Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Historia Plantarum (Theophrastus) wikipedia , lookup
Plant nursery wikipedia , lookup
Plant physiology wikipedia , lookup
Ornamental bulbous plant wikipedia , lookup
Tree shaping wikipedia , lookup
Plant morphology wikipedia , lookup
Sustainable landscaping wikipedia , lookup
Plants Roots and Stems Roots Roots: Types of roots: Tap Root Plant structure that absorbs water and nutrients, anchors the plant, and holds it upright Go deep for water and store nutrients (carrots, dandelions, oak trees) Fibrous Root No single root bigger than the others. Spread out just under the surface to get water quickly. (Grasses) Other Root Types Adventitious Roots Aerial roots (air roots) Roots that form from parent tissue other than root tissue (Shoots, plant cuttings) Roots that allow plants to climb and attach to rocks (orchids) Brace Roots Roots that help to support tall plants (buttresses, corn, some trees) Root Structure Root Hairs Vascular Cylinder Area that contains the xylem and phloem Apical Meristem Increase absorption by the root by increasing surface area Area where roots grow New cells are fragile Root cap Hard covering over end of root Secretes slippery substance to allow root to push through soil Continuously losing and adding cells 1st Step for Water and Nutrient Transfer Root Pressure One way movement of water into roots Caused by roots pumping in minerals Water follows the minerals and can’t get back out Stems Parts of the stem Node Internode Where the leaves are attached Region between nodes Bud Contains undifferentiated tissue that will become a leaf, flower, or branch Mono vs Di Monocot Stem Vascular bundle are spread throughout the stem Dicot Stem Vascular bundles form a ring Plant Growth Primary Growth Secondary Growth Growing wider Tree Rings Elongating Correspond to wet and dry seasons Ring a tree Tree Layers 2 layers of Bark Vascular cambium and Sapwood Cork: outer layer containing old phloem and filler cells that have lots of fat and are water proof Cork Cambium: produces cork Where xylem and phloem are Heart wood Contains old nonfunctioning xylem that helps support the tree The End