BIS 2B Lecture Notes - Lecture 4: Water Efficiency, Chlorophyll, Stoma

• School: UC-Davis
• Department: Biological Sciences
• Course: BIS 2B
• Professor: strauss,gerhart

Document Summary

Functional diversity is a result of adaptations of orgs to their environment. Trade-offs: the relationship between the benefits of a trait in one context vs. the cost of th context. Principle of allocation: all life functions cannot be max"ed at once. Nitrogen and phosphorus and other minerals: metabolic bulk such as enzymes and protein. Phototrophs use sun to create organic molecules through photosynthesis. Plants use specific wavelengths of sunlight for ps. Adaptation to harvest photonic energy through chlorophyll pigment. Other modified chlorophylls for special times, processes, and places. Light is concentrated at the thermal equator and coasts, low conc @ ocean, poles ha concentration as nutrients are rich here. Different adaptations to different types of plants for ps. C3 plants (rice/wheat) have different physiological areas for gas exchange, nutrient tr vascular tissue. Keep stomata open for co2 which is used by the relatively inefficient rubisco e. May lose water in this process so not great.