Orchid Ladys slipper Cypripedium pubescens var calceolus

Plate 65 Stalked glandular trichonies on upper leaf surface (LM, incident illumination, fresh, unstained) xlOO . Plate 65 Stalked glandular trichonies on upper leaf surface (LM, incident illumination, fresh, unstained) xlOO . Plate 66 Root (T S) showing cortex parenchyma cells filled with starch grains (SliM.Cl'D) x67 . Plate 67 Leaf (T S) showing stalked glandular trichome with unicellular head (LM, BF, stained withsafranin and fast green) x2< )5 .

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...