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Summary
The Author studies the action of the presence of the ear and its parts in the growth of the stem and in the value of the water of traspiration and of assimilation in the higher leaf. The stet shows:
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A removed ear, not yet mature, exerts a depressing effect upon the development of the stem and ucon the leaf's functions.
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The threads and the pistils removed inhibit the enlongament of the stem and alter the functions of leaves.
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Maturing seeds removed cause trubles on the function of the vegetative organ.
This phenomen is due to the presence of an hormonical substances elaborated in the riproduction's orgas, which are considerated the centre of functional correlation.