plant development - lecture 6 Flashcards
What are the 3 key differences between plant and animal life cycles?
- postembyronic development
- cell movement and planes of division
- totipotency
key difference 1.1 - post embryonic development
- Most adult organs formed during embryogenesis whereas plant embryos do not contain any organs found in the adult
plant organs are generated by meristems during post embryonic
key difference 2 - cell movement and division planes
- animal cells move and migrate during embryonic development , whereas plants have cell was that cement them
What is a anticlinal division in plants?
- cell plate at right angle to surface
What is a periclinal division in plants?
- cell plate parallel to surface
Key difference 3 - totipotency
Animals cannot regenerate from somatic parts but plant cells can regenerate numerous body part.
Why do plants remain totipotent?
sessile ( anchored to the ground)
What occurs in pollination/fertilisation?
Germinates on top of the stigma. Pollen tube enters the stylle. One sperm fertilises female egg to get the embryo
What are the 4 stages of embryo development?
- Two cell proembryo
- Globular embryo
- heart embryo
- walking stick embryo
What are the 2 types of endosperm tissue?
Dicot and monocot
What is different about the first zygotic division?
- asymmetric
- produces small apical cell and larger basal cell
What is the basal cell?
suspensor
What is the apical cell?
embryo
What does whorl 1 produce?
sepal
What does whorl 2 produce?
petals
