Their function is to enable photosynthesis to be carried ..
to the photosynthesising palisade cells.
do algae concentrate CO2 to increase the efficiency of photosynthetic carbon fixation?Molecular Expressions Cell Biology: Plant Cell…Plant cells do, however, have a number of other specialized structures, including water, which is needed for the photosynthetic process, to maintain cell structure and These filaments are primarily structural in function and are an important BBC Bitesize - GCSE Biology - Gas exchange in plants -…Learn how plants respire all the time, but photosynthesis only happens during the day with BBC Bitesize GCSE Biology.
So let's go back through the parts of the leaf now, from top to bottom. We've got the thin, waxy cuticle... then the epidermis cells. These basically make up the leaf's skin. Then come the chlorophyll-rich palisade mesophyll, where the bulk of photosynthesis occurs. Below that is the spongy mesophyll, which have plenty space between them for reactants to move through. Through that space stretches the vascular bundle, with xylem to transport water and phloem to transport sugars. And below that, we've got another layer of epidermis and cuticle. Space around the lower epidermis and cuticle are the stomata, with guard cells on either side.
shaped like the cells in the palisade ..
What else do we need for photosynthesis? Carbon dioxide. That's where the bottom of the leaf comes in. It's got these little pores called stomata, which open up so carbon dioxide can diffuse in to the leaf. They're controlled by sausage shaped guard cells, which open up to let carbon dioxide in. But they can also close up the stomata and prevent other things like water from escaping. So the carbon dioxide comes in through the stomata, makes it's way through gaps in the airy layer of cells (called spongy mesophyll) at the bottom part of the leaf, heads up to the palisade layer for photosynthesis. Leaves are thin, so the carbon dioxide doesn't have very far to travel.
Cells of the mesophyll make up the bulk of internal leaf tissue and are the major site of photosynthesis in a plant by virtue of containing large populations of chloroplast organelles. The differentiation of the mesophyll and its coordinated expansion is important to leaf function because light interception by chloroplasts and gas exchange in the internal airspaces of the leaf are crucial to optimise rates of photosynthesis. In dicotyledonous leaves there are two types of mesophyll cell; palisade mesophyll and spongy mesophyll. Palisade mesophyll cells are elongate and form a layer beneath the upper epidermis, whereas spongy mesophyll cells are internal to the lower epidermis. Mesophyll cells in monocotyledonous leaves are often highly lobed. All mesophyll cells contain large populations of chloroplasts, which enable the leaf to carry out photosynthetic carbon assimilation.
BBC - GCSE Bitesize: Leaves and photosynthesis
Stomata, as mentioned above, are the structures through which gas exchange occurs plant structure bi - Biology JunctionSeed plants contain 2 types of vascular tissue (xylem & phloem) to help transport water, minerals, & food Apical Meristem occur at the tips of roots and shoots and are responsible for the length-wise extension of the Parenchyma cells can specialize for various functions (storage, photosynthesis, etc.) .
conducts photosynthesis in palisade cells, ..
Mesophyll - eLS: Essential for Life Science
borne above ground and specialized for photosynthesis
to photosynthesis the leaf is the principal ..
Molecular Biology & DNA
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