Biomechanical and morphological changes in leaf abscission zones during the ontogeny of Kalanchoe pinnatum.
Leaves are commonly recognized as the main photosynthetic organ of the plant. Chloroplasts within leaves capture the energy from sunlight and use it to transform this energy into food for the plant. Leaves also aid plants in gas exchange and transpiration which allows water to be drawn upwards through the plant as it evaporates from a leaf's, surface (Campbell and Reece, 2005). In many plants, however, leaves have also evolved other functions that allow plants to live in water, provide protection, or even allow them to asexually reproduce (Table 1).