phytoalexin metabolic process

Definition

Target type: biologicalprocess

The chemical reactions and pathways involving phytoalexins, any of a range of substances produced by plants as part of their defense response. [Wikipedia:Phytoalexin]

Phytoalexin metabolic process is a complex and dynamic response mounted by plants in response to pathogen attack or abiotic stresses. It involves the synthesis and accumulation of antimicrobial compounds known as phytoalexins. These compounds play a crucial role in defending plants against a wide range of pathogens, including fungi, bacteria, and viruses. The process is tightly regulated and involves a cascade of signaling events that lead to the activation of specific genes involved in phytoalexin biosynthesis. Upon pathogen recognition, the plant cell initiates a signaling pathway that involves the production of reactive oxygen species (ROS) and the activation of defense-related transcription factors. These transcription factors bind to specific DNA sequences in the promoters of genes involved in phytoalexin biosynthesis, leading to their increased expression. The biosynthesis of phytoalexins often involves the modification of existing metabolites or the de novo synthesis of new compounds. These compounds can be diverse in their chemical structure, ranging from simple phenolic compounds to complex alkaloids and terpenoids. The specific type of phytoalexin produced depends on the plant species, the attacking pathogen, and the environmental conditions. Once synthesized, phytoalexins are transported to the site of infection, where they act directly on the pathogen by inhibiting its growth, development, or penetration. Some phytoalexins can also activate plant defense responses, such as the strengthening of cell walls or the induction of programmed cell death. The phytoalexin metabolic process is an essential part of the plant's innate immune system, providing a rapid and effective defense against pathogen attack. The production of phytoalexins is a highly regulated process that involves complex signaling networks and metabolic pathways. Understanding the intricacies of this process is crucial for developing novel strategies for enhancing plant disease resistance and improving crop yields.'
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Proteins (1)

Compounds (3)