Plant cell vacuole  

Usually Plant cells contain one or more membrane-bounded vacuoles. These are utilized to store nutrients (for example sucrose), ions, water and waste products (excess   nitrogen-containing   compounds especially). Like lysosomes in animal cells, vacuoles  have  an  acidic  pH  maintained  by H pumps  in the  membrane  and contain  a  variety  of  degradative   enzymes.  Into the vacuole entry of water causes it to expand, creating hydrostatic pressure (turgor) inside the cell which is balanced by the mechanical resistance of the cell wall.