abio
Subject:
Biology [1]
Tags:
Biology [2]
Plant hormones [3]
Botany [4]
Chemistry [5]
Plant morphology [6]
Plant physiology [7]
Seeds [8]
Cytokinin [9]
Auxin [10]
Abscisic acid [11]
Abscission [12]
Gibberellin [13]
health [14]
39.2 Plant hormones 131095 SunHa Lee cytokinins - 2) apical dominance Apical dominance: ability of the apical bud to suppress the development of axillary buds Direct inhibition hypothesis: auxin & cytokinins act antagonistically in regulating axillary bud growth - auxin: sent from apical bud, directly inhibits axillary growth - cytokinins: sent from roots, signals axillary growth Ratio of auxin and cytokinins is important 2) apical dominance Apical bud removed: no inhibition of axillary buds, more lateral branches Auxin added: lateral bud growth repressed Overload of cytokinins: more lateral branches, bushier 3) anti-aging effects Slow aging - inhibit protein breakdown - stimulate RNA and protein synthesis - mobilize nutrients from nearby tissues