BIOA01H3 Lecture Notes - Lecture 12: Vallisneria, Herbivore, Plant Reproductive Morphology

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Bebhinn Treanor

Document Summary

Type of limitation which is most common to southern ontario. Water is never limiting, but the overabundance of freshwater may limit other things, such as carbon dioxide for photosynthesis (concentration is much lower than in the air);; same as oxygen. Light decreases as you go deeper in water. Nutrient level is also lower in water than nutrients associated with soil. Water current may be so strong in creeks and river that they have to adjust so that the plants do not get torn apart. All of the plants organ is associated with water (no contact with atmosphere) Greatest # of adaptations: spend whole life in water dissected, narrow leaves. Poorly developed xylem since water is not a limiting reasource (almost) no mechanical strengthening. Little oxygen and carbon dioxide in water can easily enter the plant & get quick access to photosynthetic parenchyma. Thin cuticle, no stomates since water is not limited.