Coconut seed : Coconut seed
Cocos = Competition tips : Cocos = Competition tips Coconut fruit is called fibrous drupe
Mesocarp yields coir fibres
Cocos is called Kalpavriksha
It has liquid endosperm
It exhibits vivipary
It shows anemophily and hydrochory
It belongs to monocot palm family Areaceae
Cocos yields = Pregnenolone : Cocos yields = Pregnenolone Coconut oil is rich in Pregnenolone is a steroid hormone involved in the steroidogenesis of progesterone, mineralocorticoids, glucocorticoids, androgens, and estrogens.
As such it is a prohormone
2. Cellular : 2. Cellular When the cell wall are laid down around the diving nuclei.
E.g. Anona,
Adoxa,
Peperomia
Anona : Anona
Anona = Competition tips : Anona = Competition tips The fruit is etaerio of berries (drupe).
It is formed from apocarpous ovary.
Adoxa : Adoxa
Peperomia= Competition tips : Peperomia= Competition tips It has thickest epidermis on leaves about 15-16 layered thick.
It has tetra nucleated embryosac.
3. HELOBIAL : 3. HELOBIAL When the upper chamber has free nuclei and the lower chamber cellular
E.g. Vallisneria
Eremures Helobiales
Limnophyton
Vallisneria : Vallisneria
Eel grass : Eel grass
Limnophyton : Limnophyton
EMBRYOGENESIS : EMBRYOGENESIS Father of Indian plant embryology......
P. MAHESHWARI
Development of Dicots and Monocots is similar upto 8 celled stage which is
globular in shape called as OCTANT or EMBRYONAL MASS
4 Celled stage is called as PROEMBRYO
XENIA : XENIA Term ‘Xenia’ was coined by Focke
In course of hybridization, the pollen
Changes the appearance of the hydrid seed
while still on mother plant this is called as XENIA.
Eg.1. If a pollen from the yellow endosperm
race of Zea mays is placed on the stigma
of the white endosperm race, the resultant
endosperm formed is yellow in colour.
Eg.2. Glutinous and starchy grains of rice
Eg.3. Starchy and sugary grains of Zea mays