Brief introduction on mineral nutrition,water balance of plants and theories for ancient of SAP in plants
Mineral nutrition is a crucial aspect of plant growth and development, as plants require various essential minerals in order to carry out essential metabolic processes. These minerals are typically absorbed from the soil and are crucial for functions such as photosynthesis, enzyme activation, and structural support.
Water balance is also critical for plants, as water is essential for maintaining turgidity, nutrient transport, and carrying out metabolic processes. Plants must maintain a delicate balance of water uptake and loss in order to survive and thrive in various environmental conditions.
The ancient origin of the systemic acquired resistance (SAR) pathway in plants is a subject of ongoing research and debate. SAR is a defense mechanism in plants that is activated in response to pathogen infection and involves the induction of various defense-related genes. Some theories suggest that SAR may have evolved as a way for plants to rapidly respond to pathogen threats and adapt to changing environmental conditions. Further research is needed to fully understand the evolutionary origins and mechanisms of this important plant defense system.