active and passive to combat pathogen attack. R-gene mediated defense limits the host range of a pathogen to the member of a single species and is often overcome by the pathogen. In contrast, nonhost resistance is a response to all races of a particular pathogen and occurs in all cultivars of a nonhost plant species. We are particularly interested in understanding nonhost resistance of model plant A. thaliana against few bacterial pathogens that cause disease in crop plants (for example, tomato, and beans). Our lab also has a specific interest in identifying the nonhost plants of Begomoviruses and understanding the resistance mechanism operating in such nonhost plants against the viruses.