2

Here’s a paragraph from my sec 2 brother’s assignment which he’s getting me to print for him, its 1 out of 9 of it

xi) Describe how plant growth hormones can be used to control plant morphogenesis to obtain a whole new plant.

            As I have stated in the previous question, there are four broad classes of growth regulators the auxins, cytokinins, gibberellins, and abscisic acid. It was reported that the ration of auxin to cytokinin determined the type and extent of organogenesis in plant cell cultures. Both auxin and cytokinin are usually added to culture media in order to obtain morphogenesis. Considerable variability exists among genera, species, and even cultivars in the type and amount of auxin and cytokinin required for induction of morphogenesis.
The auxins commonly used in plant tissue culture media are 1H-indole-3-acetic acid (IAA), 1H-indole-3-butyric acid (IBA), (2,4-dichlorophenoxy) acetic acid (2,4-D), and 1-napthaleneacetic acid (NAA). The only naturally occurring auxin found in plant tissues is IAA. Other synthetic auxins that have been used in plant cell culture include 4-chlorophenoxyacetic acid or p-chlorophenoxyacetic acid (4-CPA, PCPA), (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T), 3,6-dichloro-2-methoxybenzoic acid (Dicamba), and 4-amino-3,5,6-trichloropicolinic acid (Picloram).

No shit, seriously.