Secretory Structures In Plants

Plant chemicals can be classed as primary or secondary metabolites, depending on whether or not they have an essential role in plant metabolism and arc universally present in all plants. Primary metabolites include sugars, amino acids. nucleic acids and the chlorophylls. Secondary metabolites make up all the remaining plant chemicals from alkaloids to phenols. Essential oils and other secondary plant metabolites are found in a wide range of plant species including annual, biennial or perennial...