Leaves contain chloroplasts located inside the leaf
cells which have chlorophyll, a green pigment to capture light energy and use it to
carry out photosynthesis. Leaf cells contain vacuoles, storage compartments to store
water, or to store excess food that is produced. Sometimes, extra glucose can be
converted to starch and stored elsewhere in a plant. For example, if the leaves of a
plant produce extra glucose, some can be transported via phloem cells to be stored as
starch above or underground in the fleshy stem or roots. These phloem cells are vascular
tissue located in the veins, and along with xylem cells which conducts water from the
soil up, function as a transport system in plants. In a desert environment, to reduce
the loss of water by evaporation, plants have a fleshy stem to store water and the leaf
surface is reduced to that of a needle. This cuts down on surface area and minimizes
water loss. Also, there are less pores called stomates on these needles which reduces
water loss. Desert plants have a waxy cuticle to protect the plant from
dehydration.
Friday, June 12, 2015
relate the structure of an organism leaf to each of the following. adaptations for photosynthesis and food storage adapation for food...
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