Explain: The direction of transport in plants.

(N/A) $\Rightarrow$ The direction of transport in plants is highly significant.
$\Rightarrow$ In rooted plants,the transport of water and minerals through the $Xylem$ is essentially unidirectional,moving from the roots to the stems.
$\Rightarrow$ Organic compounds synthesized in photosynthetic leaves are exported to all other parts of the plant,including storage organs. From these storage organs,they are later re-exported.
$\Rightarrow$ Mineral nutrients are absorbed by the roots and transported upwards into the stem,leaves,and growing regions.
$\Rightarrow$ When a plant part undergoes senescence,nutrients are often withdrawn from those regions and moved to the actively growing parts.
$\Rightarrow$ Hormones (plant growth regulators) and other chemical stimuli are also transported,typically in very small amounts.
$\Rightarrow$ This transport often occurs in a strictly polarized or unidirectional manner,moving from the site of synthesis to other target parts.
$\Rightarrow$ Consequently,in a flowering plant,there is a complex but highly orderly traffic of compounds moving in different directions,with each organ receiving specific substances and releasing others.