The leaf on the right shows a positive test for starch in the areas which contained chlorophyll, and a negative test for starch in the areas which lack chlorophyll. This is evidence that ...

IN a recent communication to the Arbeiten ties botan isches Institut in Würzburg (Bd. iii.), Prof. Sachs gives the results of his work during the past summer in connection with the above subject.

Test the leaf for starch using the 4-step starch test. Make another drawing of the leaf. In this drawing show the areas of the leaf that tested positive and those that tested negative for starch.

Download link is given at the end of this article Iodine solution is used to test leaves for the presence of starch. In order to perform this test, one needs to heat the plant leaf in boiling ...