mode of nutrition. Example: Neottia . Roots of Neottia (Bird’s Nest Orchid) associate with mycorrhizae and absorb nutrients as a saprophyte. Monotropa (Indian Pipe) grow on humus rich soil found in thick forests.
It absorbs nutrient through mycorrhizal association (Figure . ). Neottia Monotropa (Bird's Nest Orchid) (Indian Pipe) Figure . : Saprophytic Mode of nutrition .
. Parasitic mode of nutrition in angiosperms Organisms deriving their nutrient from another organism (host) and causing disease to the host are called parasites. a. Obligate or Total parasite - Completely depends on host for their survival and produces haustoria.
i. Total stem parasite : The leafless stem twine around the host and produce haustoria. Example: Cuscuta (Dodder), a rootless plant growing on Zizyphus , Citrus and so on. ii.
Total root parasite : They do not have stem axis and grow in the roots of host plants produce haustoria. Example: Rafflesia , Orobanche and Balanophora . b. Partial parasite - Plants of this group contain chlorophyll and synthesize carbohydrates.
Water and mineral requirements are dependent on host plant. i. Partial Stem Parasite : Example: Loranthus and Viscum (Mistletoe) Loranthus grows on fig and mango trees and absorb water and minerals from xylem. lid.
When insect is trapped, proteolytic enzymes will digest the insect. b. Drosera (Sundew): It consists of long club shaped leaves with tentacles that secrete sticky digestive fluid which looks like a sundew and attracts insects. c.
Utricularia (Bladder wort): Submerged plant in which leaf is modified into a bladder to collect insect in water. d. Dionaea (Venus fly trap): Leaf of this plant modified into a colourful trap. Two folds of lamina consist of sensitive trigger hairs and when insects touch the hairs it will close and traps the insects.(Figure .
). Figure . : Insectivorous mode of nutrition Lichens are indicators of SO pollution and a pioneer species in xeric succession. Check your grasp!
Mineral X required for the activation of enzyme nitrogenase, Mineral Y involved in transport of sugar and Mineral Z required for maintaining ribosome structure. Identify X, Y and Z. Summary Sources of