Long distance transport, Biology

Long Distance Transport

Once in the xylem vessels, the transport of the mineral elements from the root to the shoot is driven by the gradient of hydrostatic pressure (root pressure) and by the gradient of water potential. The gradient of water potential between roots and shoots is usually quite steep during the day when the stomata are open. It follows the pattern: atmosphere << leaf cells << xylem sap < root cells < external solution (soil). Transport in xylem vessels is mainly unidirectional. An increase in the transpiration rate enhances both the uptake and the translocation of mineral elements in the xylem.

 

Posted Date: 1/17/2013 2:42:40 AM | Location : United States







Related Discussions:- Long distance transport, Assignment Help, Ask Question on Long distance transport, Get Answer, Expert's Help, Long distance transport Discussions

Write discussion on Long distance transport
Your posts are moderated
Related Questions
Technique of food processing Freezing is another ancient technique of food processing, which allows the transportation of perishable food items for long distances from producti

Adhesion of Cells to Extracellular Cell Matrix You know that the cells in order to move or change shape, adhere to each other or to the substratum in their environment. Usual

The heart is supplied exclusively by the right and left coronary arteries. The coronary arteries are functional end arteries. There is no effective anastamosis between right and le

Describe three ways that RNA differs from DNA. RNA is single stranded; DNA is double stranded all of the codons from the deletion point to the end of the transcript would be s

Explain the Absorption, Storage and Elimination of Folate? Folic acid is readily absorbed from the small intestines through the portal vein and  passed onto the tissues throug

Are there chloroplasts in cyanobacteria? In cyanobacteria there are no chloroplasts and the chlorophyll layers are dispersed in cytosol. Which chemical element is central in

Modified Starches In your opinion, what would be an ideal starch for all industrial uses including in food use? Well, one would think an ideal starch  for most of the foods sho

Gum Tragacanth  Gum tragacanth, the exudation of Astragalus species, is defined as the "dried gummy exudate" obtained from Astragalus gummifer Labillardiere. Gum tragacanth is

Linkage of Health With Development Health, in its comprehensive or holistic sense, refers to the state of completephysical, mental, social and spiritual well being of a person.

Explain Following Trems (a) State three structural features of prokaryotic cells. (b) Describe the functions in eukaryotic cells of lysosomes, ribosomes, and centrioles.