Transport in multi-cellular plants

May 19th, 2015
Studypool Tutor
Price: $10 USD

Tutor description

Water from the soil enters a plant through its root hairs and then moves across the roots into the xylem vessels, the water moves up through the root to the stem and from there into the leaves. Water moves down a water potential gradient from the soil to the air.

Word Count: 6968
Showing Page: 1/13
Week 21Transport in multi-cellular plantsWater from the soil enters a plant through its root hairs and then moves across the roots into the xylem vessels, the water moves up through the root to the stem and from there into the leaves. Water moves down a water potential gradient from the soil to the air.From soil to root hairThe tip of a roots hair is covered by a tough protective root cap that is not permeable to water. However, just behind the tip of some of the cells in the outer layer, or the epidermis are the roots hairs. These reach into spaces between the soils particles from where they will absorb water. Water moves into the root down a water potential gradient. Although soil water contains some inorganic ions in solution, it is a relatively dilute solution and so has a relatively higher water potential. However, the cytoplasm and the cell sap inside the root have considerable quantities of inorganic ions and organic substances, such as proteins and sugars, dissolved in them, and so have a relatively low water potential. Water, therefore, defuses down this water potential gradient, to the partially permeable plasma membrane, into the cytoplasm and the vacuole of the roots cells. The large numbers of very fine root hairs provide a large surface area in contact with soil water, thus increasing the rate at which water can be sucked up. However, these are relatively delicate and often only function for few days before being replaced by new ones as the root gro

Review from student

Studypool Student
" Thanks for the help. "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1825 tutors are online

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors