1. It is only theorized that they act as protective to the plant during certain stages of growth and are finally either destroyed or deposited as end products.
2. It has been theorized that tannins may provide energy to fruits by their oxidation process and fruits in their metabolism utilize this energy.
3. It has also been theorized that they have protective function in plant since they possess antiseptic properties so they prevent damage by insects and fungi.
4. They exert an inhibitory effect on many enzymes due to protein precipitation and they may serve as protective in barks and heartwood.
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Showing posts with label TANNINS. Show all posts
Showing posts with label TANNINS. Show all posts
Saturday, March 7, 2009
WHAT ARE TANNINS
TANNINS ARE POLYHYDROXY PHENOLS
INTRODUCTION: -
The term TANNIN was first applied in 1796 to denote the substances present in plant extracts, which were able to combine with proteins of animal, hides, prevent their putrefaction and convert them into leather.
DEFINITION: -
Tannins are complex substances that usually occur as mixtures of polyphenols that are very difficult to separate since they do not crystallize.
OCCURRENCE: -
Tannins are usually distributed through out the plant kingdom and localized in specific plant parts such as roots, leaves barks and stems. They are found in greatest quantity in dead or dying cells.
INTRODUCTION: -
The term TANNIN was first applied in 1796 to denote the substances present in plant extracts, which were able to combine with proteins of animal, hides, prevent their putrefaction and convert them into leather.
DEFINITION: -
Tannins are complex substances that usually occur as mixtures of polyphenols that are very difficult to separate since they do not crystallize.
OCCURRENCE: -
Tannins are usually distributed through out the plant kingdom and localized in specific plant parts such as roots, leaves barks and stems. They are found in greatest quantity in dead or dying cells.
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