A positive feedback mechanism is that in which a stimulus induces an output which in turn functions to magnify the same response <em>(acting as a stimulus to itself). </em>
As in this case, Ethylene acts as a stimulus for fruit ripening (<u>response</u>). When it is released during fruit ripening, it stimulates nearby fruits to ripen (<u>response</u>), which in turn acts to stimulate further fruits to ripen (<u>response</u>), resulting in the effect being widespread (<u>magnified</u>)
Ethylene is the considered as the aging & growth for fruits.
Infact, it produced by some fruits when ripening begins in them.
It changes the texture & shape of the fruit during ripening process.
For fruits ripening, it is used in positive nature. And, if nearby fruit are ripening as well, it is no longer a problem until the other fruit is damaged or dies. And, this does not happen if the concentration of ethylene is too much.
