Cytokinins Flashcards
cytokinins control – and central in plant growth and dev
cell division
plant cell that retain its nucleus at – is capable of dividing
maturity
A. tumefaciens can invade wounds and cause plant tumors, –, via cytokinin response
crown galls
tissue removed from crown galls into culture media will grow as a mass of disorganized, relatively undifferentiated cells called –
callus tissue
isolated from autoclaved herring sperm DNA that promoted cell division – (not naturally occurring)
kinetin
extracts from maize endosperm that promoted cell division
zeatin
causes lateral buds to grow in concert
witches broom
A. tumefasicens contain – which is incorporated into the nuclear DNA of the host plant cell and which expresses a gene that drives cytokinin production
Ti plasmid
cytokinins are synthesized in –
root apical meristem
cytokinins move through – into the shoot
xylem
zeatin increases the rate of –
cytokinesis
cytokinin – root growth
suppresses
over expression of cytokinin oxidase leads to reduction in cell proliferation in the apical meristem and – of root growth
enhancement
cytokinins also promote – of cotyledons and leaves
expansion
cytokinins also increase the extensibility of cell walls but do not rely on – like auxin
proton extrusion
cytokinin stimulate bud formation from the – in mosses (filament of cells arising from the germination of moss spores)
protonema
detached leaves lose chlorophyll, RNA, lipids, and proteins
senescence
– leaves produce cytokinin
young
mature leaves depend on – cytokinins to postpone their senescence
root-derived
cytokinin influence the movement of nutrients into leaves
cytokinin-induced nutrient mobilization
in etiolated seedlings, chloroplasts don’t mature but develop into
etioplasts
