Process
During hot, dry periods, the surface soil dries out so much that the lateral roots tend to exude whatever water they contain; thus the roots die unless the water is replaced. In plants that exhibit hydraulic redistribution, there are xylem pathways from the taproots to the laterals, so the loss of water from the laterals creates a pressure potential analogous to that of transpirational pull. Ground water is thus drawn up through the taproot to the laterals, only to be exuded into the surface soil.
Though often referred to as hydraulic lift, movement of water by the plant roots has been shown to occur in any direction. This phenomenon has been documented in over sixty plant species spanning a variety of plant types and over a range of environmental conditions.
Read more about this topic: Hydraulic Redistribution
Famous quotes containing the word process:
“Experiences in order to be educative must lead out into an expanding world of subject matter, a subject matter of facts or information and of ideas. This condition is satisfied only as the educator views teaching and learning as a continuous process of reconstruction of experience.”
—John Dewey (1859–1952)
“There was only one catch and that was Catch-22, which specified that a concern for one’s own safety in the face of dangers that were real and immediate was the process of a rational mind.... Orr would be crazy to fly more missions and sane if he didn’t, but if he was sane he had to fly them. If he flew them he was crazy and didn’t have to; but if he didn’t want to he was sane and had to.”
—Joseph Heller (b. 1923)
“By Modernism I mean the positive rejection of the past and the blind belief in the process of change, in novelty for its own sake, in the idea that progress through time equates with cultural progress; in the cult of individuality, originality and self-expression.”
—Dan Cruickshank (b. 1949)