CHAPTER VI 

 FOOD RESERVOIRS 



74. STOREHOUSES. All greatly thickened or congested 

 parts are reservoirs for the storage of plant-food. This 

 food is mostly starch. Potatoes, beets, turnips, thick 

 rhizomes, seeds, are examples. Recall how potatoes sprout 



42. Potato sprouts. The sprouts have used the food stored in the tuber, 

 and the tuber has shrivelled. 



in the cellar (Fig. 42) : the sprouts are produced from the 

 stored food. 



75. The presence of starch can ~be determined ~by apply- 

 ing diluted tincture of iodine to the part : if a blue or 



(31) 



