Chapter 5: Morphology of Flowering Plants Flashcards
What are the characteristics of angiosperm
root , stem , leaves , flower and fruits
What is the root and the shoot system?
the part of the plant above the ground is the shoot system
the part of the plant below the ground is the root system
What leads to teh formation of primary root in dicot plant?
elongation of radicle leads to the formation of primary root
What are the components of the tap root system? Where do we fnd tap root system?
primary root , secondary root ,tertiary root
mustard
Where does the fibrous root start from give some examples?
from the base of the stem
example wheat plant
Where do we find adventitious root?
from the nodes
examples : monstera, banyan tree
What are hte main funcitons of the root syste?
absorption of mineral and water from soils
providing anchorage to the platn part
storing reserve plant material
synthesis of plant growth regulators
What are the various regions in the root of a plant?
root cap : thimble like structure
region of meristamatic activity
region of elongation
region of maturation (root hair prensent here)
Where are the root hairs present? What is their function?
in the region of maturation from some epidermal cells
absorption of water and mineral
Give some examples where the tap root modifies to store food?
tap root of radish , turnip , carrot
Give some examples where the adventitious root stores food ?
sweet potato
Where are prop root present ?
the prop roots are present in banyan tree
What is the modification of root in sugarcane and maize?
stilt root
Where are pneumatophore prenset and where are found?
pneumatophores are present in RHIZOPHORA in the swampy areas they help in respiration
Where does the stem develop from ?
from teh plumule of the embryo of the germinating seed
What is the region in the stem from where the leaves come up from called?
they are called nodes
What are types of buds in stem?
axillary and terminal buds
What are the main funcitons of stem?
spreading branches leaves , flowers and fruits conduct water , minreral and photosynthates storage of food support vegetative propagation
Give some exmaples of underground stem that are modified to store food?
potato , ginger , turmeric , zaminkhand , colocasia
Where do the stem tenrils derive from ? What is their function and where are they found?
stem tendrils : axillary bud
they are slenderand spirally coil and helps the plant to climb
GOURDS (CUCUMBER, PUMPKIN and WATERMELON)
GRAPES
What are thorns and where ar ethey found?
thorns : (modified axillary bud)
Bougainvillea
Where flattened stems found what is their funciton?
opuntia
they have chlorophyll for photosynthesis
Where the cylindrical modigication of stem found and what is their funciton?
euphorbia
they have chlorophyll for photopynthesis
What is the modificaiton of stem in jasmine and mint?
they have a slender lateral branch that arises from the base of the main axis and after growing for some times they arch back into the ground
STOLEN STEM
What is the stem modification in stem of pistia and eichornia?
OFFSET ROOT
lateral branch with short internodes and each nodes bearing a rosette of leaves and a tuft of root sis found in aquatic plant like pistia and Eichornia
What is the modificaiton of root in banana and where else is ti foud?
BANANA , PINEAPPLE , CHRYSANTHAMUM
teh lateral branches originate from the basal and undergroun portion of the main stem , growing horizontally beneath the surface and then come out obliquely upward giving rise to leafy shoot
Where does the leaf originate from ?
the node and bears buds in its axil
What does the axillary bud later develop into?
it later develops into branch
Where does the shot originate from (tissue) and how are the leaves arranged in it ?
originate : stem apical meristem
leaves are arranged in acropetal order
