Embedded Files
Time-lapse root and shoot growth video of a sunflower seed.
Naturenow, Wikimedia Commons
Video showing germination and growth of basil plant from seeds.
Naturenow, Wikimedia Commons
Potamogeton leaf at 100X magnification. Potamogeton is an aquatic plant, commonly known as pondweed. Both the upper (adaxial) surface of the leaf epidermis and lower (abaxial) surface of the leaf epidermis are uniseriate (arranged in a single row of cells) and contain chloroplasts.
The veins we see in leaves contain vascular bundles which is like the circulatory system in plants. In this image, vascular bundles are centrally located with xylem (for conduction of water and nutrients in the direction of root to leaf) toward the adaxial surface and phloem (for conduction of water and nutrients in the opposite direction of leaf to root) toward the abaxial surface. Vascular tissues are better developed in the mid vein (seen in the centre). Around the vascular tissues is an outer bundle sheath of large parenchyma and deeper wrapping of heavy walled supportive sclerenchyma.
Berkshire Community College Bioscience Image Library, Wikimedia Commons
Nymphaea alba (white water lily) leaf cross section at 400X magnification. E1: Upper epidermis, E2: Lower epidermis, B: Vascular bundle (consisting of vessels for conduction of water, nutrients and sap), P: Palisade cells (longish cells where photosynthesis majorly takes place), I: Intercellular space (space between two cells), S: sclerenchyma (which provides mechanical support), M: spongy tissue (which forms air spaces that help in exchange of gases).
Robert Kohlmann, Wikimedia Commons
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