Photosynthate movement Flashcards
1
Q
What does the phloem transport?
A
photosynthate product (carbohydrate) organic compound (metabolites, hormones) Mineral nutrients
2
Q
The upper leaves supply which part?
A
shoot tip
3
Q
The lower leave supply which part?
A
root system
4
Q
What are the phloem elements in angiosperm
A
Sieve tube element
Sieve plates
Companion cell
5
Q
Which is the non reducing sugars (from carbohydrate). Only one transported in phloem
A
Sucrose (glucose + fructose)
6
Q
Where the carbohydrate is converted in sucrose
And during which period of the day
A
mesophyll cells
NIGHT
7
Q
From what are formed the carbohydrate
It occurs during which period
A
From photosynthesis. They travel from chloroplast to cytosol
DAY (need light for photosynthesis
8
Q
What happens after sucrose is produce in mesophyll cell
A
PHLOEM LOADING
- sucrose loaded in sieve tube
- high water concentration in the xylem, water goes in the sieve tube
- high concentration of water and sucrose in the sieve tube. downward movement
- sucrose unloaded in sink with water. lower pressure in phloem
