Week 3 - Cytokinins Flashcards
1
Q
What do Cytokinins do?
A
they stimulate cytokinesis (cell division), and work with auxin to control cell division and differentiation
2
Q
where do cytokinins come from
A
form actively growing tissues
3
Q
what does cytokinin promote
A
Cell division if auxin is present
lateral bud growth
leaf expansion with cell enlargement
chloroplast enlargement
4
Q
what does cytokinin inhibit
A
leaf senescence (programmed aging) and root growth
5
Q
what is Zeatin
A
most abundant natural cytokinin, stimulates mature plant cells to divide when auxin is present
6
Q
Cytokinin transport
A
they are transported with the xylem
7
Q
Auxin and Ck ratios control what
A
high ratio = root growth
low ratio = shoot growth
