Growth

Growth from start to finish:



Corn
First Sprout!

Corn
Almost Fully Grown!

Bean
First Sprout!



Bean
Almost Fully Grown!

Meristem: plant tissue that remains embryonic  asa long as the plant lives, allowing for indeterminate growth
Primary Growth: growth produced by apical meristems, lengthening stems and roots

Secondary Growth: growth produced by lateralmeristems, thickening the shoots and roots of woody plants

Vascular Cambium: a cylinder of meristematic tissue in woody plants that adds layers of secondary vascular tissue called secondary xylem and secondary phloem

Cork Cambium: a cylinder of meristematic tissue in woody plants that replaces the epidermis with thicker, tougher cork cells

Hormones Involved:

• Auxin: A term that primarily refers to indoleacetic acid, a natural plant hormone that has a variety of effects, including cell elongation, root formation, secondary growth, and fruit growth
• Cytokinin: Any of a class of related plant hormones that retard aging and act in concert with auxin to stimulate cell division, influence the pathway of differentiation, and control apical dominance
• ABA (Abscisic Acid): A plant hormone that slows growth, often antagonizing the actions of growth hormones. Two of its many effects are to promote seed dormancy ans facilitate drought tolerance
• Gibberelin: Any of a class of related plant hormones that stimulate growth in the stem and leaves, trigger the germination of seeds and breaking of bud dormancy, and stimulate fruit development

Tropism: A growth response that results in the curvature of whole plant organs toward or away from stimuli due to differential tares of cell elongation