Mottle is a pattern of irregular marks, spots, streaks, blotches or patches of different shades or colours. It is commonly used to describe the surface of plants or the skin of animals. In plants, mottling usually consists of yellowish spots on plants, and is usually a sign of disease or malnutrition.
There are several forms of leaf mottling viruses such as vein mottle, dwarf mottle, necrotic mottle, and viruses B and Q (Gosling, 1984). The viruses can be spread through propagation of infected stock and during subsequent handling. Early symptoms of mottle can be confused with nutritional disorders.
Soil mottling is a contrasting or “blotchy” color pattern within the dominant soil color. It is formed when the seasonal high-water table rises into aerobic soils, changing the conditions in the soils from aerobic (oxygen rich) to anoxic (without oxygen).
What is mottled skin? Mottled skin is usually a temporary condition. It occurs when blood flow to tiny vessels under your skin is disrupted. This results in a fine, bluish-red, lace-like pattern (reticula).
mottled; mottling ˈmät-liŋ -ᵊl-iŋ : to mark with spots or blotches of different color or shades of color as if stained.
Mottle is a pattern of irregular marks, spots, streaks, blotches or patches of different shades or colours. It is commonly used to describe the surface of plants or the skin of animals. In plants, mottling usually consists of yellowish spots on plants, and is usually a sign of disease or malnutrition.
This structural defect occurs when malleable cast iron does not solidify completely in white as a result of an incorrect composition (carbon-silicon and manganese-sulfur ratio) and when traces of aluminum, lead and arsenic are contained in the iron.
The first organ system to “close down” is the digestive system. Digestion is a lot of work! In the last few weeks, there is really no need to process food to build new cells. That energy needs to go elsewhere.
Mottling of the skin is a common symptom that occurs near the end of life. Red and purples spots appear on the toes, feet, and fingers and spread slowly up the arms and legs. Lips may turn purple as well. Mottling is caused by poor circulation; the patient's heart can no longer pump blood effectively.
If your skin looks mottled because of cold weather or stress, try warming up if you are cold or relaxation techniques if you are stressed. Warm up your skin with a warm bath, jacket or blanket. Try gentle exercises to improve circulation or deep breathing exercises.
What does colour mottling indicate? Colour mottling is strong whenever a soil is subject to waterlogging, even if the soil is highly permeable. However, colour mottling may also occur for other reasons. If mottling occurs in a bright-coloured B-horizon, it is not related to a drainage problem.
There are three major signs of unhealthy soil, specifically low moisture, high compactions and poor growth. If soil is dry and crumbly when you touch it, it is not retaining moisture. Soil needs moisture to hold nutrients and allow plants to thrive.
The number and color of soil mottles is a good indication of soil drainage and aeration1. They are also an early warning of a decline in soil structure caused by compaction. Mottles develop as various shades of orange and grey. As oxygen depletion increases, orange, and ultimately grey, mottles predominate.
In magnesium-deficient palms, leaf tips turn bright yellow, while leaf bases and along the midrib remain green. Lower (older) fronds may die prematurely. In magnesium-deficient broadleaves, foliage can become chlorotic or chlorotic and necrotic.
Leaf spots may be angular or rounded, raised or sunken, and have smooth or fringed edges. Colors can range from yellow to yellow-green to orange-red to light tan, brown or black. A variety of sizes of leaf spots may be observed on one plant. Smaller leaf spots are younger infections.
MUMMIFICATION: Darkening, wrinkling, harden- ing of rotted fruit. Results from a rapid loss of moisture from the fruit.
Mottling occurs when the heart is no longer able to pump blood effectively. The blood pressure slowly drops and blood flow throughout the body slows, causing one's extremities to begin to feel cold to the touch. Mottled skin before death presents as a red or purple marbled appearance.
In the hours before death, most people fade as the blood supply to their body declines further. They sleep a lot, their breathing becomes very irregular, and their skin becomes cool to the touch. Those who do not lose consciousness in the days before death usually do so in the hours before they die.
Initial Appearance: Mottling starts in the final days, often on the feet, due to reduced blood circulation. Progression: Over hours to days, it spreads to hands and other areas, appearing blotchy with red or purple patches.
Physical signs of dying
They might close their eyes frequently or they might be half-open. Facial muscles may relax and the jaw can drop. Skin can become very pale. Breathing can alternate between loud rasping breaths and quiet breathing.
Even when vascular collapse is the primary event, brain and lung functions stops next. The heart is the last organ to fail. The heart stops following PEA, but PEA is not cardiac arrest. The heart finally stops when it arrives at asystole, which is cardiac arrest (Figure 1).
A purplish or blotchy red-blue coloring on knees and/ or feet (mottling) is a sign that death is very near. Because the body no longer needs large amounts of energy and because the digestive system is slowing down, the need for and interest in food (and eventually fluids) gradually lessens.
Mottles are spots or blotches of different colour, generally grey or orange, interspersed with the dominant soil colour. The number, size and colour of soil mottles provide a good indication of how well the soil is aerated.
Mottling of the leaves takes place first at the edge of the leaf and progresses slowly toward the veins and to the base of the leaf. Usually the pair of leaves immediately above these mottles next, and so on as the plant grows.