many people with early stage lyme disease develop a distinctive circular rash at the site of the tick bite usually around 3 to 30 days after being bitten this is known as erythema migrans the rash is often described as looking like a bull s eye on a dart boardany people with early stage lyme disease develop a distinctive circular rash at the site of the tick bite usually around 3 to 30 days after being bitten this is known as erythema migrans the rash is often described as looking like a bull s eye on a dart board
For example, giberellins stimulate cell division in shoot apical meristem, causing the plant to grow taller. These hormones also cause cell elongation in intercalary meristem of grasses. Cytokinin and auxin are also important growth regulators.ateral meristem is called the vascular cambium in many of the plants in which it is found. Secondary growth gives a plant added stability that allows for the plant to grow taller. Lastly, some plants have intercalary meristem.
Plant Hormones and Plant Growth Regulators. Another factor in plant growth is the influence of plant hormones. Hormones are chemicals produced by plants that regulate the growth processes.Plant growth regulators are chemicals applied by a horticulturist to regulate plant growth.igure 4. Geotropism â Under the influence of gravity, auxins accumulate in the lower side of a horizontal stem, causing cells to enlarge faster, turning the stem upright. Figure 5. Phototropism The auxin concentration on the shaded side stimulates cell elongation, turning the stem to the sun.