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Summary
Previous investigations (Tonzig and Trezzi, 1950) had evidenced that the action exerted by ascorbic acid (AA) on the plasm's structural viscosity is opposite to the one developed by growth-promoting substances. In this paper, the antagonist relation existing between AA and growth substances is examined in the light of what is regarded as the most typical effect of the latter, viz., their stimulation of cellular elongation and of organ lengthening.
All tests have shown that in oats coleoptiles, bean and castor hypocotyls and pea stems an enrichement in the AA contents, no matter how obtained, exerts a deterring action on both the cell growth and the legthening of the aforesaid organs.
Likewise, the opposite effect is obtained, as already know, by lowering the AA contents.
A confirmation is furthermore provided of the previous results as to the action exerted by AA on the structural viscosity of plasm.