#23 The Regeneration Success from Seeds

Question 1

Angiosperm vs Gymnosperm

Answer 1

Angio (flowering)
- contains anther and style
GymNO (non-flowering)

Question 2

What is required for seed germination?

Answer 2

Water, oxygen, and heat
Light is NOT required for germination

Question 3

list three components where a viable seed fails to germinate under favourable conditons

Answer 3

the seed
the environment
a time element

Question 4

Three types of dormancy

Answer 4

1. origin of control: structural or physiological/biochemical
2. degree/depth of control: deep dormancy (long period) and shallow dormancy (short period)
3. Timing of the control: primary, secondary, winter and summer dormancy

Question 5

Dormancy is a _______ _______ Trait

Answer 5

Genetically inherited

Question 6

What is the value of dormancy

Answer 6

• prevents germination under unfavourable conditions for establishment

Question 7

Thermal time model

Answer 7

• A method for calculating plant development rate by accumulating daily temperatures above a base threshold, typically expressed in degree-days (°C·day).
• Accounts for the temperature dependence of biological processes and allows for predictions of phenological events in fluctuating environmental conditions.

Key components:
Base temperature (Tb): The minimum temperature below which no development occurs.
Daily mean temperature: Used to calculate the accumulated thermal time.
Degree-days: The unit of measurement for thermal time1
The model is widely used in crop growth modeling and plant studies to standardize time across varying temperature conditions, enabling more accurate predictions of plant growth stages