Archive | Stress Physiology

The following points highlight the two methods employed by plants to cope with biotic stresses. The methods are: 1. Hypersensitive Response and 2. Secondary Acquired Resistance. Method # 1. Hypersensitive Response (HR): On being attacked by insects or a pathogenic microorganism, typically a plant responds with: (i) Formation of pathogenesis-related (PR) proteins, (ii) Biosynthesis of phytoalexins, (iii) Changes in composition [...]

The below mentioned article provides an useful note on secondary metabolites in plants. The organic compounds such as carbohydrates, proteins, fats, membrane lipids, nucleic acids, chlorophylls and hemes are found throughout the plant kingdom and are central to the metabolism of plants. These compounds are known as primary metabolites. Apart from these substances, many plants particularly those of certain genera [...]