1 / 15

Plants.

Plants. ROOT root tip root hairs. Roots . 1. Roots anchor plant in soil, absorb minerals & water, & store food fibrous roots (1) mat of thin roots that spread out tap roots (2) 1 large vertical root also produces many small lateral, or branch roots root hairs (3)

landon
Download Presentation

Plants.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Plants.

  2. ROOT • root tip • root hairs

  3. Roots 1 • Roots anchor plant in soil, absorb minerals & water, & store food • fibrous roots (1) • mat of thin roots that spread out • tap roots (2) • 1 large vertical root • also produces many small lateral, or branch roots • root hairs (3) • increase absorptive surface area 2 3

  4. ROOT • root tip • root hairs • STEM • nodes • internodes • buds • terminal or apical buds • axillary buds • flower buds & flowers

  5. ROOT • root tip • root hairs • STEM • nodes • internodes • buds • terminal or apical buds • axillary buds • flower buds & flowers • LEAVES • mesophyll tissue • veins (vascular bundles)

  6. Leaves • Function of leaves • photosynthesis • energy production • CHO production • gas exchange • transpiration simple vs. compound

  7. Nutritional needs • plants need… • sun as an energy source • inorganic compounds as raw materials • water (H2O) • CO2 • minerals

  8. Macronutrients • Plants require these nutrients in relatively large amounts • C, O, H, N, P, K, Ca, Mg, S

  9. Micronutrients • Plants require in very small amounts • Cl, Fe, Mn, Bo, Zi, Ni, Mb • primarily cofactors for enzyme function

  10. Transport in plants • H2O & minerals • transport in xylem • transpiration • evaporation, adhesion & cohesion • Sugars • transport in phloem • bulk flow • Calvin cycle in leaves loads sucrose into phloem • Gas exchange • photosynthesis • CO2 in; O2 out • stomates • respiration • O2 in; CO2 out • roots exchange gases within air spaces in soil

  11. Water & mineral absorption • Water absorption from soil • osmosis • aquaporins • Mineral absorption • active transport • proton pumps • active transport of H+ aquaporin root hair proton pumps H2O

  12. Mineral absorption • Proton pumps • active transport of H+ ions out of cell • chemiosmosis • H+ gradient • creates membranepotential • difference in charge • drives cation uptake • creates gradient • cotransport of othersolutes against theirgradient

  13. Water flow through root • Porous cell wall • water can flow through cell wall route & not enter cells • plant needs to force water into cells Casparian strip

  14. Transport of sugars in phloem • Loading of sucrose into phloem • proton pumps • cotransport of sucrose into cells down proton gradient

More Related