ABSTRACT
Plants respond to pathogenic diseases and some abiotic stress situations by producing a variety of secondary metabolites referred to as phytoalexins. They frequently possess powerful antibacterial and therapeutic properties. Phytoalexins accumulate at the sites of infection in concentrations that are inhibitory to the development of fungi and bacteria. Phytoalexin accumulation is regulated by levels of the relevant biosynthetic enzymes. Crop rotation has a long history of reducing disease damage. When one crop minimizes disease damage in the next crop, it likely excretes certain antimicrobial compounds. Crop rotation has a long history of reducing disease damage. Phytoalexins enhance plant defence for sustainable crop production. This chapter covers various phytoalexins synthesized by crop plant and their contribution in sustaining agriculture.
