Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Guard_cell> ?p ?o. }
Showing items 1 to 27 of
27
with 100 items per page.
- Guard_cell abstract "Guard cells are specialized cells located in the lower leaf epidermis of plants. Pairs of guard cells surround tiny stomatal airway pores (Figure 1). These tiny pores in the leaf surface are necessary for gas exchange into and out of the plant; carbon dioxide (CO2) enters the plant allowing the carbon fixation reactions of photosynthesis to occur. Oxygen (O2) exits the plant as a byproduct of photosynthesis. The opening and closing of the stomatal gas exchange holes is regulated by swelling and shrinking of the two surrounding guard cells (Figure 1). Water evaporates through the stomatal openings causing plants to lose water. Over 95% of water loss from plants can occur by evaporation (transpiration) through the stomatal pores. Therefore, it is important for plants to be able to balance the amount of CO2 being brought into the plant with the amount of water escaping as a result of the open stomatal pores. Hence, the guard cells are the gate keepers of the plants ability to take in CO2 from the atmosphere for photosynthesis – while regulating how much water plants lose to the atmosphere. Opening and closure of the stomatal pore (Figure 1) is mediated by changes in the turgor pressure of the two guard cells. The turgor pressure of guard cells is controlled by movements of large quantities of ions and sugars into and out of the guard cells. When guard cells take up these solutes, the water potential (Ψ) inside the cells decreases, causing osmotic water flow into the guard cells. This leads to a turgor pressure increase causing swelling of the guard cells and the stomatal pores open (Figure 2). The ions that are taken up by guard cells are mainly potassium (K+) ions and chloride (Cl-) ions. In addition guard cells take up sugars that also contribute to opening of the stomatal pores.".
- Guard_cell thumbnail Guard_cells_signals.png?width=300.
- Guard_cell wikiPageID "5134478".
- Guard_cell wikiPageRevisionID "590899824".
- Guard_cell date "May 2013".
- Guard_cell hasPhotoCollection Guard_cell.
- Guard_cell reason "source?? and what is the route taken by the remaining 5%".
- Guard_cell subject Category:Plant_cells.
- Guard_cell type Cell100006484.
- Guard_cell type LivingThing100004258.
- Guard_cell type Object100002684.
- Guard_cell type PhysicalEntity100001930.
- Guard_cell type PlantCell111530149.
- Guard_cell type PlantCells.
- Guard_cell type Whole100003553.
- Guard_cell comment "Guard cells are specialized cells located in the lower leaf epidermis of plants. Pairs of guard cells surround tiny stomatal airway pores (Figure 1). These tiny pores in the leaf surface are necessary for gas exchange into and out of the plant; carbon dioxide (CO2) enters the plant allowing the carbon fixation reactions of photosynthesis to occur. Oxygen (O2) exits the plant as a byproduct of photosynthesis.".
- Guard_cell label "Guard cell".
- Guard_cell label "Schließzelle".
- Guard_cell label "保衛細胞".
- Guard_cell sameAs Schließzelle.
- Guard_cell sameAs m.0cc892l.
- Guard_cell sameAs Q241368.
- Guard_cell sameAs Q241368.
- Guard_cell sameAs Guard_cell.
- Guard_cell wasDerivedFrom Guard_cell?oldid=590899824.
- Guard_cell depiction Guard_cells_signals.png.
- Guard_cell isPrimaryTopicOf Guard_cell.