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<p>of primary and secondary metabolites. These metabolites exit cells in the form of exudates through <a href="page.php?w=transport_protein">transporters</a> that vary depending on the chemical structure of the metabolites. The exudate secretion is then able to elicit a defense response against harmful microbes within the soil.</p>

<p><big> Rhizosphere </big></p>
<p>The <a href="page.php?w=rhizosphere">rhizosphere</a> is the thin area of soil immediately surrounding the root system. It is a densely populated area in which the roots compete with invading</p><p>
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