Root Flashcards
Root cap (calyptra)
It is a cap like covering over the tip of root that helps in protection against friction from soil practicles
Growing point or region of cell division or meristematic region
It lies just behind the root cap where active cell division takes place
Tap root system
The root developing directly from the radicle of embryo that consist of single primary root or main root is called tap root system
Fuciform roots and example
It is a fleshy modified spindle like tap root system having primary root is swollen in the middle which is gradually tapers towards the apex as well as towards the base. Eg=radish
Napiform roots and example
It is the fleshy modified tap root system having primary root swollen at base and middle portion but the apex is pointed and form top like structures. Eg=turnip
Conical roots & example
It is fleshy modified tap root system having primary tap root is wider at the base which is gradually tapering towards the apex and forms cone shaped structure. Eg=carrot
Tuberous roots
They are irregular fleshy modified tap root system present in Mirabilis jalapa, trichosanthes etc
Pneumatophores
They are short, vertically upward growing negatively geotropic roots present in sea Coast areas that help in aeration
Pneumathodes
Air enter into these roots through breathing pores called pneumathodes
Nodulated or tuberculated root
They are present in root of legumes that consist of numerous small or large irregular swelling called root nodules or tubercles
Buttress roots or plank roots
They are laterally compressed horizontal roots that travel along the ground for some distance and help in extra mechanical support
Mycorrhizal root
They are the roots of higher plant that show symbiotic association with fungi
Reproductive roots
Adventitious bud containing roots that helps in reproduction
Adventitious root
Root develops from any parts of the plant other than radicle of embryo
Fibrous root
It is the type of adventitious root in which primary root does not persist for long time and soon replaced by the roots originating from base of the stem
Foliar roots
Roots that are developed from leaf
Prop roots
They are vertically growing roots developed from horizontal aerial branches of large sized plant for mechanical support
Stilt root
They are small obliquely placed root developed from basal nodes of main stem
Climbing or clinging roots
Those root developed from nodes, inteenodes or both nodes and inteenodes of plant
Floating roots
Those roots developes from nodes in addition to ordinary A. R
Assimilatory roots
Aerial A. R of some plant have chlorophyll that helps in photosynthesis
Contractile roots
Turgid glucose rich roots
Parasitic roots
Parasitic plants develop roots that penetrate into host plant for absorption of nutrition
