its absorption spectrum. Acetyl CoA Small, water-soluble metabolite comprising an acetyl group linked to coenzyme A (CoA). Action Spectrum A graphic representation showing the rate of photosynthesis at different wavelengths of light is called action spectrum Active site Region of an enzyme molecule where the substrate binds and undergoes a catalyzed reaction. Aeroponics A technique of growing plants suspended over the nutrient solution in a mist chamber.
Nutrient sprayed by motor driven rotor on the roots. Agar Jelly-like substance, derived from red algae Akinetes Thick walled, dormant, non motile asexual spores. Aleurone Outer layer of the endosperm Allelopathy The chemical substances released by one plant species which affect or benefit another plant Amphicribal/ Hadrocentric Xylem in the centre with phloem surrounding it. Example: Ferns (Polypodium) Amphivasal / Leptocentric Phloem in the centre with xylem surrounding it.
Example: Dragon plant – Dracena and Yucca Anabolic It is an enzyme catalyzed reaction in a cell that involves synthesis of complex molecules from simple molecules which uses energy. Anamorph Asexual or imperfect state of fungi Anisogamy Fusion of morphologically and physiologically dissimilar gametes Apical cell theory Single apical cell growing into whole plant Apogamy Formation of sporophyte from the gametophytic tissue without the fusion of gametes. Apospory Development of the gametophyte from the sporophyte without the formation of spores Axil Parenchyma Parenchyma arranged longitudinally along the axis Balausto Fleshy in dehiscent fruit Basal body Structure at the base of cilia and flagella from which microtubules forming the axoneme radiate Biosphere The region of earth on which life exist Buffer A solution of the acid and base form of a compound that undergoes little change in pH when small quantities of strong acid or base are added. Callose Sieve pores are blocked by substances called callose Carbonic acid A weak acidic solution of carbon-di-oxide dissolved in water Carcinogen Any chemical or physical agent that can cause cancer when cells or organism s are exposed to it.
Catabolic It is an enzyme catalyzed reaction in a cell that involves degradation of molecules into simple subunits which release energy. Chelating agents A chelate is the soluble