DEVELOPMENT OF DICOT EMBRYO

DEVELOPMENT OF DICOT EMBRYO :-

There are mainly some steps by which all the development are occur are :-
- Firstly, mature zygote get enlarge in large 
- then this zygote Divide Into two cell By unequal division , in which upper Cell called Vasicular cell or primary suspensor cell & Lower cell called primary embryonal cell
- Now embryonal cell redivide form two cell, And Vascicular cell remain as such , which at last act for absorption
- now many division occur in embryonal cell , which form suspensor cell (may be of 6-18 celled) , but woith this one cell remain as such, which enaleges
- this cell enlarge & divide to form four cell stage called Quardant stage, then 8 cell stage called octant stage , then 16 cell stage called pro-embryo or glomerular embyo

Note :- The cell with present between suspensor & Pro-embryo called hypophysis cell, which is triangular in shape
- Now pro-embry slowly converted into heart shaped embryo, which having centrally located meristem cell , which begun to form
- after that these pro-embryo elongate & get mature to form mature form, which having pleurone at centre , plumule between two cotlydone , dermatogen layer at outer side & pedicle
- At Last, Fully development two cotlydone formed , which having vasicular cell or Hausterial cell uppermost side, many suspensor cell , then after root cap , two cotlydone in their centre plumule are present & tip of this called embryonal node
Note :- Distance between Root cap to plumule called hypocotyl
- Distance between plumule to embryonal node called epicotyl

DEVELOPMENT OF MONOCOT EMBRYO :-

These also occur in many steps as follow are :-
- Firstly, mature zygote get enlarge in large
- then this zygote Divide Into two cell By unequal division , in which upper Cell form Suspensor cell , which at micropylar end & another one called emnryonal cell
- Now Suspensor cell remain such as & embryonal cell divide into three divion which form upper (basal ) cell, middle (basal cell) & Lower embryonal cell or terminal cell
- Now middle cell divide to form globular like structure , with terminal cell at tip of these globular
- Some division occur in these globular cell , which form radicle layer, hypocotyl cell layer , plumule cell & at last cotlydone which form by terminal cell
- Now after maturation one cotyledone form having suspensor cell, radicle hypocotyl plumule & one cotyledone