Categories of phloem transport, Biology

Categories of Phloem Transport

Essentially, the phloem transport can be subdivided into the following:

  1. The "loading" of the organic nutrients from the mesophyll cell into the phloem of the leaves,
  2. Its translocation over long distances to the tissues awaiting supply,
  3. The "unloading" of the nutrients from the phloem into the cells of the sink.

All these three processes are interlinked. The rate of transport is not constant but depends on the metabolic needs of the sinks on one hand and on the rate of photosynthesis in the leaves - the sources on the other. Phloem transport is a very complex phenomenon and we may indicate, at the beginning itself, that in spite of intensive research, it is not fully understood even today. As such this field offers a very challenging subject for future research in plant anatomy and physiology.

Posted Date: 1/17/2013 3:57:29 AM | Location : United States

Related Discussions:- Categories of phloem transport, Assignment Help, Ask Question on Categories of phloem transport, Get Answer, Expert's Help, Categories of phloem transport Discussions

Write discussion on Categories of phloem transport
Your posts are moderated
Related Questions
Q. What is aquatic biodiversity? Biodiversity found on Earth today is the result of 3.5 billion years of evolution. Until the emergence of humans, the Earth supported more biod

Define briefly about the Selenium? The element selenium was discovered in 1817 in association with the element sulphur. However, selenium as an essential nutrient remained unre

Development of Heart in Amphibians The heart and the surrounding pericardial cavity build up from lateral mesoderm. After gastrulation, the mesodermal mantles carry on to gro

What is population growth rate? Population growth rate (PGR) is the percent variation among the number of individuals in a population at two different times. Thus the populatio

Foot as Burrowing Organ The Scaphopoda that usually have burrowing habit, possess foot suitably modified for burrowing purpose. The conical and protrusible foot of Dentalium

Carbohydrates These form about 1%part of protoplasm, they are comparatively simpler compounds of carbon, hydrogen and oxygen in the ratio 1:2:1 The ratio hydrogen to oxygen is

Explain about the Physiological Accommodation Physiological Accommodation contractile power of the ciliary muscle required to change the focussing power of the eye by ID. Meas

The pH of a solution of 1 M HCl is: Select one: a. 0 b. 0.1 c. 1 d. 10 e. negative 1

Where does most of the water resorbed after glomerular filtration go? What are the other substances resorbed by the nephron tubules? Only 0.5 to 1% of the glomerular filtrate i

Q. What are the functions of the spleen? Why is a total splenectomy (surgical removal of the spleen) compatible with life? The spleen has many functions: it participates in the